What airlines fly to Illinois?

United Airlines, American Airlines and Southwest are the top three most popular airlines that fly to Illinois from Washington, D.C. Reagan-National Airport according to our data. United Airlines is the first choice among our users, with 51% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 4 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Washington, D.C. Reagan-National to Illinois?

United Airlines, Delta, and Southwest are the most popular carriers operating from Washington, D.C. Reagan-National to Illinois

How many operators does momondo search for flights from Washington, D.C. Reagan-National Airport to Illinois?

As of August 2026, there are 4 operators available to choose from for flights from Washington, D.C. Reagan-National Airport to Illinois.

How old do you have to be to fly from Washington, D.C. Reagan-National Airport to Illinois?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. Reagan-National Airport to Illinois.

What documentation or ID do you need to fly to Illinois?

The travel and health documents required for your trip to Illinois can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$89 Cheap Flights from Washington, D.C. Reagan-National Airport to Illinois in 2026

Q: How many flights depart from Washington, D.C. Reagan-National Airport to Illinois on average per day?

As of August 2026, 44 flights take off from Washington, D.C. Reagan-National Airport and land in Illinois each day. The most common flight departure time for this route is 5:00PM, with 42% of daily flights taking off at noon.

Q: How many flights depart from Washington, D.C. Reagan-National Airport to Illinois on average per week?

308 flights are operational weekly from Washington, D.C. Reagan-National Airport to Illinois as of August 2026. The most popular departure day for this route is Wed, with 22% of flights per week taking off on this day.

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Washington, D.C. Reagan-National Airport to Illinois

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:30 am - 7:58 amDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

2h 28mnonstop

6:55 pm - 10:00 pmORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

2h 05mnonstop

$178American Airlines

Thu, Sep 24 - Mon, Sep 28

5:00 pm - 6:29 pmDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

2h 29mnonstop

6:59 am - 10:06 amORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

2h 07mnonstop

$178American Airlines

Thu, Oct 1 - Sat, Oct 31

7:00 am - 12:23 amDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

18h 23m1 stop Denver Intl

6:30 am - 9:59 pmORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

14h 29m1 stop Denver Intl

$182Frontier

Mon, Sep 28 - Wed, Sep 30

2:40 pm - 5:45 pmDCA Washington, D.C. Reagan-National-MDW Chicago Midway

4h 05m1 stop Lambert-St Louis

11:05 am - 1:55 pmMDW Chicago Midway-DCA Washington, D.C. Reagan-National

1h 50mnonstop

$183Southwest

Wed, Nov 11 - Sat, Nov 14

2:40 pm - 5:45 pmDCA Washington, D.C. Reagan-National-MDW Chicago Midway

4h 05m1 stop Lambert-St Louis

12:25 pm - 3:15 pmMDW Chicago Midway-DCA Washington, D.C. Reagan-National

1h 50mnonstop

$183Southwest

Tue, Nov 3 - Thu, Nov 5

6:10 am - 9:07 amDCA Washington, D.C. Reagan-National-MDW Chicago Midway

3h 57m1 stop Detroit Metropolitan Wayne County

4:30 pm - 11:44 pmMDW Chicago Midway-DCA Washington, D.C. Reagan-National

6h 14m1 stop Atlanta Hartsfield-Jackson

$184Delta

Tue, Sep 29 - Sat, Oct 3

7:00 am - 12:24 amDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

18h 24m1 stop Denver Intl

6:30 am - 9:50 pmORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

14h 20m1 stop Denver Intl

$187Frontier

Fri, Oct 23 - Mon, Nov 2

11:57 am - 1:13 pmDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

2h 16mnonstop

5:00 am - 12:29 pmORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

6h 29m1 stop Newark

$190United Airlines

Tue, Sep 29 - Fri, Oct 30

9:40 am - 12:39 pmDCA Washington, D.C. Reagan-National-MDW Chicago Midway

3h 59m1 stop Detroit Metropolitan Wayne County

1:00 pm - 8:37 pmMDW Chicago Midway-DCA Washington, D.C. Reagan-National

6h 37m1 stop Atlanta Hartsfield-Jackson

$194Delta

Tue, Sep 22 - Wed, Sep 23

7:35 am - 9:00 amDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

2h 25mnonstop

4:59 pm - 8:04 pmORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

2h 05mnonstop

$205United Airlines

Tue, Dec 22 - Tue, Dec 29

Cheap last minute flights

Enter your travel dates to find the best prices.

