HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Illinois

$53+ Cheap flights from Washington, D.C. (WAS) to Illinois

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 2/22. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — ORD
Dec 25 — Jan 11
Wed 12/25
Wed 1/1
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Washington, D.C. to Illinois with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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

Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) to Illinois (USIL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 20, 2024.

Round-trip from

$111
(Mytrip)

One-way from

$54
(Mytrip)
From Washington, D.C. (WAS) to Illinois
Search Deals
One-way flight from Washington, D.C. (WAS) to Illinois
Search Deals

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

Cheapest flights from Washington, D.C. to Illinois
Explore the most affordable flight options available from Washington, D.C. to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 20, 2024.

This Cheapflightsfares deal was found by Cheapflights users on 12/18. 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.
Wed 12/2510:07 amBWI - MDW
Nonstop2h 04mFrontier
Wed 1/16:25 amMDW - BWI
Nonstop1h 52mFrontier
Deal found 12/18$118
This Frontier deal was found by Cheapflights users on 12/19. 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.
Tue 12/3111:34 amIAD - MDW
1 stop11h 59mFrontier
Fri 1/38:25 amMDW - IAD
1 stop11h 40mFrontier
Deal found 12/19$208
This Delta deal was found by Cheapflights users on 12/18. 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 12/2511:48 amBWI - STL
1 stop5h 24mDelta
Fri 1/105:00 pmSTL - BWI
1 stop6h 37mDelta
Deal found 12/18$238
This American Airlines deal was found by Cheapflights users on 12/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/317:30 amBWI - ORD
Nonstop2h 23mAmerican Airlines
Tue 1/76:00 pmORD - BWI
Nonstop2h 03mAmerican Airlines
Deal found 12/19$244
This Frontier deal was found by Cheapflights users on 12/19. 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.
Tue 12/319:07 amBWI - ORD
1 stop8h 21mFrontier
Sat 1/47:25 amORD - BWI
1 stop8h 28mFrontier
Deal found 12/19$258
This Delta deal was found by Cheapflights users on 12/19. 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.
Tue 12/316:05 amBWI - ORD
1 stop4h 16mDelta
Tue 1/74:15 pmORD - BWI
1 stop6h 42mDelta
Deal found 12/19$263
This Kiwi.com deal was found by Cheapflights users on 12/19. 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 12/301:59 pmBWI - ORD
1 stop21h 29mMultiple Airlines
Tue 1/78:14 pmORD - BWI
1 stop10h 25mMultiple Airlines
Deal found 12/19$276
This American Airlines deal was found by Cheapflights users on 12/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/258:22 amDCA - ORD
1 stop4h 03mAmerican Airlines
Tue 12/313:47 pmORD - DCA
1 stop3h 54mAmerican Airlines
Deal found 12/19$278
This Delta deal was found by Cheapflights users on 12/19. 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 12/256:00 amIAD - MDW
1 stop3h 50mDelta
Tue 12/315:51 pmMDW - IAD
1 stop4h 11mDelta
Deal found 12/19$278
This Mytrip deal was found by Cheapflights users on 12/19. 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.
Tue 12/317:18 pmBWI - ORD
2 stops14h 19mSpirit Airlines
Tue 1/71:24 pmORD - BWI
2 stops17h 19mSpirit Airlines
Deal found 12/19$280
This Southwest deal was found by Cheapflights users on 12/19. 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.
Tue 12/316:40 amBWI - ORD
1 stop9h 20mSouthwest
Tue 1/77:30 amORD - BWI
2 stops8h 35mSouthwest
Deal found 12/19$298
This Southwest deal was found by Cheapflights users on 12/18. 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.
Tue 12/316:35 pmDCA - MDW
Nonstop2h 05mSouthwest
Sun 1/56:40 amMDW - DCA
Nonstop1h 50mSouthwest
Deal found 12/18$315

