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Washington, D.C.

$59+ 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 10/9. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — WAS
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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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 September 16, 2025.

Round-trip from

$88
(Cheapflightsfares)

One-way from

$59
(Frontier)

Popular in

January

Cheapest in

August

Average price

$212

Good round-trip deal

$111 or less

Good one-way deal

$89 or less
From Illinois to Washington, D.C. (WAS)
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One-way flight from Illinois to Washington, D.C. (WAS)
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Highest demand for flights based on searches. 5% potential increase in price ($13 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($3 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Illinois to Washington, D.C. (WAS).
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Price to beat on a one-way flight from Illinois to Washington, D.C. (WAS).
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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 September 16, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1712:48 pmORD - BWI
Nonstop2h 03mFrontier
Mon 10/205:04 pmBWI - ORD
Nonstop2h 16mFrontier
Deal found 9/15$88
This Frontier deal was found by Cheapflights users on 9/15. 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 10/1712:48 pmORD - BWI
Nonstop2h 03mFrontier
Sun 10/198:48 pmBWI - ORD
Nonstop2h 29mFrontier
Deal found 9/15$89
This Frontier deal was found by Cheapflights users on 9/16. 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 11/612:00 pmORD - BWI
Nonstop2h 03mFrontier
Sun 11/94:09 pmBWI - ORD
Nonstop2h 16mFrontier
Deal found 9/16$91
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 10/2312:30 pmMDW - BWI
Nonstop1h 57mFrontier
Sat 10/254:12 pmBWI - MDW
Nonstop2h 01mFrontier
Deal found 9/15$92
This Gotogate deal was found by Cheapflights users on 9/15. 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.
Sat 10/1812:30 pmMDW - BWI
Nonstop1h 57mFrontier
Mon 10/207:54 pmBWI - MDW
Nonstop2h 06mFrontier
Deal found 9/15$94
This Booking.com deal was found by Cheapflights users on 9/13. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/73:47 pmMDW - BWI
Nonstop1h 55mFrontier
Sun 11/99:21 amBWI - MDW
Nonstop2h 05mFrontier
Deal found 9/13$96
This Cheapflightsfares deal was found by Cheapflights users on 9/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/143:11 pmORD - BWI
Nonstop1h 54mSpirit Airlines
Sun 11/165:44 pmBWI - ORD
Nonstop2h 17mSpirit Airlines
Deal found 9/14$99
This Spirit deal was found by Cheapflights users on 9/16. 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 Spirit is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/73:11 pmORD - BWI
Nonstop1h 54mSpirit Airlines
Sun 11/95:44 pmBWI - ORD
Nonstop2h 17mSpirit Airlines
Deal found 9/16$100
This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1612:30 pmMDW - BWI
Nonstop1h 57mFrontier
Mon 10/207:54 pmBWI - MDW
Nonstop2h 06mFrontier
Deal found 9/15$101
This CheapOair deal was found by Cheapflights users on 9/14. 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 11/73:47 pmMDW - BWI
Nonstop1h 55mFrontier
Mon 11/107:25 pmBWI - MDW
Nonstop2h 06mFrontier
Deal found 9/14$102
This Gotogate deal was found by Cheapflights users on 9/16. 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 11/63:40 pmMDW - BWI
Nonstop1h 55mFrontier
Sun 11/99:21 amBWI - MDW
Nonstop2h 05mFrontier
Deal found 9/16$103
This Frontier deal was found by Cheapflights users on 9/15. 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 10/26:11 pmORD - BWI
Nonstop2h 03mFrontier
Sun 10/59:59 pmBWI - ORD
Nonstop2h 21mFrontier
Deal found 9/15$103

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 September 16, 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