7:00 am - 1:36 pmDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

7h 36m1 stop Denver Intl

6:30 am - 9:59 pmORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

14h 29m1 stop Denver Intl

$301Frontier

Tue, Sep 1 - Wed, Sep 9

7:00 am - 1:36 pmDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

7h 36m1 stop Denver Intl

6:30 am - 9:59 pmORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

14h 29m1 stop Denver Intl

$320Frontier

Tue, Sep 1 - Thu, Sep 10

1:04 pm - 7:03 pmDCA Washington, D.C. Reagan-National-PIA Greater Peoria

6h 59m1 stop Chicago O'Hare Intl

5:45 am - 11:01 amPIA Greater Peoria-DCA Washington, D.C. Reagan-National

4h 16m1 stop Chicago O'Hare Intl

$365United Airlines

Sat, Aug 29 - Wed, Sep 2

7:14 pm - 10:59 pmDCA Washington, D.C. Reagan-National-PIA Greater Peoria

4h 45m1 stop Charlotte Douglas

4:24 pm - 9:51 pmPIA Greater Peoria-DCA Washington, D.C. Reagan-National

4h 27m1 stop Charlotte Douglas

$365American Airlines

Sat, Aug 29 - Wed, Sep 2

2:45 pm - 4:00 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

2h 15mnonstop

1:10 pm - 4:10 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 00mnonstop

$380Southwest

Sun, Aug 30 - Tue, Sep 29

3:40 pm - 6:40 pmDCA Washington, D.C. Reagan-National-STL Lambert-St Louis

4h 00m1 stop Milwaukee-Mitchell

3:30 pm - 6:35 pmSTL Lambert-St Louis-DCA Washington, D.C. Reagan-National

2h 05mnonstop

$386Southwest

Sun, Aug 30 - Tue, Sep 29

2:44 pm - 6:15 pmDCA Washington, D.C. Reagan-National-PIA Greater Peoria

4h 31m1 stop Chicago O'Hare Intl

4:24 pm - 11:59 pmPIA Greater Peoria-DCA Washington, D.C. Reagan-National

6h 35m1 stop Charlotte Douglas

$387American Airlines

Sat, Aug 29 - Thu, Sep 3

7:00 am - 1:36 pmDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

7h 36m1 stop Denver Intl

3:00 pm - 11:27 pmORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

7h 27m1 stop Fort Lauderdale

$396Multiple Airlines

Tue, Sep 1 - Wed, Sep 9

9:30 am - 2:57 pmDCA Washington, D.C. Reagan-National-PIA Greater Peoria

6h 27m1 stop Chicago O'Hare Intl

8:29 am - 2:23 pmPIA Greater Peoria-DCA Washington, D.C. Reagan-National

4h 54m1 stop Chicago O'Hare Intl

$402United Airlines

Fri, Aug 28 - Wed, Sep 2

6:00 pm - 1:36 pmDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

20h 36m1 stop Denver Intl

2:45 pm - 11:33 pmORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

7h 48m1 stop Fort Lauderdale

$403Multiple Airlines

Mon, Aug 31 - Sun, Sep 6

Cheap direct flights

Enter your travel dates to find the best prices.

