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

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

What airlines fly to Washington, D.C. Reagan-National Airport?

United Airlines, American Airlines and Southwest are the top three most popular airlines that fly to Washington, D.C. Reagan-National Airport from Illinois according to our data. United Airlines is the first choice among our users, with 49% of people opting to fly with this airline when traveling to Washington, D.C. Reagan-National Airport. Keep in mind that there are 5 different airlines that fly to Washington, D.C. Reagan-National Airport on a routine basis, so you have a few additional options to choose from.

How long does it take to fly to Washington, D.C. Reagan-National Airport?

Flight times from Illinois to Washington, D.C. Reagan-National Airport vary, but if you’re flying out of Chicago and flying into Washington, D.C. Dulles Intl Airport (one of the most popular routes), then the duration is 2h 34m on average. Another popular route from Illinois to Washington, D.C. Reagan-National Airport is flying from Peoria to Washington, D.C. Dulles Intl Airport, which will take roughly 4h 22m. Keep in mind that layovers or delays could extend your travel time.

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

Prices for flights from Illinois to Washington, D.C. Reagan-National Airport are refreshed on a daily basis.

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

As of April 2026, there are 5 operators available to choose from for flights from Illinois to Washington, D.C. Reagan-National Airport.

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

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Illinois to Washington, D.C. Reagan-National Airport.

What documentation or ID do you need to fly to Washington, D.C. Reagan-National Airport?

The required travel and health documents for your Washington, D.C. Reagan-National Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington, D.C. Reagan-National Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$76 Cheap Flights from Illinois to Washington, D.C. Reagan-National Airport in 2026

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

As of April 2026, there are 393 flights per week flying from Illinois to Washington, D.C. Reagan-National Airport. The most common day of the week flights depart is Fri, with 17% of flights taking off on this day.

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

As of April 2026, 56 flights take off from Illinois and land in Washington, D.C. Reagan-National Airport each day. The most common flight departure time for this route is 7:00PM, with 44% of daily flights taking off at noon.

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Illinois to Washington, D.C.

