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Washington, D.C.

$54+ Cheap flights from Illinois to Washington, D.C. (WAS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/11. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — WAS
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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Cheap flight deals from Illinois to Washington, D.C.

Cheapest flights from Illinois to Washington, D.C.
Explore the most affordable flight options available from Illinois to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 29, 2026.

This Expedia deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/16:05 pm
ORD
-
BWI
Nonstop2h 09m
Frontier
Thu 3/59:19 am
BWI
-
ORD
Nonstop2h 27m
Frontier
Deal found 1/28$87
This CheapOair deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/258:16 pm
ORD
-
BWI
1 stop11h 50m
Spirit Airlines
Wed 3/412:30 pm
BWI
-
ORD
1 stop12h 17m
Spirit Airlines
Deal found 1/27$90
This Kiwi.com deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/265:15 am
ORD
-
BWI
Nonstop2h 09m
Frontier
Fri 2/276:08 pm
BWI
-
ORD
1 stop17h 43m
Frontier
Deal found 1/27$91
This Frontier deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/1811:51 am
ORD
-
BWI
1 stop11h 40m
Frontier
Thu 2/269:19 am
BWI
-
ORD
Nonstop2h 27m
Frontier
Deal found 1/27$92
This Expedia deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/193:15 pm
ORD
-
BWI
Nonstop2h 09m
Multiple Airlines
Thu 2/2612:30 pm
BWI
-
ORD
1 stop9h 43m
Multiple Airlines
Deal found 1/28$95
This Expedia deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/248:16 pm
ORD
-
BWI
1 stop11h 50m
Spirit Airlines
Tue 3/312:30 pm
BWI
-
ORD
1 stop12h 17m
Spirit Airlines
Deal found 1/27$98
This Frontier deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/193:15 pm
ORD
-
BWI
Nonstop2h 09m
Frontier
Mon 2/232:58 pm
BWI
-
ORD
1 stop9h 17m
Frontier
Deal found 1/27$102
This Frontier deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/284:42 pm
ORD
-
BWI
1 stop6h 54m
Frontier
Sun 3/19:59 pm
BWI
-
ORD
Nonstop2h 27m
Frontier
Deal found 1/26$103
This Kiwi.com deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/1711:51 am
ORD
-
BWI
1 stop11h 40m
Frontier
Thu 2/269:19 am
BWI
-
ORD
Nonstop2h 27m
Frontier
Deal found 1/27$105
This Gotogate deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/265:15 am
ORD
-
BWI
1 stop12h 46m
Multiple Airlines
Sun 3/19:59 pm
BWI
-
ORD
Nonstop2h 27m
Multiple Airlines
Deal found 1/28$106
This Kiwi.com deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/174:43 pm
ORD
-
BWI
1 stop15h 23m
Multiple Airlines
Thu 2/197:19 pm
BWI
-
ORD
Nonstop2h 27m
Multiple Airlines
Deal found 1/27$107
This Expedia deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/257:00 am
MDW
-
BWI
1 stop9h 47m
Frontier
Wed 3/48:25 pm
BWI
-
MDW
1 stop19h 01m
Frontier
Deal found 1/28$128

Find flight deals from Illinois to Washington, D.C.

Keep the following information in mind while searching for Illinois to Washington, D.C. flight deals. Data was last updated January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$87
(Expedia)

One-way from

$54
(Trip.com)

Popular in

November

Cheapest in

August

Average price

$288

Good round-trip deal

$150 or less

Good one-way deal

$74 or less
Provider with most accurate pricing for Chicago (CHI)-Washington, D.C. (WAS) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Washington, D.C. (WAS) flights.
Search Deals
From Illinois to Washington, D.C. (WAS)
Search Deals
One-way flight from Illinois to Washington, D.C. (WAS)
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($23 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals
Price to beat on a round-trip flight from Illinois to Washington, D.C. (WAS).
Search Deals
Price to beat on a one-way flight from Illinois to Washington, D.C. (WAS).
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Washington, D.C. that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 29, 2026.
Use the filters below to find and compare flights from Illinois to Washington, D.C. that are best for you.

Fly from

Illinois

Fly to

Washington, D.C.

Route

Depart

Return

Price

ChicagoBaltimore

ORD - BWI

ORDBWI

Chicago O'Hare Intl

Fri 2/27

8:16 pm-9:06 am

1 stop11h 50m

Baltimore/Washington

Sun 3/1

9:59 pm-11:26 pm

Nonstop2h 27m

$116

ChicagoWashington, D.C.

MDW - IAD

MDWIAD

Chicago Midway

Thu 2/19

9:05 am-4:43 pm

1 stop6h 38m

Washington, D.C. Dulles Intl

Sat 2/28

10:29 am-9:39 pm

1 stop12h 10m

$138

ChicagoBaltimore

MDW - BWI

MDWBWI

Chicago Midway

Wed 2/11

6:15 am-5:47 pm

1 stop10h 32m

Baltimore/Washington

Thu 2/19

5:58 pm-10:37 pm

1 stop5h 39m

$142

ChicagoWashington, D.C.

