What airlines fly to Illinois?

American Airlines, United 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. American Airlines is the first choice among our users, with 49% 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?

JetBlue, Frontier, 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 September 2025, there are 5 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.

$84 Cheap Flights from Washington, D.C. Reagan-National Airport to Illinois in 2025/26

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

As of September 2025, 55 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 43% of daily flights taking off in the afternoon.

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

391 flights are operational weekly from Washington, D.C. Reagan-National Airport to Illinois as of September 2025. The most popular departure day for this route is Mon, with 16% of flights per week taking off on this day.

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

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

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

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

8:15 am - 12:15 amDCA-ORD

17h 00m1 stop

6:00 am - 9:59 pmORD-DCA

14h 59m1 stop

$171Frontier

Find Deal

Thu, Nov 6 - Mon, Nov 10

1:00 pm - 12:15 amDCA-ORD

12h 15m1 stop

6:00 am - 9:59 pmORD-DCA

14h 59m1 stop

$172Frontier

Find Deal

Thu, Nov 6 - Mon, Nov 10

6:25 am - 12:22 pmDCA-ORD

6h 57m1 stop

1:35 pm - 10:56 pmORD-DCA

8h 21m1 stop

$203JetBlue

Find Deal

Tue, Oct 21 - Wed, Oct 22

6:25 am - 12:22 pmDCA-ORD

6h 57m1 stop

7:00 am - 2:50 pmORD-DCA

6h 50m1 stop

$207JetBlue

Find Deal

Tue, Oct 21 - Tue, Oct 28

8:30 am - 12:39 pmDCA-PIA

5h 09m1 stop

3:30 pm - 8:55 pmPIA-DCA

4h 25m1 stop

$249United Airlines

Find Deal

Wed, Nov 5 - Sat, Nov 8

10:55 am - 2:38 pmDCA-PIA

4h 43m1 stop

10:25 am - 4:14 pmPIA-DCA

4h 49m1 stop

$254American Airlines

Find Deal

Fri, Oct 31 - Thu, Nov 6

6:25 am - 7:39 amDCA-ORD

2h 14mnonstop

7:40 pm - 10:43 pmORD-DCA

2h 03mnonstop

$257United Airlines

Find Deal

Sat, Oct 18 - Sat, Oct 18

6:00 am - 7:00 amDCA-MDW

2h 00mnonstop

12:25 pm - 3:15 pmMDW-DCA

1h 50mnonstop

$257Southwest

Find Deal

Sat, Oct 18 - Sat, Oct 18

7:59 pm - 9:23 pmDCA-ORD

2h 24mnonstop

11:40 am - 2:24 pmORD-DCA

1h 44mnonstop

$259American Airlines

Find Deal

Wed, Nov 5 - Wed, Nov 12

6:45 pm - 7:45 pmDCA-MDW

2h 00mnonstop

6:10 am - 8:55 amMDW-DCA

1h 45mnonstop

$261Southwest

Find Deal

Sat, Oct 18 - Mon, Oct 20

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

Nov 6

DCA8:15 amWashington, D.C. Reagan-National

17h 00m

1 stop

ORD12:15 amChicago O'Hare Intl

Nov 10

ORD6:00 amChicago O'Hare Intl

14h 59m

1 stop

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

$171

Find similar

Frontier

Nov 6

DCA1:00 pmWashington, D.C. Reagan-National

12h 15m

1 stop

ORD12:15 amChicago O'Hare Intl

Nov 10

ORD6:00 amChicago O'Hare Intl

14h 59m

1 stop

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

$172

Find similar

Frontier

Oct 6

DCA1:00 pmWashington, D.C. Reagan-National

11h 59m

1 stop

ORD11:59 pmChicago O'Hare Intl

Oct 15

ORD7:15 amChicago O'Hare Intl

13h 44m

1 stop

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

$173

Find similar

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

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

JetBlue

Oct 21

DCA6:25 amWashington, D.C. Reagan-National

6h 57m

1 stop

ORD12:22 pmChicago O'Hare Intl

Oct 22

ORD1:35 pmChicago O'Hare Intl

8h 21m

1 stop

DCA10:56 pmWashington, D.C. Reagan-National

$203

Find similar

JetBlue

Oct 21

DCA6:25 amWashington, D.C. Reagan-National

6h 57m

1 stop

ORD12:22 pmChicago O'Hare Intl

Oct 28

ORD7:00 amChicago O'Hare Intl

6h 50m

1 stop

DCA2:50 pmWashington, D.C. Reagan-National

$207

Find similar

JetBlue

Oct 28

DCA4:55 pmWashington, D.C. Reagan-National

4h 57m

1 stop

ORD8:52 pmChicago O'Hare Intl

Oct 30

ORD6:45 amChicago O'Hare Intl

7h 05m

1 stop

DCA2:50 pmWashington, D.C. Reagan-National

$208

Find similar

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

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Thu 11/6

8:15 am-12:15 am

1 stop17h 00m

Chicago O'Hare Intl

Mon 11/10

6:00 am-9:59 pm

1 stop14h 59m

$171

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Thu 11/6

1:00 pm-12:15 am

1 stop12h 15m

Chicago O'Hare Intl

Mon 11/10

6:00 am-9:59 pm

1 stop14h 59m

$172

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Tue 10/21

6:25 am-12:22 pm

1 stop6h 57m

Chicago O'Hare Intl

Wed 10/22

1:35 pm-10:56 pm

1 stop8h 21m

$203

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Tue 10/21

6:25 am-12:22 pm

1 stop6h 57m

Chicago O'Hare Intl

Tue 10/28

7:00 am-2:50 pm

1 stop6h 50m

$207

Washington, D.C.Peoria

DCA - PIA

DCAPIA

Washington, D.C. Reagan-National

Wed 11/5

8:30 am-12:39 pm

1 stop5h 09m

Greater Peoria

Sat 11/8

3:30 pm-8:55 pm

1 stop4h 25m

$249

Washington, D.C.Peoria

DCA - PIA

DCAPIA

Washington, D.C. Reagan-National

Fri 10/31

10:55 am-2:38 pm

1 stop4h 43m

Greater Peoria

Thu 11/6

10:25 am-4:14 pm

1 stop4h 49m

$254

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Sat 10/18

6:25 am-7:39 am

Nonstop2h 14m

Chicago O'Hare Intl

Sat 10/18

7:40 pm-10:43 pm

Nonstop2h 03m

$257

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

Sat 10/18

6:00 am-7:00 am

Nonstop2h 00m

Chicago Midway

Sat 10/18

12:25 pm-3:15 pm

Nonstop1h 50m

$257

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Wed 11/5

