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$83+ Cheap flights from District of Columbia 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 8/5. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — ORD
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
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Cheap flight deals from District of Columbia to Illinois

Keep the following information in mind while searching for District of Columbia to Illinois flight deals. Data was last updated July 31, 2025.

Round-trip from

$174
(Mytrip)

One-way from

$83
(Cheapflightsfares)

Popular in

April

Cheapest in

September

Average price

$266

Good round-trip deal

$220 or less

Good one-way deal

$155 or less
From District of Columbia to Illinois
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One-way flight from District of Columbia to Illinois
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Highest demand for flights based on searches. 7% potential increase in price ($19 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 July 2025
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Price to beat on a round-trip flight from District of Columbia to Illinois.
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Price to beat on a one-way flight from District of Columbia to Illinois.
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Find flight deals from District of Columbia to Illinois

Cheapest flights from District of Columbia to Illinois
Explore the most affordable flight options available from District of Columbia to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 31, 2025.

This Mytrip deal was found by Cheapflights users on 7/29. 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.
Mon 8/181:22 pmIAD - MDW
1 stop5h 55mAllegiant Air
Fri 8/229:32 amMDW - IAD
1 stop4h 51mAllegiant Air
Deal found 7/29$174
This Mytrip deal was found by Cheapflights users on 7/30. 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.
Sat 9/137:14 pmIAD - MDW
1 stop15h 04mFrontier
Sat 9/2010:51 amMDW - IAD
1 stop6h 33mFrontier
Deal found 7/30$177
This Cheapflightsfares deal was found by Cheapflights users on 7/29. 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.
Sun 9/216:10 amIAD - ORD
1 stop5h 21mFrontier
Sat 9/275:40 pmORD - IAD
1 stop5h 15mFrontier
Deal found 7/29$195
This JetBlue deal was found by Cheapflights users on 7/31. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/266:30 amDCA - ORD
1 stop5h 48mJetBlue
Wed 9/39:42 amORD - DCA
1 stop7h 18mJetBlue
Deal found 7/31$203
This Frontier deal was found by Cheapflights users on 7/31. 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.
Sat 8/161:37 pmIAD - STL
1 stop11h 10mFrontier
Mon 8/182:37 pmSTL - IAD
1 stop14h 57mFrontier
Deal found 7/31$208
This American Airlines deal was found by Cheapflights users on 7/30. 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.
Sat 8/237:00 amDCA - ORD
Nonstop2h 22mAmerican Airlines
Sat 8/2310:15 amORD - DCA
1 stop4h 44mAmerican Airlines
Deal found 7/30$209
This United Airlines deal was found by Cheapflights users on 7/29. 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.
Tue 8/2612:00 pmDCA - ORD
Nonstop2h 13mUnited Airlines
Tue 9/27:00 amORD - DCA
Nonstop1h 58mUnited Airlines
Deal found 7/29$217
This United Airlines deal was found by Cheapflights users on 7/30. 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 8/278:40 amIAD - STL
Nonstop2h 22mUnited Airlines
Wed 9/38:15 amSTL - IAD
Nonstop2h 10mUnited Airlines
Deal found 7/30$217
This American Airlines deal was found by Cheapflights users on 7/30. 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 9/108:30 amDCA - STL
Nonstop2h 51mAmerican Airlines
Sat 9/137:01 amSTL - DCA
Nonstop2h 02mAmerican Airlines
Deal found 7/30$217
This Southwest deal was found by Cheapflights users on 7/31. 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.
Sat 8/308:25 amDCA - MDW
Nonstop2h 00mSouthwest
Sat 9/612:45 pmMDW - DCA
Nonstop1h 55mSouthwest
Deal found 7/31$217
This Frontier deal was found by Cheapflights users on 7/30. 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.
Sat 9/61:00 pmDCA - ORD
1 stop9h 28mFrontier
Wed 9/107:20 amORD - DCA
1 stop13h 39mFrontier
Deal found 7/30$218
This CheapOair deal was found by Cheapflights users on 7/31. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/151:00 pmDCA - STL
1 stop21h 07mFrontier
Sat 10/187:52 pmSTL - DCA
1 stop15h 12mFrontier
Deal found 7/31$218

Cheapflights Fare Finder

 
Customize your flight search to find flights from District of Columbia 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 July 31, 2025.
Use the filters below to find and compare flights from District of Columbia to Illinois that are best for you.