5:00 pm - 6:29 pmDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

2h 29mnonstop

6:59 am - 10:06 amORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

2h 07mnonstop

$178American Airlines

Thu, Oct 1 - Sat, Oct 31

6:30 am - 7:58 amDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

2h 28mnonstop

6:55 pm - 10:00 pmORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

2h 05mnonstop

$178American Airlines

Thu, Sep 24 - Mon, Sep 28

8:35 pm - 10:00 pmDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

2h 25mnonstop

7:55 am - 10:59 amORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

2h 04mnonstop

$178American Airlines

Sat, Oct 10 - Sat, Oct 17

3:58 pm - 5:28 pmDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

2h 30mnonstop

8:55 pm - 11:59 pmORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

2h 04mnonstop

$178American Airlines

Thu, Sep 17 - Mon, Sep 21

7:35 am - 9:00 amDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

2h 25mnonstop

4:59 pm - 8:04 pmORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

2h 05mnonstop

$205United Airlines

Tue, Dec 22 - Tue, Dec 29

5:10 pm - 6:31 pmDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

2h 21mnonstop

6:00 pm - 9:11 pmORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

2h 11mnonstop

$216United Airlines

Fri, Nov 6 - Sat, Nov 7

8:40 pm - 9:40 pmDCA Washington, D.C. Reagan-National-MDW Chicago Midway

2h 00mnonstop

11:10 am - 2:00 pmMDW Chicago Midway-DCA Washington, D.C. Reagan-National

1h 50mnonstop

$216Southwest

Fri, Oct 16 - Sat, Oct 17

9:15 pm - 10:15 pmDCA Washington, D.C. Reagan-National-MDW Chicago Midway

2h 00mnonstop

5:10 pm - 8:05 pmMDW Chicago Midway-DCA Washington, D.C. Reagan-National

1h 55mnonstop

$216Southwest

Thu, Sep 17 - Sat, Sep 19

3:30 pm - 4:50 pmDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

2h 20mnonstop

6:59 am - 9:55 amORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

1h 56mnonstop

$216United Airlines

Fri, Nov 6 - Mon, Nov 9

8:40 pm - 9:40 pmDCA Washington, D.C. Reagan-National-MDW Chicago Midway

2h 00mnonstop

8:45 pm - 11:30 pmMDW Chicago Midway-DCA Washington, D.C. Reagan-National

1h 45mnonstop

$216Southwest

Fri, Oct 16 - Mon, Oct 19

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Frontier flights from Washington, D.C. Reagan-National Airport to Illinois

Our best Frontier deals on Washington, D.C. Reagan-National Airport to Illinois flight tickets

Frontier

Sep 28

DCA7:00 amWashington, D.C. Reagan-National

18h 23m

1 stop

ORD12:23 amChicago O'Hare Intl

Sep 30

ORD6:30 amChicago O'Hare Intl

14h 29m

1 stop

DCA9:59 pmWashington, D.C. Reagan-National

$182

Frontier

Oct 16

DCA7:00 amWashington, D.C. Reagan-National

18h 24m

1 stop

ORD12:24 amChicago O'Hare Intl

Oct 19

ORD6:30 amChicago O'Hare Intl

14h 29m

1 stop

DCA9:59 pmWashington, D.C. Reagan-National

$187

Frontier

Oct 1

DCA7:00 amWashington, D.C. Reagan-National

18h 23m

1 stop

ORD12:23 amChicago O'Hare Intl

Oct 7

ORD6:30 amChicago O'Hare Intl

28h 34m

1 stop

DCA12:04 pmWashington, D.C. Reagan-National

$188

United Airlines flights from Washington, D.C. Reagan-National Airport to Illinois

Our best United Airlines deals on Washington, D.C. Reagan-National Airport to Illinois flight tickets