MDW - BWI

MDWBWI

Chicago Midway

Thu 10/30

3:40 pm-6:35 pm

Nonstop1h 55m

Baltimore/Washington

Mon 11/3

7:25 pm-8:31 pm

Nonstop2h 06m

$117

ChicagoBaltimore

MDW - BWI

MDWBWI

Chicago Midway

Fri 10/31

3:40 pm-6:35 pm

Nonstop1h 55m

Baltimore/Washington

Sun 11/2

8:21 pm-8:32 am

1 stop13h 11m

$123

ChicagoBaltimore

MDW - BWI

MDWBWI

Chicago Midway

Wed 12/10

6:55 pm-9:45 pm

Nonstop1h 50m

Baltimore/Washington

Sat 12/13

3:15 pm-4:20 pm

Nonstop2h 05m

$139

ChicagoBaltimore

ORD - BWI

ORDBWI

Chicago O'Hare Intl

Wed 10/22

2:22 pm-5:26 pm

Nonstop2h 04m

Baltimore/Washington

Wed 10/29

6:15 am-7:31 am

Nonstop2h 16m

$139

ChicagoBaltimore

MDW - BWI

MDWBWI

Chicago Midway

Tue 10/14

5:35 am-8:20 am

Nonstop1h 45m

Baltimore/Washington

Tue 10/21

10:55 am-12:00 pm

Nonstop2h 05m

$139

ChicagoBaltimore

ORD - BWI

ORDBWI

Chicago O'Hare Intl

Wed 12/10

6:20 pm-9:19 pm

Nonstop1h 59m

Baltimore/Washington

Sat 12/13

10:20 am-11:28 am

Nonstop2h 08m

$139

ChicagoBaltimore

MDW - BWI

MDWBWI

Chicago Midway

Wed 10/15

7:40 pm-10:30 pm

Nonstop1h 50m

Baltimore/Washington

Wed 10/22

1:25 pm-2:25 pm

Nonstop2h 00m

$139

ChicagoBaltimore

MDW - BWI

MDWBWI

Chicago Midway

Fri 10/10

4:12 pm-7:08 pm

Nonstop1h 56m

Baltimore/Washington

Mon 10/13

12:30 pm-11:46 pm

1 stop12h 16m

$142

ChicagoWashington, D.C.

MDW - IAD

MDWIAD

Chicago Midway

Fri 10/3

5:15 pm-11:39 pm

1 stop5h 24m

Washington, D.C. Dulles Intl

Wed 10/8

9:00 am-1:38 pm

1 stop5h 38m

$143

ChicagoWashington, D.C.

MDW - IAD

MDWIAD

Chicago Midway

Sat 10/4

11:21 am-6:29 pm

1 stop6h 08m

Washington, D.C. Dulles Intl

Mon 10/6

1:55 pm-11:41 pm

1 stop10h 46m

$143

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

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, August is the cheapest month in which you can book a flight from Illinois to Washington, D.C. (average of $292). Flying from Illinois to Washington, D.C. in April is currently the most expensive (average of $337). 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 September 16, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Washington, D.C. as you normally would.

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 September 16, 2025.

The most flights from USIL to WAS are scheduled on a Monday (84 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (47 on average).

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 is usually consistent. The distance between Illinois and Washington, D.C. is about 609 mi. All flights are typically nonstop.

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

    The cheapest airline one-way is Southwest, with whom users have recently found tickets for as low as $70. However, be on the lookout for offers from United Airlines and Frontier, 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 (82%), Avianca (80%).

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

    On average you can expect to pay $1,832 for a flight from Illinois to Washington, D.C.. The cheapest flight overall is $142 while the most popular route, (Chicago O'Hare Intl - Washington, D.C. Reagan-National) is currently priced at $133.

  • 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, August is the cheapest month in which you can book a flight from Illinois to Washington, D.C. (average of $292). Flying from Illinois to Washington, D.C. in April is currently the most expensive (average of $337). 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
Woodbridge
Arlington
Alexandria
Tysons
Silver Spring
Springfield
Gaithersburg
Fredericksburg
Linthicum Heights
Fairfax
Falls Church
Owings Mills
Manassas
Rockville
Hanover
Oxon Hill
Laurel
Towson
National Harbor
Dundalk

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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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$45Average$142FlexibilityNo cancel feeOn-time65%
FrontierCheapest$75Average$186FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$124Average$390FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$153Average$285FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$154Average$343FlexibilityNo cancel feeOn-time69%
DeltaCheapest$166Average$375FlexibilityNo cancel feeOn-timeN/A

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