7:59 pm-9:23 pm

Nonstop2h 24m

Chicago O'Hare Intl

Wed 11/12

11:40 am-2:24 pm

Nonstop1h 44m

$259

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

Sat 10/18

6:45 pm-7:45 pm

Nonstop2h 00m

Chicago Midway

Mon 10/20

6:10 am-8:55 am

Nonstop1h 45m

$261

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 $270, 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 May is also cheap. Prices for this month can be found on momondo for an average of $273.

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 Friday when prices can be found for as low as $380. Flights from Washington, D.C. Reagan-National Airport to Illinois on a Sunday will generally be more expensive and average around $495. 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 $344. Flights at noon are often more expensive with an average ticket price of $432.

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 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 $310 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 $243 on momondo.

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

There are 4 cabin classes available to choose from on Washington, D.C. Reagan-National 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	$148
Fastest flight time	1h 55m
Direct flights	Every day
Airports in Illinois	2 airports

The best one-way flight to Illinois from Washington, D.C. Reagan-National Airport in the past 72 hours is $148. The best round-trip flight deal from Washington, D.C. Reagan-National Airport to Illinois found on momondo in the last 72 hours is $266.

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 2 airports near Illinois: Chicago O'Hare Intl (ORD), Chicago Midway (MDW)

Search flight deals

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 September 2025, there are 5 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 737-800 (14.46% of total bookings). The next most popular plane models are Airbus A320-100/200 (12.31%), Airbus A319 (11.95%), and Boeing 737 MAX 8 (8.50%).

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 $99	Free Cancellation	Rating 5.8 3,166 reviews	Search Frontier flights
American Airlines	PriceFrom $154	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Southwest	PriceFrom $178	Free Cancellation	Rating 8.0 4,244 reviews	Search Southwest flights
United Airlines	PriceFrom $189	Free Cancellation	Rating 7.4 8,922 reviews	Search United Airlines 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

Wed 10/22

Wed 10/29

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 in Illinois

Flights to New Yorkfrom $50

Flights to Los Angelesfrom $44

Flights to Miamifrom $49

Flights to Chicagofrom $60

Flights to Orlandofrom $56

Flights to Las Vegasfrom $44

Flights to San Franciscofrom $60

Flights to Washington, D.C.from $56

Flights to Bostonfrom $67

Flights to Atlantafrom $51

Flights to Dallasfrom $59

Flights to Seattlefrom $102

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

Flights from Washington, D.C. Reagan-National to Denver Intl

Flights from Washington, D.C. Reagan-National to Orlando

Flights from Washington, D.C. Reagan-National to Fort Lauderdale

Flights from Washington, D.C. Reagan-National to Columbus

Flights from Washington, D.C. Reagan-National to Boston Logan Intl

Flights from Washington, D.C. Reagan-National to Omaha Eppley Airfield

Cheap flights from Washington, D.C. Reagan-National Airport to Illinois from $84

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

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

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

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

Our best JetBlue 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

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

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?

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 $344. Flights at noon are often more expensive with an average ticket price of $432.

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 to Illinois?

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

There are 4 cabin classes available to choose from on Washington, D.C. Reagan-National 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.

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

JetBlue, Frontier, and Southwest are the most popular carriers operating 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?

As of September 2025, 55 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 43% of daily flights taking off in the afternoon.

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

391 flights are operational weekly from Washington, D.C. Reagan-National Airport to Illinois as of September 2025. The most popular departure day for this route is Mon, with 16% of flights per week taking off on this day.

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

Fastest flight time

Direct flights

Airports in Illinois

When did momondo last update prices for flights from Washington, D.C. Reagan-National Airport to Illinois?

How many operators does momondo search 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?

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

What is the most popular plane model 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?

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

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

How can momondo help me find flights 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?

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