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 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, Southwest, and American Airlines 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 July 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.

$79 Cheap Flights from Washington, D.C. Reagan-National Airport to Illinois in 2025

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

349 flights are operational weekly from Washington, D.C. Reagan-National Airport to Illinois as of July 2025. The most popular departure day for this route is Thu, with 18% of flights per week taking off on this day.

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

As of July 2025, 49 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 2:00PM, with 48% of daily flights taking off in the afternoon.

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

6:59 am - 8:15 amDCA-ORD

2h 16mnonstop

11:45 am - 2:32 pmORD-DCA

1h 47mnonstop

$152American Airlines

Find Deal

Thu, Aug 14 - Thu, Aug 14

12:00 pm - 1:15 pmDCA-ORD

2h 15mnonstop

6:00 pm - 9:02 pmORD-DCA

2h 02mnonstop

$157United Airlines

Find Deal

Thu, Aug 14 - Thu, Aug 14

9:00 pm - 10:00 pmDCA-MDW

2h 00mnonstop

9:20 am - 12:10 pmMDW-DCA

1h 50mnonstop

$157Southwest

Find Deal

Thu, Aug 14 - Thu, Aug 21

9:48 am - 10:59 amDCA-ORD

2h 11mnonstop

6:10 am - 9:00 amORD-DCA

1h 50mnonstop

$158American Airlines

Find Deal

Sat, Aug 30 - Sat, Sep 6

6:00 am - 6:55 amDCA-MDW

1h 55mnonstop

3:55 pm - 9:45 pmMDW-DCA

4h 50m1 stop

$167Southwest

Find Deal

Thu, Aug 14 - Thu, Aug 14

7:00 pm - 11:37 pmDCA-ORD

5h 37m1 stop

7:00 am - 9:57 amORD-DCA

1h 57mnonstop

$167United Airlines

Find Deal

Sat, Aug 16 - Mon, Aug 18

7:38 pm - 11:56 pmDCA-ORD

5h 18m1 stop

5:00 pm - 10:59 pmORD-DCA

4h 59m1 stop

$197Delta

Find Deal

Mon, Aug 11 - Sat, Aug 16

6:00 am - 8:35 amDCA-MDW

3h 35m1 stop

1:08 pm - 6:52 pmMDW-DCA

4h 44m1 stop

$197Delta

Find Deal

Tue, Aug 12 - Tue, Aug 19

7:00 am - 9:11 amDCA-STL

27h 11m1 stop

7:29 pm - 12:04 pmSTL-DCA

15h 35m1 stop

$255Frontier

Find Deal

Tue, Jul 29 - Wed, Jul 30

7:00 am - 9:11 amDCA-STL

27h 11m1 stop

7:29 pm - 12:04 pmSTL-DCA

15h 35m1 stop

$265Frontier

Find Deal

Tue, Aug 5 - Mon, Aug 11

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

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

American Airlines

Aug 14

DCA6:59 amWashington, D.C. Reagan-National

2h 16m

ORD8:15 amChicago O'Hare Intl

Aug 14

ORD11:45 amChicago O'Hare Intl

1h 47m

DCA2:32 pmWashington, D.C. Reagan-National

$152

Find similar

American Airlines

Aug 30

DCA9:48 amWashington, D.C. Reagan-National

2h 11m

ORD10:59 amChicago O'Hare Intl

Sep 6

ORD6:10 amChicago O'Hare Intl

1h 50m

DCA9:00 amWashington, D.C. Reagan-National

$158

Find similar

American Airlines

Aug 16

DCA2:35 pmWashington, D.C. Reagan-National

2h 13m

ORD3:48 pmChicago O'Hare Intl

Aug 31

ORD6:06 amChicago O'Hare Intl

1h 54m

DCA9:00 amWashington, D.C. Reagan-National

$168

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

Sep 12

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

6h 45m

1 stop

ORD12:10 pmChicago O'Hare Intl

Sep 15

ORD1:36 pmChicago O'Hare Intl

8h 20m

1 stop

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

$208

Find similar

JetBlue

Nov 8

DCA5:45 pmWashington, D.C. Reagan-National

5h 03m

1 stop

ORD9:48 pmChicago O'Hare Intl

Nov 10

ORD6:45 amChicago O'Hare Intl

6h 47m

1 stop

DCA2:32 pmWashington, D.C. Reagan-National

$212

Find similar

JetBlue

Sep 18

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

6h 45m

1 stop

ORD12:10 pmChicago O'Hare Intl

Sep 20

ORD9:42 amChicago O'Hare Intl

7h 18m

1 stop

DCA6:00 pmWashington, D.C. Reagan-National

$218

Find similar

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 September. Flight prices, which tend to average around $263, 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 September, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $267.

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 $383. Flights from Washington, D.C. Reagan-National Airport to Illinois on a Sunday will generally be more expensive and average around $487. 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 $351. Flights at noon are often more expensive with an average ticket price of $424.

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

Fly from Washington, D.C. Reagan-National to Chicago O'Hare Intl 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 $308 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 $242 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	$79
Fastest flight time	1h 55m
Direct flights	Every day
Airports in Illinois	5 airports

The best one-way flight to Illinois from Washington, D.C. Reagan-National Airport in the past 72 hours is $79. The best round-trip flight deal from Washington, D.C. Reagan-National Airport to Illinois found on momondo in the last 72 hours is $152.

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 5 airports near Illinois: Chicago O'Hare Intl (ORD), Chicago Midway (MDW), Greater Peoria (PIA), Lambert-St Louis (STL), Moline Quad-City (MLI)

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 July 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 Airbus A319 (14.05% of total bookings). The next most popular plane models are Boeing 737-800 (13.74%), Airbus A320-100/200 (12.56%), and Boeing 737 MAX 8 (9.58%).

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 $120	Free Cancellation	Rating 5.9 3,251 reviews	Search Frontier flights
American Airlines	PriceFrom $157	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Southwest	PriceFrom $177	Free Cancellation	Rating 8.0 4,238 reviews	Search Southwest flights
United Airlines	PriceFrom $189	Free Cancellation	Rating 7.4 8,864 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

Tue 7/22

Tue 7/29

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 $38

Flights to Los Angelesfrom $40

Flights to Miamifrom $37

Flights to Chicagofrom $48

Flights to Las Vegasfrom $47

Flights to Orlandofrom $68

Flights to San Franciscofrom $57

Flights to Washington, D.C.from $50

Flights to Bostonfrom $61

Flights to Dallasfrom $63

Flights to Atlantafrom $49

Flights to Seattlefrom $88

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

Washington, D.C. Reagan-National to Orlando

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

Washington, D.C. Reagan-National to New York LaGuardia

Washington, D.C. Reagan-National to Traverse City Cherry Capital

Washington, D.C. Reagan-National to Norfolk

Washington, D.C. Reagan-National to Dallas Love Field

Cheap flights from Washington, D.C. Reagan-National Airport to Illinois from $79

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

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

Our best American Airlines 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

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 $351. Flights at noon are often more expensive with an average ticket price of $424.

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

Fly from Washington, D.C. Reagan-National to Chicago O'Hare Intl 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?

United Airlines, Southwest, and American Airlines 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 July 2025, 49 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 2:00PM, with 48% 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?

349 flights are operational weekly from Washington, D.C. Reagan-National Airport to Illinois as of July 2025. The most popular departure day for this route is Thu, with 18% 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