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Washington, D.C.

$61+ 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 1/5. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — WAS
Jan 15 — Jan 221
Thu 1/15
Thu 1/22
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 December 16, 2025.

This United Airlines deal was found by Cheapflights users on 12/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:20 pmORD - BWI
Nonstop2h 06mUnited Airlines
Wed 12/316:15 amBWI - ORD
Nonstop2h 20mUnited Airlines
Deal found 12/16$139
This Travelocity deal was found by Cheapflights users on 12/14. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/243:51 pmORD - BWI
1 stop18h 53mFrontier
Mon 1/510:12 amBWI - ORD
Nonstop2h 18mFrontier
Deal found 12/14$157
This Kiwi.com deal was found by Cheapflights users on 12/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/235:35 amORD - BWI
Nonstop2h 07mFrontier
Thu 1/2912:05 pmBWI - ORD
Nonstop2h 27mFrontier
Deal found 12/16$167
This Delta deal was found by Cheapflights users on 12/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:08 pmMDW - BWI
1 stop4h 23mDelta
Thu 1/16:00 amBWI - MDW
1 stop3h 49mDelta
Deal found 12/14$177
This Delta deal was found by Cheapflights users on 12/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/255:30 amORD - BWI
1 stop6h 25mDelta
Thu 1/16:00 amBWI - ORD
1 stop4h 01mDelta
Deal found 12/15$177
This Frontier deal was found by Cheapflights users on 12/16. 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 12/256:12 amMDW - IAD
1 stop11h 04mFrontier
Wed 1/75:42 pmIAD - MDW
1 stop5h 35mFrontier
Deal found 12/16$188
This Kiwi.com deal was found by Cheapflights users on 12/15. 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.
Wed 12/317:30 amORD - BWI
1 stop11h 34mMultiple Airlines
Sun 1/43:36 pmBWI - ORD
Nonstop2h 18mMultiple Airlines
Deal found 12/15$193
This Southwest deal was found by Cheapflights users on 12/13. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2411:55 amORD - BWI
1 stop6h 50mSouthwest
Wed 12/313:55 pmBWI - ORD
1 stop6h 55mSouthwest
Deal found 12/13$194
This Southwest deal was found by Cheapflights users on 12/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:40 amMDW - BWI
Nonstop1h 50mSouthwest
Tue 1/65:50 pmBWI - MDW
Nonstop2h 10mSouthwest
Deal found 12/16$199
This United Airlines deal was found by Cheapflights users on 12/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:20 pmORD - BWI
Nonstop2h 06mUnited Airlines
Thu 1/16:15 amBWI - ORD
Nonstop2h 20mUnited Airlines
Deal found 12/15$209
This United Airlines deal was found by Cheapflights users on 12/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:51 amORD - BWI
Nonstop1h 57mUnited Airlines
Thu 1/16:15 amBWI - ORD
Nonstop2h 20mUnited Airlines
Deal found 12/16$210
This Kiwi.com deal was found by Cheapflights users on 12/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/235:35 amORD - BWI
Nonstop2h 07mFrontier
Mon 1/510:12 amBWI - ORD
Nonstop2h 18mFrontier
Deal found 12/14$213

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 December 16, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$83
(Frontier)

One-way from

$61
(Frontier)

Popular in

November

Cheapest in

August

Average price

$237

Good round-trip deal

$151 or less

Good one-way deal

$95 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. 10% potential increase in price ($28 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 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 December 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

ORD - BWI

ORDBWI

Chicago O'Hare Intl

Wed 1/14

11:05 am-2:11 pm

Nonstop2h 06m

Baltimore/Washington

Wed 1/14

5:18 pm-6:38 pm

Nonstop2h 20m

$134

ChicagoBaltimore

MDW - BWI

MDWBWI

Chicago Midway

Tue 1/20

9:50 am-12:40 pm

Nonstop1h 50m

Baltimore/Washington

Thu 1/22

1:45 pm-2:55 pm

Nonstop2h 10m

$139

ChicagoBaltimore

MDW - BWI

MDWBWI

Chicago Midway

Thu 1/15

7:10 pm-10:00 pm

Nonstop1h 50m

Baltimore/Washington

Sat 1/17

5:50 pm-7:00 pm

Nonstop2h 10m

$139

ChicagoBaltimore

ORD - BWI

ORDBWI

Chicago O'Hare Intl

Sat 1/24

6:15 pm-9:21 pm

Nonstop2h 06m

Baltimore/Washington

Mon 1/26

10:05 am-11:25 am

Nonstop2h 20m

$139

ChicagoBaltimore

MDW - BWI

MDWBWI

Chicago Midway

Thu 1/15

1:25 pm-4:10 pm

Nonstop1h 45m

Baltimore/Washington

Sun 1/18

1:45 pm-2:55 pm

Nonstop2h 10m

$139

ChicagoBaltimore

MDW - BWI

MDWBWI

Chicago Midway

Thu 1/22

1:15 pm-4:00 pm

Nonstop1h 45m

Baltimore/Washington

Mon 1/26

1:45 pm-2:55 pm

Nonstop2h 10m

$139

ChicagoBaltimore

ORD - BWI

ORDBWI

Chicago O'Hare Intl

Tue 1/20

11:05 am-2:11 pm

Nonstop2h 06m

Baltimore/Washington

Sun 1/25

5:18 pm-6:38 pm

Nonstop2h 20m

$158

ChicagoBaltimore

ORD - BWI

ORDBWI

Chicago O'Hare Intl

Fri 2/27

6:15 pm-9:17 pm

Nonstop2h 02m

Baltimore/Washington

Mon 3/2

6:30 am-7:53 am

Nonstop2h 23m

$158

ChicagoBaltimore

MDW - BWI

MDWBWI

Chicago Midway

Fri 1/16

1:25 pm-4:10 pm

Nonstop1h 45m

Baltimore/Washington

Mon 1/19

7:40 am-9:00 am

Nonstop2h 20m

$158

ChicagoBaltimore

ORD - BWI

ORDBWI

Chicago O'Hare Intl

Tue 1/20

11:05 am-2:11 pm

Nonstop2h 06m

Baltimore/Washington

Fri 1/23

10:05 am-11:25 am

Nonstop2h 20m

$158

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

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 December 16, 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 24% 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 United Airlines, Southwest, and Frontier 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 7h 18m. 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 - Baltimore/Washington or Chicago O'Hare Intl - Washington, D.C. Dulles Intl 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: Air China (82%), Avianca (82%), ANA (70%).

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

    On average you can expect to pay $1,068 for a flight from Illinois to Washington, D.C.. The cheapest flight overall is $134 while the most popular route, (Chicago O'Hare Intl - Washington, D.C. Reagan-National) is currently priced at $185.

  • 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
Hanover
Silver Spring
Fredericksburg
Linthicum Heights
Rockville
Laurel
Towson
Manassas
National Harbor
Bowie
Largo
McLean
Clinton
Cordova

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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Los Angeles to Dulles Intl flights
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Newark to Reagan-National flights

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 December 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$45Average$147FlexibilityNo cancel feeOn-time65%
FrontierCheapest$58Average$190FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$142Average$341FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$149Average$384FlexibilityNo cancel feeOn-time71%
JetBlueCheapest$152Average$268FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$157Average$284FlexibilityNo cancel feeOn-time63%
DeltaCheapest$166Average$295FlexibilityNo cancel feeOn-timeN/A

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