United Airlines

Oct 27

DCA9:05 amWashington, D.C. Reagan-National

7h 09m

1 stop

ORD3:14 pmChicago O'Hare Intl

Oct 31

ORD7:00 amChicago O'Hare Intl

1h 56m

DCA9:56 amWashington, D.C. Reagan-National

$205

United Airlines

Sep 18

DCA6:30 amWashington, D.C. Reagan-National

2h 14m

ORD7:44 amChicago O'Hare Intl

Sep 19

ORD12:45 pmChicago O'Hare Intl

2h 02m

DCA3:47 pmWashington, D.C. Reagan-National

$216

United Airlines

Dec 24

DCA7:35 amWashington, D.C. Reagan-National

2h 25m

ORD9:00 amChicago O'Hare Intl

Dec 29

ORD6:00 pmChicago O'Hare Intl

2h 05m

DCA9:05 pmWashington, D.C. Reagan-National

$223

momondo Fare Finder

Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Chicago

DCA Washington, D.C. Reagan-National - ORD Chicago O'Hare Intl

DCAORD

Washington, D.C. Reagan-National

Thu 9/24

6:30 am-7:58 am

Nonstop2h 28m

Chicago O'Hare Intl

Mon 9/28

6:55 pm-10:00 pm

Nonstop2h 05m

$178

Washington, D.C.Chicago

DCA Washington, D.C. Reagan-National - ORD Chicago O'Hare Intl

DCAORD

Washington, D.C. Reagan-National

Thu 10/1

5:00 pm-6:29 pm

Nonstop2h 29m

Chicago O'Hare Intl

Sat 10/31

6:59 am-10:06 am

Nonstop2h 07m

$178

Washington, D.C.Chicago

DCA Washington, D.C. Reagan-National - ORD Chicago O'Hare Intl

DCAORD

Washington, D.C. Reagan-National

Mon 9/28

7:00 am-12:23 am

1 stop18h 23m

Chicago O'Hare Intl

Wed 9/30

6:30 am-9:59 pm

1 stop14h 29m

$182

Washington, D.C.Chicago

DCA Washington, D.C. Reagan-National - MDW Chicago Midway

DCAMDW

Washington, D.C. Reagan-National

Wed 11/11

2:40 pm-5:45 pm

1 stop4h 05m

Chicago Midway

Sat 11/14

11:05 am-1:55 pm

Nonstop1h 50m

$183

Washington, D.C.Chicago

DCA Washington, D.C. Reagan-National - MDW Chicago Midway

DCAMDW

Washington, D.C. Reagan-National

Tue 11/3

2:40 pm-5:45 pm

1 stop4h 05m

Chicago Midway

Thu 11/5

12:25 pm-3:15 pm

Nonstop1h 50m

$183

Washington, D.C.Chicago

DCA Washington, D.C. Reagan-National - MDW Chicago Midway

DCAMDW

Washington, D.C. Reagan-National

Tue 9/29

6:10 am-9:07 am

1 stop3h 57m

Chicago Midway

Sat 10/3

4:30 pm-11:44 pm

1 stop6h 14m

$184

Washington, D.C.Chicago

DCA Washington, D.C. Reagan-National - ORD Chicago O'Hare Intl

DCAORD

Washington, D.C. Reagan-National

Fri 10/23

7:00 am-12:24 am

1 stop18h 24m

Chicago O'Hare Intl

Mon 11/2

6:30 am-9:50 pm

1 stop14h 20m

$187

Washington, D.C.Chicago

DCA Washington, D.C. Reagan-National - ORD Chicago O'Hare Intl

DCAORD

Washington, D.C. Reagan-National

Tue 9/29

11:57 am-1:13 pm

Nonstop2h 16m

Chicago O'Hare Intl

Fri 10/30

5:00 am-12:29 pm

1 stop6h 29m

$190

Washington, D.C.Chicago

DCA Washington, D.C. Reagan-National - MDW Chicago Midway

DCAMDW

Washington, D.C. Reagan-National

Tue 9/22

9:40 am-12:39 pm

1 stop3h 59m

Chicago Midway

Wed 9/23

1:00 pm-8:37 pm

1 stop6h 37m

$194

Quickest round-trip

Washington, D.C.Chicago

DCA Washington, D.C. Reagan-National - ORD Chicago O'Hare Intl

DCAORD

Washington, D.C. Reagan-National

Tue 12/22

7:35 am-9:00 am

Nonstop2h 25m

Chicago O'Hare Intl

Tue 12/29

4:59 pm-8:04 pm

Nonstop2h 05m

$205

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Washington, D.C. Reagan-National Airport to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Washington, D.C. Reagan-National Airport is in February. Flight prices, which tend to average around $314, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of February, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $316.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Washington, D.C. Reagan-National Airport to Illinois is on a Saturday when prices can be found for as low as $395. Flights from Washington, D.C. Reagan-National Airport to Illinois on a Sunday will generally be more expensive and average around $518. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the evening. Flights from Washington, D.C. Reagan-National Airport to Illinois during this time can be as low as $406. Flights in the afternoon are often more expensive with an average ticket price of $441.

What is the cheapest Washington, D.C. Reagan-National to Illinois flight route?

Fly from Washington, D.C. Reagan-National to Chicago Midway for the best Washington, D.C. Reagan-National - Illinois flight prices

How far in advance should I book a flight from Washington, D.C. Reagan-National Airport to Illinois?

You are more likely to see cheaper flights to Illinois from Washington, D.C. Reagan-National Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $358 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Washington, D.C. Reagan-National Airport for as low as $277 on momondo.

What cabin class options are available on Washington, D.C. Reagan-National Airport to Illinois flights?

There are 4 cabin classes available to choose from on Washington, D.C. Reagan-National Airport to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Washington, D.C. Reagan-National Airport to Illinois flights?

No. A direct flight is the cheapest option for a flight between Washington, D.C. Reagan-National Airport to Illinois.

Cheap Washington, D.C. Reagan-National Airport to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Reagan-National Airport to Illinois

Best Price Found	$89
Fastest flight time	1h 55m
Direct flights	Every day
Airports in Illinois	98 airports

The best one-way flight to Illinois from Washington, D.C. Reagan-National Airport in the past 72 hours is $89. The best round-trip flight deal from Washington, D.C. Reagan-National Airport to Illinois found on momondo in the last 72 hours is $178.

The fastest flight from Washington, D.C. Reagan-National Airport to Illinois takes 1h 55m

Direct flights go from Washington, D.C. Reagan-National Airport to Illinois every day.

There are 98 airports in Illinois. From Washington, D.C. Reagan-National Airport there are direct flights to Chicago O'Hare Intl (ORD), Chicago Midway (MDW).