Find flights from Washington, D.C. to Illinois within your budget

Customize your flight search to find flights from Washington, D.C. to Illinois 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 20, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

Sat 1/18

6:35 pm-11:29 pm

1 stop5h 54m

Chicago Midway

Mon 1/20

4:08 pm-7:03 pm

Nonstop1h 55m

$111

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

Wed 2/19

6:00 am-4:31 pm

1 stop11h 31m

Chicago O'Hare Intl

Mon 2/24

7:08 pm-7:21 am

1 stop11h 13m

$112

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Tue 1/7

10:10 am-11:27 pm

1 stop14h 17m

Lambert-St Louis

Sat 1/18

5:05 pm-7:51 am

1 stop13h 46m

$116

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

Wed 2/19

6:30 am-7:52 am

Nonstop2h 22m

Chicago O'Hare Intl

Sat 2/22

6:15 pm-9:12 pm

Nonstop1h 57m

$138

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

Sat 1/18

11:25 am-12:45 pm

Nonstop2h 20m

Chicago O'Hare Intl

Tue 1/21

7:00 am-9:55 am

Nonstop1h 55m

$140

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

Sat 1/18

11:51 am-1:12 pm

Nonstop2h 21m

Chicago O'Hare Intl

Wed 1/22

8:20 am-11:17 am

Nonstop1h 57m

$149

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

Sat 1/18

8:31 pm-9:52 am

1 stop14h 21m

Chicago O'Hare Intl

Wed 1/22

5:11 am-2:35 pm

1 stop8h 24m

$157

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

Wed 1/15

5:25 pm-6:35 pm

Nonstop2h 10m

Chicago Midway

Sat 1/18

6:25 pm-9:15 pm

Nonstop1h 50m

$160

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Thu 2/20

10:25 pm-12:10 pm

1 stop14h 45m

Chicago O'Hare Intl

Sun 2/23

5:05 am-9:25 pm

1 stop15h 20m

$164

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Sun 1/19

6:00 pm-12:32 am

1 stop7h 32m

Chicago O'Hare Intl

Sun 1/26

7:25 am-9:59 pm

1 stop13h 34m

$168

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/20

Showing 1-10 of 60 results
1
2
3
...
6

Best time to book a flight from Washington, D.C. to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Washington, D.C. 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.

Travel insights for flights from Washington, D.C. to Illinois

Get recent, data-driven insights about flights from Washington, D.C. to Illinois including ideal travel times, pricing trends, and more.

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

Currently, August is the cheapest month in which you can book a flight from Washington, D.C. to Illinois (average of $245). Flying from Washington, D.C. to Illinois in March is currently the most expensive (average of $317). 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 WAS to IL?

Find hourly flight availability from Washington, D.C. to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 20, 2024.

When flying from Washington, D.C. to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

Explore weekly flight availability from Washington, D.C. to Illinois. 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 December 20, 2024.

The most flights from WAS to USIL are scheduled on a Friday (63 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (25 on average).

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated December 20, 2024.
Peruse reviews from past customers who have flown with United Airlines, Southwest and Spirit Airlines from Washington, D.C. to Illinois to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,821 reviews

Food

7.2

Overall

8.1

Entertainment

7.7

Boarding

8.2

Comfort

8.1

Crew

8.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,821 reviews
Southwest
8.1
Very good
4,821 reviews

Food

7.2

Overall

8.1

Entertainment

7.7

Boarding

8.2

Comfort

8.1

Crew

8.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Alaska Airlines
8.0
Very good
9,545 reviews
Southwest
8.1
Very good
4,821 reviews

Food

7.2

Overall

8.1

Entertainment

7.7

Boarding

8.2

Comfort

8.1

Crew

8.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,601 reviews
Southwest
8.1
Very good
4,821 reviews

Food

7.2

Overall

8.1

Entertainment

7.7

Boarding

8.2

Comfort

8.1

Crew

8.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Avelo Airlines
7.5
Good
74 reviews
Southwest
8.1
Very good
4,821 reviews

Food

7.2

Overall

8.1

Entertainment

7.7

Boarding

8.2

Comfort

8.1

Crew

8.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

JetBlue
7.4
Good
3,267 reviews
Southwest
8.1
Very good
4,821 reviews

Food

7.2

Overall

8.1

Entertainment

7.7

Boarding

8.2

Comfort

8.1

Crew

8.7

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Related info for your journey

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

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

    $54 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on American Airlines and Spirit Airlines, with prices starting from $80 and $82, respectively.

