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$69+ 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 10/24. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — ORD
Aug 30 — Sep 61
Sat 8/30
Sat 9/6
1 adult, Economy
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Cheap flight deals from Washington, D.C. to Illinois

Keep the following information in mind while searching for Washington, D.C. to Illinois flight deals. Data was last updated August 25, 2025.

Round-trip from

$106
(Priceline)

One-way from

$69
(Priceline)

Popular in

April

Cheapest in

September

Average price

$251

Good round-trip deal

$152 or less

Good one-way deal

$99 or less
From Washington, D.C. (WAS) to Illinois
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One-way flight from Washington, D.C. (WAS) to Illinois
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Highest demand for flights based on searches. 7% potential increase in price ($20 potential increase over avg. RT price).
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Cheapest flight prices on average. 0% potential price decrease ($3 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Price to beat on a round-trip flight from Washington, D.C. (WAS) to Illinois.
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Price to beat on a one-way flight from Washington, D.C. (WAS) to Illinois.
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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 August 25, 2025.

This Priceline deal was found by Cheapflights users on 8/25. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/55:40 pmBWI - MDW
Nonstop2h 03mFrontier
Mon 9/85:15 pmMDW - BWI
1 stop6h 02mFrontier
Deal found 8/25$106
This Frontier deal was found by Cheapflights users on 8/25. 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 9/59:59 pmBWI - ORD
Nonstop2h 21mFrontier
Mon 9/86:00 amORD - BWI
1 stop10h 42mFrontier
Deal found 8/25$107
This Priceline deal was found by Cheapflights users on 8/25. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/168:12 amBWI - MDW
1 stop8h 46mFrontier
Fri 9/191:49 pmMDW - BWI
Nonstop2h 01mFrontier
Deal found 8/25$110
This Priceline deal was found by Cheapflights users on 8/25. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/410:23 amBWI - ORD
1 stop10h 21mFrontier
Fri 9/56:11 pmORD - BWI
Nonstop2h 03mFrontier
Deal found 8/25$110
This Mytrip deal was found by Cheapflights users on 8/25. 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 9/125:40 pmBWI - MDW
Nonstop2h 03mFrontier
Sun 9/146:21 amMDW - BWI
1 stop12h 44mFrontier
Deal found 8/25$111
This Priceline deal was found by Cheapflights users on 8/23. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/115:40 pmBWI - MDW
Nonstop2h 03mFrontier
Mon 9/155:15 pmMDW - BWI
1 stop6h 02mFrontier
Deal found 8/23$112
This Frontier deal was found by Cheapflights users on 8/24. 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 9/119:59 pmBWI - ORD
Nonstop2h 21mFrontier
Tue 9/1611:45 amORD - BWI
1 stop6h 22mFrontier
Deal found 8/24$112
This Mytrip deal was found by Cheapflights users on 8/23. 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.
Thu 9/185:40 pmBWI - MDW
Nonstop2h 03mFrontier
Sun 9/216:21 amMDW - BWI
1 stop12h 44mFrontier
Deal found 8/23$113
This Kiwi.com deal was found by Cheapflights users on 8/25. 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 9/166:50 amBWI - ORD
1 stop11h 49mSpirit Airlines
Sun 9/216:10 amORD - BWI
Nonstop1h 52mSpirit Airlines
Deal found 8/25$113
This FlightHub deal was found by Cheapflights users on 8/25. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/411:43 amBWI - MDW
1 stop5h 15mFrontier
Mon 9/81:49 pmMDW - BWI
Nonstop2h 01mFrontier
Deal found 8/25$114
This Cheapflightsfares deal was found by Cheapflights users on 8/23. 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 9/261:17 pmBWI - ORD
1 stop9h 41mSpirit Airlines
Sun 9/286:10 amORD - BWI
Nonstop1h 52mSpirit Airlines
Deal found 8/23$114
This Mytrip deal was found by Cheapflights users on 8/24. 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.
Thu 9/115:40 pmBWI - MDW
Nonstop2h 03mFrontier
Sun 9/146:21 amMDW - BWI
1 stop24h 08mFrontier
Deal found 8/24$115

Cheapflights Fare Finder

 
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 August 25, 2025.
Use the filters below to find and compare flights from Washington, D.C. to Illinois that are best for you.

Fly from

Washington, D.C.