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

9:37 pm - 12:59 pm

ORD

DCA

14h 22m

1 stop

7:00 am - 8:32 pm

DCA

ORD

14h 32m

1 stop

$210Frontier

Fri, May 22 - Sun, May 24

9:37 pm - 9:58 pm

ORD

DCA

23h 21m

1 stop

1:59 pm - 8:32 pm

DCA

ORD

7h 33m

1 stop

$212Frontier

Thu, May 7 - Mon, May 11

2:45 pm - 8:59 pm

ORD

DCA

5h 14m

1 stop

6:05 am - 8:45 am

DCA

ORD

3h 40m

1 stop

$213Delta

Tue, May 26 - Sat, May 30

6:05 am - 8:55 am

MDW

DCA

1h 50mnonstop

2:45 pm - 5:50 pm

DCA

MDW

4h 05m

1 stop

$214Southwest

Tue, May 26 - Mon, Jun 1

8:30 am - 11:20 am

MDW

DCA

1h 50mnonstop

11:35 am - 6:15 pm

DCA

MDW

7h 40m

1 stop

$218Southwest

Sat, May 9 - Tue, May 12

6:08 am - 9:05 am

ORD

DCA

1h 57mnonstop

5:00 am - 8:30 am

DCA

ORD

4h 30m

1 stop

$218American Airlines

Wed, May 13 - Thu, May 14

1:16 pm - 6:59 pm

MDW

DCA

4h 43m

1 stop

6:00 am - 9:08 am

DCA

MDW

4h 08m

1 stop

$242Delta

Sat, Jun 20 - Sat, Jul 18

6:00 am - 9:15 am

STL

DCA

2h 15mnonstop

8:41 pm - 10:07 pm

DCA

STL

2h 26mnonstop

$255American Airlines

Thu, May 7 - Mon, May 11

1:15 pm - 8:10 pm

MLI

DCA

5h 55m

1 stop

1:00 pm - 5:52 pm

DCA

MLI

5h 52m

1 stop

$261United Airlines

Wed, Jun 3 - Sat, Jun 6

2:29 pm - 8:10 pm

MLI

DCA

4h 41m

1 stop

9:30 am - 12:58 pm

DCA

MLI

4h 28m

1 stop

$276United Airlines

Mon, Aug 31 - Tue, Sep 8

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

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

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

Southwest

May 26

MDW6:05 amChicago Midway

1h 50m

DCA8:55 amWashington, D.C. Reagan-National

Jun 1

DCA2:45 pmWashington, D.C. Reagan-National

4h 05m

1 stop

MDW5:50 pmChicago Midway

$214

Southwest

May 9

MDW8:30 amChicago Midway

1h 50m

DCA11:20 amWashington, D.C. Reagan-National

May 12

DCA11:35 amWashington, D.C. Reagan-National

7h 40m

1 stop

MDW6:15 pmChicago Midway

$218

Southwest

May 5

MDW1:55 pmChicago Midway

3h 45m

1 stop

DCA6:40 pmWashington, D.C. Reagan-National

May 7

DCA4:00 pmWashington, D.C. Reagan-National

5h 35m

1 stop

MDW8:35 pmChicago Midway

$223

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

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

Frontier

May 22

ORD9:37 pmChicago O'Hare Intl

14h 22m

1 stop

DCA12:59 pmWashington, D.C. Reagan-National

May 24

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

14h 32m

1 stop

ORD8:32 pmChicago O'Hare Intl

$210

Frontier

May 7

ORD9:37 pmChicago O'Hare Intl

23h 21m

1 stop

DCA9:58 pmWashington, D.C. Reagan-National

May 11

DCA1:59 pmWashington, D.C. Reagan-National

7h 33m

1 stop

ORD8:32 pmChicago O'Hare Intl

$212

Frontier

May 3

ORD10:50 amChicago O'Hare Intl

10h 09m

1 stop

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

May 9

DCA1:59 pmWashington, D.C. Reagan-National

7h 33m

1 stop

ORD8:32 pmChicago O'Hare Intl

$215

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoWashington, D.C.

ORD - DCA

ORDDCA

Chicago O'Hare Intl

Fri 5/22

9:37 pm-12:59 pm

1 stop14h 22m

Washington, D.C. Reagan-National

Sun 5/24

7:00 am-8:32 pm

1 stop14h 32m

$210

ChicagoWashington, D.C.

ORD - DCA

ORDDCA

Chicago O'Hare Intl

Thu 5/7

9:37 pm-9:58 pm

1 stop23h 21m

Washington, D.C. Reagan-National

Mon 5/11

1:59 pm-8:32 pm

1 stop7h 33m

$212

ChicagoWashington, D.C.

ORD - DCA

ORDDCA

Chicago O'Hare Intl

Tue 5/26

2:45 pm-8:59 pm

1 stop5h 14m

Washington, D.C. Reagan-National

Sat 5/30

6:05 am-8:45 am

1 stop3h 40m

$213

ChicagoWashington, D.C.

MDW - DCA

MDWDCA

Chicago Midway

Tue 5/26

6:05 am-8:55 am

Nonstop1h 50m

Washington, D.C. Reagan-National

Mon 6/1

2:45 pm-5:50 pm

1 stop4h 05m

$214

ChicagoWashington, D.C.

MDW - DCA

MDWDCA

Chicago Midway

Sat 5/9

8:30 am-11:20 am

Nonstop1h 50m

Washington, D.C. Reagan-National

Tue 5/12

11:35 am-6:15 pm

1 stop7h 40m

$218

ChicagoWashington, D.C.

ORD - DCA

ORDDCA

Chicago O'Hare Intl

Wed 5/13

6:08 am-9:05 am

Nonstop1h 57m

Washington, D.C. Reagan-National

Thu 5/14

5:00 am-8:30 am

1 stop4h 30m

$218

ChicagoWashington, D.C.

MDW - DCA

MDWDCA

Chicago Midway

Sat 6/20

1:16 pm-6:59 pm

1 stop4h 43m

Washington, D.C. Reagan-National

Sat 7/18

6:00 am-9:08 am

1 stop4h 08m

$242

Quickest round-trip

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Thu 5/7

6:00 am-9:15 am

Nonstop2h 15m

Washington, D.C. Reagan-National

Mon 5/11

8:41 pm-10:07 pm

Nonstop2h 26m

$255

MolineWashington, D.C.

MLI - DCA

MLIDCA

Moline Quad-City

Wed 6/3

1:15 pm-8:10 pm

1 stop5h 55m

Washington, D.C. Reagan-National

Sat 6/6

1:00 pm-5:52 pm

1 stop5h 52m

$261

MolineWashington, D.C.

MLI - DCA

MLIDCA

Moline Quad-City

Mon 8/31

2:29 pm-8:10 pm

1 stop4h 41m

Washington, D.C. Reagan-National

Tue 9/8

9:30 am-12:58 pm

1 stop4h 28m

$276

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 Illinois to Washington, D.C. Reagan-National Airport

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 Washington, D.C. Reagan-National Airport?

The month of August is, on average, the cheapest month to fly to Washington, D.C. Reagan-National Airport from Illinois, with most prices found around $263. If you aren’t able to travel to Washington, D.C. Reagan-National Airport during the month of August, then flying in July is also cheap. Prices for this month can be found on momondo for an average of $268.

What is the cheapest day to depart on your flight to Washington, D.C. Reagan-National Airport?

The cheapest day to depart from Illinois to Washington, D.C. Reagan-National Airport is on a Thursday. Travelers who choose to depart for Washington, D.C. Reagan-National Airport on a Thursday will often find tickets for as low as $303. Flights from Illinois to Washington, D.C. Reagan-National Airport on a Monday will generally be more expensive and average around $440. 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 Washington, D.C. Reagan-National Airport?

Our data shows that the cheapest Illinois to Washington, D.C. Reagan-National Airport flights are usually those with departure times at noon. Our users have found flights to Washington, D.C. Reagan-National Airport at noon for as low as $326. In contrast, the most expensive time of day to depart to Washington, D.C. Reagan-National Airport is in the afternoon when prices are around $373.

