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Washington, D.C.

$47+ 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 12/23. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — WAS
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Find 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 October 30, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/29. 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 11/258:35 amORD - BWI
Nonstop1h 59mFrontier
Sun 2/228:58 amBWI - ORD
Nonstop2h 24mFrontier
Deal found 10/29$95
This Kiwi.com deal was found by Cheapflights users on 10/30. 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.
Sat 11/2212:25 pmMDW - BWI
Nonstop1h 56mFrontier
Mon 11/244:06 pmBWI - MDW
Nonstop2h 09mFrontier
Deal found 10/30$96
This CheapOair deal was found by Cheapflights users on 10/28. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/151:37 pmMDW - BWI
1 stop9h 25mFrontier
Mon 11/177:25 pmBWI - MDW
Nonstop2h 06mFrontier
Deal found 10/28$97
This CheapOair deal was found by Cheapflights users on 10/28. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/155:45 pmORD - BWI
1 stop5h 17mFrontier
Mon 11/174:02 pmBWI - ORD
Nonstop2h 16mFrontier
Deal found 10/28$97
This CheapOair deal was found by Cheapflights users on 10/28. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/174:01 pmORD - BWI
1 stop7h 23mFrontier
Mon 1/128:58 amBWI - ORD
Nonstop2h 24mFrontier
Deal found 10/28$98
This CheapOair deal was found by Cheapflights users on 10/30. 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.
Fri 12/124:20 pmORD - BWI
1 stop7h 12mFrontier
Mon 12/153:36 pmBWI - ORD
Nonstop2h 18mFrontier
Deal found 10/30$100
This Frontier deal was found by Cheapflights users on 10/30. 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.
Fri 12/54:20 pmORD - BWI
1 stop7h 12mFrontier
Sun 12/79:13 amBWI - ORD
Nonstop2h 18mFrontier
Deal found 10/30$101
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1412:04 pmORD - BWI
Nonstop2h 03mFrontier
Mon 11/174:02 pmBWI - ORD
Nonstop2h 16mFrontier
Deal found 10/28$102
This Frontier deal was found by Cheapflights users on 10/29. 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 11/156:15 amMDW - BWI
1 stop8h 20mFrontier
Sun 11/169:21 amBWI - MDW
Nonstop2h 05mFrontier
Deal found 10/29$103
This Mytrip deal was found by Cheapflights users on 10/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/512:09 pmORD - BWI
1 stop11h 14mMultiple Airlines
Sun 12/79:13 amBWI - ORD
Nonstop2h 18mMultiple Airlines
Deal found 10/28$104
This Orbitz deal was found by Cheapflights users on 10/28. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1212:09 pmORD - BWI
1 stop11h 14mMultiple Airlines
Mon 12/153:36 pmBWI - ORD
Nonstop2h 18mMultiple Airlines
Deal found 10/28$105
This Frontier deal was found by Cheapflights users on 10/28. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/131:24 pmORD - BWI
1 stop10h 00mFrontier
Mon 12/153:36 pmBWI - ORD
Nonstop2h 18mFrontier
Deal found 10/28$106

Cheap 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 October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$95
(Kiwi.com)

One-way from

$47
(Kiwi.com)

Popular in

January

Cheapest in

August

Average price

$257

Good round-trip deal

$140 or less

Good one-way deal

$87 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. 5% potential increase in price ($11 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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 October 30, 2025.
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

Wed 11/12

12:37 pm-6:29 pm

1 stop4h 52m

Baltimore/Washington

Sat 11/15

4:30 pm-11:29 pm

1 stop7h 59m

$109

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Thu 11/13

2:12 pm-8:34 am

1 stop17h 22m

Baltimore/Washington

Sun 11/16

10:21 am-9:40 am

1 stop24h 19m

$128

ChicagoBaltimore

MDW - BWI

MDWBWI

Chicago Midway

Mon 1/26

9:50 am-12:40 pm

Nonstop1h 50m

Baltimore/Washington

Tue 1/27

5:50 pm-7:00 pm

Nonstop2h 10m

$139

ChicagoBaltimore

ORD - BWI

ORDBWI

Chicago O'Hare Intl

Mon 1/12

11:05 am-2:11 pm

Nonstop2h 06m

Baltimore/Washington

Wed 1/14

10:05 am-11:25 am

Nonstop2h 20m

$139

ChicagoBaltimore

MDW - BWI

MDWBWI

Chicago Midway

Mon 1/12

5:15 pm-8:10 pm

Nonstop1h 55m

Baltimore/Washington

Wed 1/14

10:25 am-11:35 am

Nonstop2h 10m

$139

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Sat 1/24

5:11 pm-7:47 am

1 stop13h 36m

Baltimore/Washington

Tue 1/27

6:45 am-10:33 pm

2 stops16h 48m

$148

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Sun 1/25

5:11 pm-7:47 am

1 stop13h 36m

Baltimore/Washington

Tue 1/27

3:31 pm-10:33 pm

1 stop8h 02m

$150

ChicagoWashington, D.C.

ORD - DCA

ORDDCA

Chicago O'Hare Intl

Sat 11/15

6:45 am-2:35 pm

1 stop6h 50m

Washington, D.C. Reagan-National

Tue 11/18

4:55 pm-8:52 pm

1 stop4h 57m

$153

ChicagoBaltimore

MDW - BWI

MDWBWI

Chicago Midway

Wed 11/19

6:40 am-9:30 am

Nonstop1h 50m

Baltimore/Washington

Wed 12/3

8:00 pm-9:05 pm

Nonstop2h 05m

$168

ChicagoBaltimore

MDW - BWI

MDWBWI

Chicago Midway

Thu 11/27

11:50 am-2:35 pm

Nonstop1h 45m

Baltimore/Washington

Thu 12/4

8:55 am-10:10 am

Nonstop2h 15m

$173

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

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 $57). 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 October 30, 2025.

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 in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 25% 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 December 16, 2024.

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

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, Southwest, and United Airlines 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 3h 02m. 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 $69. However, be on the lookout for offers from Southwest and United 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. Dulles Intl, Chicago O'Hare Intl - Baltimore/Washington or Chicago O'Hare Intl - Washington, D.C. Reagan-National 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 (100%), ITA Airways (97%).

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

    On average you can expect to pay $872 for a flight from Illinois to Washington, D.C.. The cheapest flight overall is $118 while the most popular route, (Chicago O'Hare Intl - Washington, D.C. Dulles Intl) is currently priced at $130.

  • 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 $57). 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
Springfield
Hanover
Silver Spring
Fairfax
Fredericksburg
Falls Church
Owings Mills
Linthicum Heights
Manassas
Largo
Oxon Hill
Laurel
Towson
National Harbor
Waldorf
Bowie

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 6 airlines flying from Illinois to Washington, D.C.

Discover the top 6 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$45Average$147FlexibilityNo cancel feeOn-time65%
FrontierCheapest$63Average$192FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$143Average$285FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$143Average$340FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$147Average$402FlexibilityNo cancel feeOn-time71%
DeltaCheapest$166Average$317FlexibilityNo cancel feeOn-timeN/A

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