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Washington, D.C.

$67+ 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 9/11. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — WAS
Sep 5 — Sep 121
Sat 9/5
Sat 9/12
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 August 6, 2026.

This Kiwi.com deal was found by Cheapflights users on 8/1. 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.
Mon 9/142:29 pm -
1 stop7h 35m
Mon 9/216:00 am -
1 stop8h 10m
Deal found 8/1$139
This Kiwi.com deal was found by Cheapflights users on 8/4. 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 9/46:17 pm -
1 stop12h 09m
Fri 9/116:00 am -
1 stop8h 10m
Deal found 8/4$142
This Kiwi.com deal was found by Cheapflights users on 8/4. 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 9/46:17 pm -
1 stop12h 09m
Sun 9/66:45 am -
1 stop11h 37m
Deal found 8/4$143
This Super.com deal was found by Cheapflights users on 8/5. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/106:20 am -
Nonstop2h 05m
Thu 9/1710:20 am -
Nonstop2h 20m
Deal found 8/5$144
This Kiwi.com deal was found by Cheapflights users on 8/4. 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 9/36:17 pm -
1 stop12h 09m
Thu 9/109:25 pm -
1 stop16h 45m
Deal found 8/4$145
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 10/1610:35 am -
1 stop6h 59m
Sun 10/189:29 pm -
1 stop13h 11m
Deal found 8/2$146
This Frontier deal was found by Cheapflights users on 8/5. 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 9/176:20 am -
Nonstop2h 05m
Mon 9/2110:20 am -
Nonstop2h 20m
Deal found 8/5$146
This Kiwi.com deal was found by Cheapflights users on 8/1. 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 9/252:29 pm -
1 stop7h 35m
Sun 9/279:25 pm -
1 stop16h 45m
Deal found 8/1$147
This Frontier deal was found by Cheapflights users on 8/5. 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 9/116:20 am -
Nonstop2h 05m
Sat 9/1210:22 am -
1 stop9h 01m
Deal found 8/5$147
This Kiwi.com deal was found by Cheapflights users on 8/5. 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 10/1510:35 am -
1 stop6h 59m
Thu 10/229:29 pm -
1 stop13h 11m
Deal found 8/5$148
This Kiwi.com deal was found by Cheapflights users on 8/5. 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.
Sun 9/61:03 pm -
Nonstop2h 10m
Fri 9/1110:20 am -
Nonstop2h 20m
Deal found 8/5$150
This Kiwi.com deal was found by Cheapflights users on 8/1. 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.
Mon 8/316:17 pm -
1 stop26h 42m
Mon 9/76:45 am -
1 stop11h 37m
Deal found 8/1$151

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 August 6, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$139
(Kiwi.com)

One-way from

$67
(Trip.com)

Popular in

June

Cheapest in

September

Average price

$239

Good round-trip deal

$177 or less

Good one-way deal

$128 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.
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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. 19% potential increase in price ($67 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 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 August 6, 2026.
Use the filters below to find and compare flights from Illinois to Washington, D.C. that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoWashington, D.C.

ORD Chicago O'Hare Intl - DCA Washington, D.C. Reagan-National

ORDDCA

Chicago O'Hare Intl

Sat 9/5

10:50 am-7:34 pm

1 stop7h 44m

Washington, D.C. Reagan-National

Sun 9/6

1:45 pm-6:59 pm

1 stop6h 14m

$197

ChicagoWashington, D.C.

ORD Chicago O'Hare Intl - IAD Washington, D.C. Dulles Intl

ORDIAD

Chicago O'Hare Intl

Sat 9/5

1:50 pm-8:05 pm

1 stop5h 15m

Washington, D.C. Dulles Intl

Sun 9/6

6:10 am-10:42 am

1 stop5h 32m

$199

ChicagoWashington, D.C.

MDW Chicago Midway - DCA Washington, D.C. Reagan-National

MDWDCA

Chicago Midway

Thu 9/3

2:05 pm-4:55 pm

Nonstop1h 50m

Washington, D.C. Reagan-National

Sun 9/6

2:55 pm-3:55 pm

Nonstop2h 00m

$216

ChicagoWashington, D.C.

ORD Chicago O'Hare Intl - IAD Washington, D.C. Dulles Intl

ORDIAD

Chicago O'Hare Intl

Tue 9/1

6:15 pm-9:20 pm

Nonstop2h 05m

Washington, D.C. Dulles Intl

Sat 9/5

5:15 pm-6:37 pm

Nonstop2h 22m

$216

ChicagoBaltimore

MDW Chicago Midway - BWI Baltimore/Washington

MDWBWI

Chicago Midway

Thu 9/3

8:05 am-12:20 pm

1 stop3h 15m

Baltimore/Washington

Sun 9/6

9:35 pm-10:35 pm

Nonstop2h 00m

$225

ChicagoWashington, D.C.

ORD Chicago O'Hare Intl - DCA Washington, D.C. Reagan-National

ORDDCA

Chicago O'Hare Intl

Sat 9/5

3:25 pm-11:48 pm

1 stop7h 23m

Washington, D.C. Reagan-National

Tue 9/8

1:15 pm-7:15 pm

1 stop7h 00m

$236

ChicagoWashington, D.C.