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

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

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

You are more likely to see cheaper flights to Washington, D.C. Reagan-National Airport from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. Reagan-National Airport for around $339 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. Reagan-National Airport from Illinois for as low as $187 on momondo.

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

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

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

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

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

Best Price Found	$218
Fastest flight time	1h 43m
Direct flights	Every day

The best one-way flight to Washington, D.C. Reagan-National Airport from Illinois in the past 72 hours is $218. The best round-trip flight deal from Illinois to Washington, D.C. Reagan-National Airport found on momondo in the last 72 hours is $253.

The fastest flight from Illinois to Washington, D.C. Reagan-National Airport takes 1h 43m

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

Search flight deals

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

When did momondo last update prices for flights from Illinois to Washington, D.C. Reagan-National Airport?
Prices for flights from Illinois to Washington, D.C. Reagan-National Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Illinois to Washington, D.C. Reagan-National Airport?
As of April 2026, there are 5 operators available to choose from for flights from Illinois to Washington, D.C. Reagan-National Airport.
How old do you have to be to fly from Illinois to Washington, D.C. Reagan-National Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Illinois to Washington, D.C. Reagan-National Airport.
What documentation or ID do you need to fly to Washington, D.C. Reagan-National Airport?
The required travel and health documents for your Washington, D.C. Reagan-National Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington, D.C. Reagan-National Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Illinois to Washington, D.C. Reagan-National Airport?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Illinois to Washington, D.C. Reagan-National Airport is Airbus A319 (20.19% of total bookings). The next most popular plane models are Boeing 737-800 (17.97%), Boeing 737-700 (9.61%), and Boeing 737 MAX 8 (9.46%).

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

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

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $85	Free Cancellation	Rating 5.7 2,984 reviews	Search Frontier flights
JetBlue	PriceFrom $141	Free Cancellation	Rating 7.2 2,946 reviews	Search JetBlue flights
American Airlines	PriceFrom $167	Free Cancellation	Rating 7.1 11,621 reviews	Search American Airlines flights
Southwest	PriceFrom $197	Free Cancellation	Rating 8.0 4,329 reviews	Search Southwest flights
United Airlines	PriceFrom $218	Free Cancellation	Rating 7.4 9,603 reviews	Search United Airlines flights

Alexandria

National Harbor

Gettysburg

Arlington

Waldorf

Woodbridge

Laurel

Colonial Beach

Gaithersburg

Towson

Fredericksburg

Silver Spring

Rockville

Manassas

Tysons

Linthicum Heights

Bethesda

Fairfax

Springfield

College Park

Why use momondo?

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

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 Washington, D.C. from Illinois.

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

momondo does allow users to show only those flights to Washington, D.C. from Illinois which offer a flexible booking policy as well as other useful filters and features.

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

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 Illinois to Washington, D.C..

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

If you are not ready to book a flight from Illinois to Washington, D.C. now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Washington, D.C. and let you know when they change.

An easier way to manage your Washington, D.C. Reagan-National Airport 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 5/19

Tue 5/26

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 Washington, D.C.

Popular cities

Other flights from Illinois

Other flights to Washington, D.C.

Airlines

Cabin classes

Complete your trip

Feeling lucky

Popular cities in the United States

Flights to New York John F Kennedy Intl Airportfrom $92

Flights to Newark Airportfrom $56

Flights to New York LaGuardia Airportfrom $56

Flights to Chicago O'Hare Intl Airportfrom $62

Flights to Dallas/Fort Worth Airportfrom $62

Flights to Washington, D.C. Dulles Intl Airportfrom $56

Flights to Orlando Airportfrom $57

Flights to Chicago Midway Airportfrom $72

Flights to Dallas Love Field Airport

Flights to Chicago Greater Rockford Airport

Cheap flights from Illinois to Washington, D.C. from $76

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Washington, D.C. departing on 5/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from Illinois to Washington, D.C.

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

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

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

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

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

momondo Fare Finder

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

See travel insights to Washington, D.C. from

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

What is the cheapest month to fly to Washington, D.C. Reagan-National Airport?

What is the cheapest day to depart on your flight to Washington, D.C. Reagan-National Airport?

What is the cheapest time of day to depart on your flight to Washington, D.C. Reagan-National Airport?

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

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

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

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

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

What airlines fly to Washington, D.C. Reagan-National Airport?

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

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

How long does it take to fly to Washington, D.C. Reagan-National Airport?

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

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

Best Price Found

Fastest flight time

Direct flights

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

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

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

Traveling to a place near Washington, D.C.?

Why use momondo?

An easier way to manage your Washington, D.C. Reagan-National Airport 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 Washington, D.C.

Popular cities in the United States

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

Illinois flight routes

According to popular flight searches on momondo this year

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

According to popular flight searches on momondo this year

Fly your favorite airline to Washington, D.C.

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

Cabin classes currently available on flights to Washington, D.C.

List of cabin classes available on flights landing in Washington, D.C.. Availability may vary depending on flight origin and airline.

Complete your trip to Washington, D.C.

Explore popular destinations other users love

According to popular flight searches on momondo this year