Fly to

Illinois

Route

Depart

Return

Price

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

Fri 9/5

5:40 pm-6:43 pm

Nonstop2h 03m

Chicago Midway

Mon 9/8

5:15 pm-12:17 am

1 stop6h 02m

$107

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

Wed 9/10

8:12 am-3:58 pm

1 stop8h 46m

Chicago Midway

Thu 9/11

1:49 pm-4:50 pm

Nonstop2h 01m

$112

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

Thu 10/2

5:40 pm-6:43 pm

Nonstop2h 03m

Chicago Midway

Tue 10/7

8:05 am-5:20 pm

1 stop8h 15m

$112

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

Fri 9/5

5:40 pm-6:43 pm

Nonstop2h 03m

Chicago Midway

Mon 9/15

1:49 pm-4:50 pm

Nonstop2h 01m

$112

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

Fri 11/14

7:25 pm-8:31 pm

Nonstop2h 06m

Chicago Midway

Mon 11/17

6:20 am-3:35 pm

1 stop8h 15m

$112

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

Thu 9/11

5:40 pm-6:43 pm

Nonstop2h 03m

Chicago Midway

Sat 9/13

10:51 am-9:23 am

1 stop21h 32m

$112

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

Thu 9/11

5:40 pm-6:43 pm

Nonstop2h 03m

Chicago Midway

Sun 9/14

6:21 am-8:05 pm

1 stop12h 44m

$112

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

Fri 10/31

7:25 pm-8:31 pm

Nonstop2h 06m

Chicago Midway

Sun 11/2

5:40 am-8:36 am

Nonstop1h 56m

$112

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

Thu 10/2

5:40 pm-6:43 pm

Nonstop2h 03m

Chicago Midway

Sat 10/4

10:51 am-9:23 am

1 stop21h 32m

$112

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

Sun 9/21

5:40 pm-6:43 pm

Nonstop2h 03m

Chicago Midway

Thu 9/25

4:56 pm-12:17 am

1 stop6h 21m

$112

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/24

Showing 1-10 of 60 results
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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.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. to Illinois

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 $321). 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 August 25, 2025.

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 August 25, 2025.

The most flights from WAS to USIL are scheduled on a Friday (82 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (66 on average).

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

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 August 25, 2025.
Peruse reviews from past customers who have flown with Southwest, United Airlines, and American 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
8.0
Very good
4,243 reviews

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Crew

8.6

Overall

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,243 reviews
Southwest
8.0
Very good
4,243 reviews

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Crew

8.6

Overall

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
8,940 reviews
Southwest
8.0
Very good
4,243 reviews

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Crew

8.6

Overall

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,243 reviews

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Crew

8.6

Overall

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Spirit Airlines
6.3
Okay
8,029 reviews
Southwest
8.0
Very good
4,243 reviews

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Crew

8.6

Overall

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Frontier
5.8
Fair
3,201 reviews
Southwest
8.0
Very good
4,243 reviews

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Crew

8.6

Overall

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

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.

  • How long is the flight from Washington, D.C. to Illinois?

    A quick flight from Washington, D.C. to Illinois can take about 2h. Frontier provides one of the quickest options available for as low as $217. The distance from Washington, D.C. to Illinois is about 599 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    $69 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Spirit Airlines and Southwest, with prices starting from $69 and $70, respectively.

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

    While some choose either Washington, D.C. Dulles Intl - Chicago O'Hare Intl or Baltimore/Washington - Chicago O'Hare Intl, Washington, D.C. Reagan-National - 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 Egyptair (84%), Air China (82%) and Air Canada (72%).

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

    On average you can expect to pay $1,090 for a flight from Washington, D.C. to Illinois. The cheapest flight overall is $113 while the most popular route, (Washington, D.C. Reagan-National - Chicago O'Hare Intl) is currently priced at $173.

  • 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 $321). 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

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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 Dallas/Fort Worth flights
Reagan-National to O'Hare Intl flights
Dulles Intl to Miami flights
Dulles Intl to O'Hare Intl flights
Reagan-National to Los Angeles flights
Dulles Intl to Las Vegas flights
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Dulles Intl to Los Angeles flights
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Dulles Intl to George Bush Intcntl flights
Reagan-National to George Bush Intcntl flights
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Reagan-National to Midway flights
Reagan-National to Nashville flights
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Dulles Intl to Charlotte flights
Reagan-National to John F Kennedy Intl flights
Reagan-National to San Diego 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 August 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$46Average$135FlexibilityNo cancel feeOn-time65%
FrontierCheapest$62Average$190FlexibilityNo cancel feeOn-time62%
DeltaCheapest$98Average$379FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$154Average$405FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$157Average$293FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$158Average$397FlexibilityNo cancel feeOn-time69%

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