Search flight deals

Frequently asked questions about flying from Washington, D.C. Reagan-National Airport to Illinois

When did momondo last update prices for flights from Washington, D.C. Reagan-National Airport to Illinois?
Prices for flights from Washington, D.C. Reagan-National Airport to Illinois refresh daily.
How many operators does momondo search for flights from Washington, D.C. Reagan-National Airport to Illinois?
As of August 2026, there are 4 operators available to choose from for flights from Washington, D.C. Reagan-National Airport to Illinois.
How old do you have to be to fly from Washington, D.C. Reagan-National Airport to Illinois?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. Reagan-National Airport to Illinois.
What documentation or ID do you need to fly to Illinois?
The travel and health documents required for your trip to Illinois can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from Washington, D.C. Reagan-National Airport to Illinois?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Washington, D.C. Reagan-National Airport to Illinois is Boeing 737 MAX 8 (15.42% of total bookings). The next most popular plane models are Boeing 737-800 (13.73%), Airbus A320-100/200 (11.97%), and Airbus A319 (10.92%).

Best airlines flying from Washington, D.C. Reagan-National Airport to Illinois

Compare and see reviews for airlines that fly from Washington, D.C. Reagan-National Airport to Illinois with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $29	Free Cancellation	Rating 5.6 2,644 reviews	Search Frontier flights
American Airlines	PriceFrom $198	Free Cancellation	Rating 7.1 12,011 reviews	Search American Airlines flights
United Airlines	PriceFrom $224	Free Cancellation	Rating 7.4 10,127 reviews	Search United Airlines flights
Southwest	PriceFrom $227	Free Cancellation	Rating 8.0 4,203 reviews	Search Southwest flights

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Illinois?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Illinois from Washington, D.C..

Can I find flights from Washington, D.C. to Illinois with flexible booking policies on momondo?

Flights from Washington, D.C. to Illinois with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Washington, D.C. to Illinois?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Washington, D.C. to Illinois.

I’m not ready to book a flight from Washington, D.C. to Illinois right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Illinois from Washington, D.C.. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Illinois trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Start using Trips

Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

1 adult

Sat 9/26

Sat 10/3

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Illinois

Popular cities

Other flights from Washington, D.C. Reagan-National Airport

Other flights to Illinois

Airlines

Complete your trip

Feeling lucky

Popular cities in Illinois

Flights to New Yorkfrom $75

Flights to Los Angelesfrom $39

Flights to Orlandofrom $55

Flights to Miamifrom $79

Flights to San Franciscofrom $39

Flights to Chicagofrom $50

Flights to Las Vegasfrom $39

Flights to Washington, D.C.from $67

Flights to Bostonfrom $88

Flights to Fort Lauderdalefrom $63

Flights to Atlantafrom $38

Flights to Dallasfrom $55

Cheap flights from Washington, D.C. Reagan-National Airport to Illinois from $89

Find the cheapest flights from Washington, D.C. Reagan-National Airport to Illinois

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Frontier flights from Washington, D.C. Reagan-National Airport to Illinois

Our best Frontier deals on Washington, D.C. Reagan-National Airport to Illinois flight tickets

United Airlines flights from Washington, D.C. Reagan-National Airport to Illinois

Our best United Airlines deals on Washington, D.C. Reagan-National Airport to Illinois flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport to Illinois that are best for you.

See travel insights to Illinois from

How to get the cheapest flight ticket from Washington, D.C. Reagan-National Airport to Illinois

What is the cheapest month to fly to Illinois?

What is the cheapest day to depart on your flight to Illinois?

What is the cheapest time of day to depart on your flight to Illinois?

What is the cheapest Washington, D.C. Reagan-National to Illinois flight route?

How far in advance should I book a flight from Washington, D.C. Reagan-National Airport to Illinois?

What cabin class options are available on Washington, D.C. Reagan-National Airport to Illinois flights?

Can stopping save me money on Washington, D.C. Reagan-National Airport to Illinois flights?

What is the cheapest airline that flies from Washington, D.C. Reagan-National to Illinois?

What airlines fly to Illinois?

How many flights depart from Washington, D.C. Reagan-National Airport to Illinois on average per day?

How many flights depart from Washington, D.C. Reagan-National Airport to Illinois on average per week?

Cheap Washington, D.C. Reagan-National Airport to Illinois flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Airports in Illinois

Frequently asked questions about flying from Washington, D.C. Reagan-National Airport to Illinois

Best airlines flying from Washington, D.C. Reagan-National Airport to Illinois

Compare and see reviews for airlines that fly from Washington, D.C. Reagan-National Airport to Illinois with momondo

Why use momondo?

An easier way to manage your Illinois trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Illinois

Popular cities in Illinois

Popular flights according to clicks in the last 7 days on momondo

Washington, D.C. Reagan-National Airport flight routes

According to popular flight searches on momondo this year

Illinois flight routes

According to popular flight searches on momondo this year

Fly your favorite airline to Illinois

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Complete your trip to Illinois

Explore popular destinations other users love

According to popular flight searches on momondo this year