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

    While some choose either Baltimore/Washington - Chicago O'Hare Intl or Washington, D.C. Reagan-National - Chicago O'Hare Intl, Washington, D.C. Dulles Intl - Chicago O'Hare Intl is the most popular route from Washington, D.C. to Illinois.

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

    The top 3 most reliable airlines when flying from Washington, D.C. to Illinois are ANA (89%), Ethiopian Air (89%) and Copa Airlines (87%).

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

    On average you can expect to pay $1,058 for a flight from Washington, D.C. to Illinois. The cheapest flight overall is $114 while the most popular route, (Washington, D.C. Dulles Intl - Chicago O'Hare Intl) is currently priced at $147.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Washington, D.C. to Illinois 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 Washington, D.C. to Illinois?

    Currently, August is the cheapest month in which you can book a flight from Washington, D.C. to Illinois (average of $245). Flying from Washington, D.C. to Illinois in March is currently the most expensive (average of $317). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Washington, D.C. to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Orlando flights
Reagan-National to Miami flights
Reagan-National to Orlando flights
Dulles Intl to Miami flights
Dulles Intl to Las Vegas flights
Dulles Intl to Dallas/Fort Worth flights
Dulles Intl to Fort Lauderdale flights
Reagan-National to Los Angeles flights
Reagan-National to Fort Lauderdale flights
Dulles Intl to Los Angeles flights
Dulles Intl to Seattle flights
Dulles Intl to Tampa flights
Reagan-National to Dallas/Fort Worth flights
Reagan-National to Las Vegas flights
Dulles Intl to New Orleans flights
Dulles Intl to Sky Harbor Intl flights
Dulles Intl to Atlanta flights
Reagan-National to Denver flights
Dulles Intl to Salt Lake City flights
Reagan-National to San Francisco flights
Reagan-National to Atlanta flights
Dulles Intl to Denver flights
Reagan-National to Hobby flights
Reagan-National to Tampa flights
Dulles Intl to O'Hare Intl flights
Reagan-National to Boston flights
Dulles Intl to Honolulu flights
Dulles Intl to San Francisco flights
Reagan-National to Seattle flights
Reagan-National to New Orleans flights
Reagan-National to Salt Lake City flights
Reagan-National to O'Hare Intl flights
Dulles Intl to West Palm Beach flights
Reagan-National to Sky Harbor Intl flights
Dulles Intl to Hobby flights
Dulles Intl to George Bush Intcntl flights
Reagan-National to George Bush Intcntl flights
Dulles Intl to Boston flights
Dulles Intl to San Diego flights
Dulles Intl to Fort Myers flights
Dulles Intl to Austin flights
Reagan-National to West Palm Beach flights
Reagan-National to Nashville flights
Dulles Intl to John F Kennedy Intl flights
Reagan-National to John F Kennedy Intl flights
Dulles Intl to Newark flights
Dulles Intl to Key West flights
Reagan-National to Honolulu flights
Dulles Intl to Nashville flights
Reagan-National to Fort Myers flights

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

Discover the top 6 airlines that operate flights from Washington, D.C. to Illinois. 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 20, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$58Average$176FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$101Average$193FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$124Average$418FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$152Average$393FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$157Average$299FlexibilityNo cancel feeOn-time63%
DeltaCheapest$175Average$328FlexibilityNo cancel feeOn-timeN/A
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.