MDW - IAD

MDWIAD

Chicago Midway

Thu 2/19

9:05 am-4:43 pm

1 stop6h 38m

Washington, D.C. Dulles Intl

Mon 2/23

11:41 am-7:47 pm

1 stop9h 06m

$148

ChicagoBaltimore

ORD - BWI

ORDBWI

Chicago O'Hare Intl

Wed 2/18

11:00 am-2:01 pm

Nonstop2h 01m

Baltimore/Washington

Sat 2/28

6:20 am-7:43 am

Nonstop2h 23m

$149

ChicagoBaltimore

ORD - BWI

ORDBWI

Chicago O'Hare Intl

Tue 2/24

11:00 am-2:01 pm

Nonstop2h 01m

Baltimore/Washington

Tue 3/3

10:30 am-11:53 am

Nonstop2h 23m

$149

ChicagoBaltimore

ORD - BWI

ORDBWI

Chicago O'Hare Intl

Wed 2/18

11:00 am-2:01 pm

Nonstop2h 01m

Baltimore/Washington

Thu 2/26

6:30 am-7:53 am

Nonstop2h 23m

$149

ChicagoBaltimore

MDW - BWI

MDWBWI

Chicago Midway

Mon 3/2

2:19 pm-12:31 am

1 stop9h 12m

Baltimore/Washington

Thu 3/5

5:53 pm-10:29 pm

1 stop5h 36m

$152

ChicagoWashington, D.C.

MDW - IAD

MDWIAD

Chicago Midway

Thu 2/26

6:25 am-4:43 pm

1 stop9h 18m

Washington, D.C. Dulles Intl

Thu 3/5

11:22 am-4:16 pm

1 stop5h 54m

$153

ChicagoBaltimore

MDW - BWI

MDWBWI

Chicago Midway

Mon 3/2

7:05 pm-9:55 pm

Nonstop1h 50m

Baltimore/Washington

Thu 3/5

6:40 am-7:50 am

Nonstop2h 10m

$158

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

Showing 1-10 of 60 results
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Best time to book a flight from Illinois to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Illinois with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Illinois to Washington, D.C.

What is the cheapest month to book a flight from Illinois to Washington, D.C.?

Currently, February is the cheapest month in which you can book a flight from Illinois to Washington, D.C. (average of $58). Flying from Illinois to Washington, D.C. in April is currently the most expensive (average of $169). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IL to WAS?

Find hourly flight availability from Illinois to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 29, 2026.

One of the essential ways to save on airfare from Illinois to Washington, D.C. is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the morning could potentially save you up to 23% on airfare.

What is the cheapest day to fly from Illinois to Washington, D.C.?

Use this chart to determine the cheapest time to fly round-trip from Illinois to Washington, D.C.. Price data was last updated on January 24, 2026.

Travelers seeking maximum savings on their Illinois to Washington, D.C. flight should consider departing on Monday at noon when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Illinois to Washington, D.C.

Explore weekly flight availability from Illinois to Washington, D.C.. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated January 29, 2026.

The most flights from USIL to WAS are scheduled on a Thursday (66 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (37 on average).

How much does it cost to fly round-trip from Illinois to Washington, D.C.?

Related info for your journey

Find useful and relevant information for your journey from Illinois to Washington, D.C.. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Illinois to Washington, D.C.?

    Airlines like Frontier, United Airlines, and Southwest fly from Illinois to Washington, D.C. in about 1h 50m. The time it takes to get you to your destination can typically vary by up to 4h 48m. The distance between Illinois and Washington, D.C. is about 609 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Illinois to Washington, D.C. one-way?

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $49. However, be on the lookout for offers from Southwest and American Airlines, as they are both options that can get you from Illinois to Washington, D.C. for a low price.

  • What are the most popular routes from Illinois to Washington, D.C.?

    Most travelers choose Chicago O'Hare Intl - Washington, D.C. Reagan-National, Chicago O'Hare Intl - Washington, D.C. Dulles Intl or Chicago O'Hare Intl - Baltimore/Washington when deciding on the best route from Illinois to Washington, D.C..

  • What are the most reliable airlines from Illinois to Washington, D.C.?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Illinois to Washington, D.C. on time: Egyptair (100%), Air China (94%), Avianca (84%).

  • What are the cheapest flights from Illinois to Washington, D.C.?

    On average you can expect to pay $1,230 for a flight from Illinois to Washington, D.C.. The cheapest flight overall is $115 while the most popular route, (Chicago O'Hare Intl - Washington, D.C. Reagan-National) is currently priced at $197.

  • Can I find deals for flights from Illinois to Washington, D.C. that include hotel bookings?

    Yes. In addition to deals on Illinois to Washington, D.C. flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Washington, D.C.?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Washington, D.C..

  • Can I find deals for business class flights from Illinois to Washington, D.C.?

    Yes. Cheapflights offers flight deals from Illinois to Washington, D.C. by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Illinois to Washington, D.C.?

    Currently, February is the cheapest month in which you can book a flight from Illinois to Washington, D.C. (average of $58). Flying from Illinois to Washington, D.C. in April is currently the most expensive (average of $169). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
Woodbridge
Tysons
Arlington
Owings Mills
Springfield
Silver Spring
Herndon
Fredericksburg
Hanover
Linthicum Heights
Rockville
Laurel
Towson
Manassas
Largo
Bowie
McLean
Clinton
Upper Marlboro

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Illinois to Washington, D.C.

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from Illinois to Washington, D.C.

Discover the top 7 airlines that operate flights from Illinois to Washington, D.C.. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$42Average$119FlexibilityNo cancel feeOn-time65%
FrontierCheapest$57Average$207FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$114Average$344FlexibilityNo cancel feeOn-time69%
DeltaCheapest$124Average$305FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$141Average$254FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$148Average$407FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$158Average$284FlexibilityNo cancel feeOn-time63%

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