Fly from

District of Columbia

Fly to

Illinois

Route

Depart

Return

Price

Washington, D.C.Chicago

IAD - MDW

IADMDW

Washington, D.C. Dulles Intl

Mon 8/18

1:22 pm-6:17 pm

1 stop5h 55m

Chicago Midway

Fri 8/22

9:32 am-3:23 pm

1 stop4h 51m

$174

Washington, D.C.Chicago

IAD - MDW

IADMDW

Washington, D.C. Dulles Intl

Sat 9/13

7:14 pm-9:18 am

1 stop15h 04m

Chicago Midway

Sat 9/20

10:51 am-6:24 pm

1 stop6h 33m

$177

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Sun 9/21

6:10 am-10:31 am

1 stop5h 21m

Chicago O'Hare Intl

Sat 9/27

5:40 pm-11:55 pm

1 stop5h 15m

$195

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Tue 8/26

6:30 am-11:18 am

1 stop5h 48m

Chicago O'Hare Intl

Wed 9/3

9:42 am-6:00 pm

1 stop7h 18m

$203

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Sat 8/16

1:37 pm-11:47 pm

1 stop11h 10m

Lambert-St Louis

Mon 8/18

2:37 pm-6:34 am

1 stop14h 57m

$208

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Sat 8/23

7:00 am-8:22 am

Nonstop2h 22m

Chicago O'Hare Intl

Sat 8/23

10:15 am-3:59 pm

1 stop4h 44m

$209

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Tue 8/26

12:00 pm-1:13 pm

Nonstop2h 13m

Chicago O'Hare Intl

Tue 9/2

7:00 am-9:58 am

Nonstop1h 58m

$217

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

Sat 8/30

8:25 am-9:25 am

Nonstop2h 00m

Chicago Midway

Sat 9/6

12:45 pm-3:40 pm

Nonstop1h 55m

$217

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Wed 8/27

8:40 am-10:02 am

Nonstop2h 22m

Lambert-St Louis

Wed 9/3

8:15 am-11:25 am

Nonstop2h 10m

$217

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Wed 9/10

8:30 am-10:21 am

Nonstop2h 51m

Lambert-St Louis

Sat 9/13

7:01 am-10:03 am

Nonstop2h 02m

$217

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 60 results
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Best time to book a flight from District of Columbia to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from District of Columbia 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 District of Columbia to Illinois

What is the cheapest month to book a flight from District of Columbia to Illinois?

Currently, August is the cheapest month in which you can book a flight from District of Columbia to Illinois (average of $245). Flying from District of Columbia 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 DC to IL?

Find hourly flight availability from District of Columbia 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 July 31, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from District of Columbia to Illinois as you normally would.

Weekly flight availability from District of Columbia to Illinois

Explore weekly flight availability from District of Columbia 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 July 31, 2025.

The most flights from USDC to USIL are scheduled on a Thursday (22 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (12 on average).

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 July 31, 2025.
See what other customers who have flown with Southwest, Delta, and Avelo Airlines from District of Columbia to Illinois have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,246 reviews

Overall

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Southwest
8.0
Very good
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Overall

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Delta
8.0
Very good
7,981 reviews
Southwest
8.0
Very good
4,246 reviews

Overall

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Avelo Airlines
7.5
Good
Southwest
8.0
Very good
4,246 reviews

Overall

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
United Airlines
7.4
Good
8,900 reviews
Southwest
8.0
Very good
4,246 reviews

Overall

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,246 reviews

Overall

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

Related info for your journey

Find useful and relevant information for your journey from District of Columbia 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 District of Columbia to Illinois one-way?

    $83 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Avelo Airlines and Delta, with prices starting from $93 and $100, respectively.

  • Can I find deals for flights from District of Columbia to Illinois that include hotel bookings?

    Yes. In addition to deals on District of Columbia to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from District of Columbia to Illinois?

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

  • Can I find deals for business class flights from District of Columbia to Illinois?

    Yes. Cheapflights offers flight deals from District of Columbia 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 District of Columbia to Illinois?

    Currently, August is the cheapest month in which you can book a flight from District of Columbia to Illinois (average of $245). Flying from District of Columbia 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.

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Alternative routes for District of Columbia 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 District of Columbia to Illinois

Discover the top 6 airlines that operate flights from District of Columbia 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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$52Average$152FlexibilityNo cancel feeOn-time65%
FrontierCheapest$61Average$188FlexibilityNo cancel feeOn-time62%
DeltaCheapest$98Average$380FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$152Average$415FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$157Average$292FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$157Average$380FlexibilityNo cancel feeOn-time69%

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