ORD Chicago O'Hare Intl - DCA Washington, D.C. Reagan-National

ORDDCA

Chicago O'Hare Intl

Thu 9/3

5:20 pm-10:59 pm

1 stop4h 39m

Washington, D.C. Reagan-National

Sun 9/6

9:39 am-1:36 pm

1 stop4h 57m

$236

ChicagoWashington, D.C.

MDW Chicago Midway - IAD Washington, D.C. Dulles Intl

MDWIAD

Chicago Midway

Thu 9/3

6:42 pm-11:26 pm

1 stop3h 44m

Washington, D.C. Dulles Intl

Sun 9/6

6:10 am-9:17 am

1 stop4h 07m

$236

ChicagoBaltimore

ORD Chicago O'Hare Intl - BWI Baltimore/Washington

ORDBWI

Chicago O'Hare Intl

Thu 9/3

6:59 am-11:42 am

1 stop3h 43m

Baltimore/Washington

Sun 9/6

7:00 am-12:40 pm

1 stop6h 40m

$239

ChicagoBaltimore

MDW Chicago Midway - BWI Baltimore/Washington

MDWBWI

Chicago Midway

Fri 9/4

5:25 pm-8:15 pm

Nonstop1h 50m

Baltimore/Washington

Sun 9/6

9:35 pm-10:35 pm

Nonstop2h 00m

$248

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/6

Showing 1-10 of 60 resultsSorted by cheapest first
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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, September is the cheapest month in which you can book a flight from Illinois to Washington, D.C. (average of $275). Flying from Illinois to Washington, D.C. in June is currently the most expensive (average of $403). 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 August 6, 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 in the afternoon tend to be the most expensive. A flight in the morning could potentially save you up to 15% on airfare.

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 August 6, 2026.

The most flights from USIL to WAS are scheduled on a Wednesday (88 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (16 on average).

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

Airfare is below average for this route at the moment.
Illinois to Washington, D.C. flights typically cost between $162 and $322 in September.
The cheapest round-trip price found within the last 5 days was $144 on Frontier (Sep 10-Sep 17).

How far ahead should I book a flight from Illinois to Washington, D.C.?

The price you pay for your flight from Illinois to Washington, D.C. may vary depending on when you book. For the best chance of a lower fare, look to book 82 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 August 1, 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. Tuesday 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 Delta, 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 5h 54m. The distance between Illinois and Washington, D.C. is about 599 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 American Airlines and Southwest, 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 (96%), ITA Airways (94%), Air China (94%).

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

    On average you can expect to pay $1,906 for a flight from Illinois to Washington, D.C.. The cheapest flight overall is $128 while the most popular route, (Chicago O'Hare Intl - Washington, D.C. Reagan-National) is currently priced at $179.

  • 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, September is the cheapest month in which you can book a flight from Illinois to Washington, D.C. (average of $275). Flying from Illinois to Washington, D.C. in June is currently the most expensive (average of $403). 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
Owings Mills
Arlington
Tysons
Springfield
Lanham
Reston
Herndon
Rockville
Hyattsville
Fredericksburg
Falls Church
Hanover
Laurel
Clinton
Oxon Hill
Hunt Valley
Woodbridge
Silver Spring
Largo

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.
Dallas/Fort Worth to Dulles Intl flights
Dallas/Fort Worth to Reagan-National flights
Atlanta to Dulles Intl flights
Los Angeles to Reagan-National flights
Atlanta to Reagan-National flights
Seattle to Reagan-National flights
O'Hare Intl to Reagan-National flights
San Francisco to Dulles Intl flights
O'Hare Intl to Dulles Intl flights
Seattle to Dulles Intl flights
San Francisco to Reagan-National flights
Tampa to Dulles Intl flights
Boston to Reagan-National flights
Hobby to Reagan-National flights
Hobby to Dulles Intl flights
Minneapolis to Dulles Intl flights
Los Angeles to Dulles Intl flights
Orlando to Dulles Intl flights
Tampa to Reagan-National flights
Orlando to Reagan-National flights
John F Kennedy Intl to Dulles Intl flights
Denver to Dulles Intl flights
Miami to Reagan-National flights
Minneapolis to Reagan-National flights
Boston to Dulles Intl flights
George Bush Intcntl to Dulles Intl flights
George Bush Intcntl to Reagan-National flights
Austin to Dulles Intl flights
Fort Lauderdale to Dulles Intl flights
Miami to Dulles Intl flights
Charlotte to Dulles Intl flights
Ontario to Dulles Intl flights
Midway to Dulles Intl flights
Sky Harbor Intl to Dulles Intl flights
Detroit to Reagan-National flights
Indianapolis to Dulles Intl flights
San Diego to Dulles Intl flights
Denver to Reagan-National flights
Newark to Dulles Intl flights
Detroit to Dulles Intl flights
Austin to Reagan-National flights
LaGuardia to Reagan-National flights
Indianapolis to Reagan-National flights
Providence to Dulles Intl flights
Ontario to Reagan-National flights
San Diego to Reagan-National flights
John F Kennedy Intl to Reagan-National flights
Fort Lauderdale to Reagan-National flights
Portland to Dulles Intl flights
Jacksonville to Dulles Intl flights

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 August 6, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$57Average$198FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$141Average$264FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$149Average$365FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$158Average$314FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$177Average$398FlexibilityNo cancel feeOn-time71%
DeltaCheapest$293Average$417FlexibilityNo cancel feeOn-timeN/A

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