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$63+ 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 9/4. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — ORD
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
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 junio 12, 2025.

Round-trip from

$118
(Kiwi.com)

One-way from

$63
(FlightHub)

Popular in

April

Cheapest in

September

Average price

$267

Good round-trip deal

$154 or less

Good one-way deal

$79 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. 6% potential increase in price ($17 potential increase over avg. RT price).
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Cheapest flight prices on average. 0% potential price decrease ($2 potential savings vs. average RT price).
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Average for round-trip flights in June 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 junio 12, 2025.

This Kiwi.com deal was found by Cheapflights users on 6/11. 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.
mié. 7/28:25 amBWI - ORD
1 stop11h 19mSpirit Airlines
jue. 7/104:37 pmORD - BWI
Nonstop1h 54mSpirit Airlines
Deal found 6/11$118
This Kiwi.com deal was found by Cheapflights users on 6/10. 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.
jue. 8/147:38 amBWI - ORD
Nonstop2h 00mMultiple Airlines
lun. 8/187:45 amORD - BWI
Nonstop2h 06mMultiple Airlines
Deal found 6/10$120
This Cheapflightsfares deal was found by Cheapflights users on 6/12. 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.
mié. 8/66:31 pmBWI - MDW
Nonstop2h 05mFrontier
lun. 8/1112:50 pmMDW - BWI
Nonstop1h 56mFrontier
Deal found 6/12$122
This Cheapflightsfares deal was found by Cheapflights users on 6/11. 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.
vie. 9/1910:58 pmBWI - ORD
Nonstop2h 16mFrontier
lun. 9/227:10 pmORD - BWI
Nonstop2h 03mFrontier
Deal found 6/11$125
This Southwest deal was found by Cheapflights users on 6/10. 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.
mié. 8/136:40 amBWI - MDW
Nonstop2h 00mSouthwest
mié. 8/1311:45 amMDW - BWI
Nonstop1h 50mSouthwest
Deal found 6/10$139
This Southwest deal was found by Cheapflights users on 6/11. 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.
sáb. 8/2310:35 amBWI - ORD
Nonstop2h 15mSouthwest
sáb. 8/231:30 pmORD - BWI
Nonstop2h 00mSouthwest
Deal found 6/11$139
This Mytrip deal was found by Cheapflights users on 6/11. 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.
jue. 7/102:50 pmBWI - STL
1 stop20h 02mSpirit Airlines
dom. 7/1310:47 amSTL - BWI
1 stop19h 52mSpirit Airlines
Deal found 6/11$140
This United Airlines deal was found by Cheapflights users on 6/11. 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.
jue. 8/146:15 amBWI - ORD
Nonstop2h 15mUnited Airlines
mar. 8/1910:45 amORD - BWI
Nonstop2h 03mUnited Airlines
Deal found 6/11$148
This Southwest deal was found by Cheapflights users on 6/11. 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.
lun. 10/276:00 amDCA - MDW
Nonstop2h 00mSouthwest
mar. 10/287:40 amMDW - DCA
1 stop4h 10mSouthwest
Deal found 6/11$163
This United Airlines deal was found by Cheapflights users on 6/11. 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.
jue. 8/146:25 amDCA - ORD
Nonstop2h 14mUnited Airlines
mar. 8/198:50 amORD - DCA
1 stop4h 32mUnited Airlines
Deal found 6/11$167
This American Airlines deal was found by Cheapflights users on 6/10. 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.
mié. 8/272:15 pmDCA - ORD
Nonstop2h 13mAmerican Airlines
dom. 8/316:06 amORD - DCA
Nonstop1h 54mAmerican Airlines
Deal found 6/10$168
This United Airlines deal was found by Cheapflights users on 6/12. 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.
jue. 8/285:10 pmIAD - ORD
Nonstop2h 15mUnited Airlines
dom. 8/3110:43 amORD - IAD
Nonstop2h 06mUnited Airlines
Deal found 6/12$168

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 junio 12, 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 - ORD

BWIORD

Baltimore/Washington

mié. 7/2

8:25 am-6:44 pm

1 stop11h 19m

Chicago O'Hare Intl

jue. 7/10

4:37 pm-7:31 pm

Nonstop1h 54m

$118

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

jue. 8/14

7:38 am-8:38 am

Nonstop2h 00m

Chicago O'Hare Intl

lun. 8/18

7:45 am-10:51 am

Nonstop2h 06m

$120

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

mié. 8/6

6:31 pm-7:36 pm

Nonstop2h 05m

Chicago Midway

lun. 8/11

12:50 pm-3:46 pm

Nonstop1h 56m

$122

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

lun. 8/11

11:36 am-12:58 pm

Nonstop2h 22m

Chicago O'Hare Intl

dom. 8/17

7:45 am-10:51 am

Nonstop2h 06m

$125

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

mié. 8/13

6:40 am-7:40 am

Nonstop2h 00m

Chicago Midway

mié. 8/13

11:45 am-2:35 pm

Nonstop1h 50m

$139

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

sáb. 8/23

6:15 am-7:30 am

Nonstop2h 15m

Chicago O'Hare Intl

sáb. 8/30

7:00 am-9:55 am

Nonstop1h 55m

$139

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

jue. 7/10

2:50 pm-9:52 am

1 stop20h 02m

Lambert-St Louis

dom. 7/13

10:47 am-7:39 am

1 stop19h 52m

$140

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

jue. 8/14

6:25 am-7:39 am

Nonstop2h 14m

Chicago O'Hare Intl

mar. 8/19

8:50 am-2:22 pm

1 stop4h 32m

$167

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

jue. 8/14

9:00 pm-10:00 pm

Nonstop2h 00m

Chicago Midway

mar. 8/19

9:55 am-2:25 pm

1 stop3h 30m

$167

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

mié. 8/27

2:15 pm-3:28 pm

Nonstop2h 13m

Chicago O'Hare Intl

dom. 8/31

6:06 am-9:00 am

Nonstop1h 54m

$168

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

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 junio 12, 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 junio 12, 2025.

The most flights from WAS to USIL are scheduled on a Thursday (81 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (40 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 junio 12, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest and Delta 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,946 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
JetBlue
7.3
Good
2,925 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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?

    $63 is the cheapest one-way deal found within the past few days, from Spirit Airlines. You may also be able to find cheap deals on Frontier and Southwest, with prices starting from $73 and $79, respectively.

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

    While some choose either Washington, D.C. Reagan-National - Chicago O'Hare Intl or Washington, D.C. Dulles Intl - Chicago O'Hare Intl, Baltimore/Washington - 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 (96%), Cathay Pacific (88%) and Spirit Airlines (88%).

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

    On average you can expect to pay $977 for a flight from Washington, D.C. to Illinois. The cheapest flight overall is $72 while the most popular route, (Baltimore/Washington - Chicago O'Hare Intl) is currently priced at $98.

  • 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.
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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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$55Average$158FlexibilityNo cancel feeOn-time65%
FrontierCheapest$58Average$176FlexibilityNo cancel feeOn-time62%
DeltaCheapest$98Average$329FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$145Average$412FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$155Average$381FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$166Average$298FlexibilityNo cancel feeOn-time63%

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