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$66+ 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 10/29. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — ORD
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
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 September 15, 2025.

Round-trip from

$138
(SmartFares)

One-way from

$66
(American Airlines)

Popular in

April

Cheapest in

September

Average price

$217

Good round-trip deal

$271 or less

Good one-way deal

$154 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. 8% potential increase in price ($21 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 September 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 September 15, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/14. 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.
Wed 10/159:00 amIAD - MDW
1 stop5h 38mFrontier
Tue 10/218:05 amMDW - IAD
1 stop10h 41mFrontier
Deal found 9/14$140
This Kiwi.com deal was found by Cheapflights users on 9/13. 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 10/288:47 amIAD - MDW
1 stop28h 54mFrontier
Tue 11/41:56 pmMDW - IAD
1 stop5h 24mFrontier
Deal found 9/13$141
This Southwest deal was found by Cheapflights users on 9/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/173:20 pmDCA - MDW
Nonstop2h 10mSouthwest
Tue 1/131:25 pmMDW - DCA
2 stops7h 35mSouthwest
Deal found 9/12$141
This United Airlines deal was found by Cheapflights users on 9/12. 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.
Sat 10/47:25 amDCA - ORD
Nonstop2h 14mUnited Airlines
Sat 10/41:42 pmORD - DCA
1 stop5h 54mUnited Airlines
Deal found 9/12$143
This Gotogate deal was found by Cheapflights users on 9/14. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/257:15 amIAD - ORD
1 stop5h 20mFrontier
Mon 10/2712:23 pmORD - IAD
1 stop9h 59mFrontier
Deal found 9/14$143
This Gotogate deal was found by Cheapflights users on 9/14. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/254:22 pmIAD - MDW
1 stop7h 25mFrontier
Mon 10/2712:03 pmMDW - IAD
1 stop10h 19mFrontier
Deal found 9/14$143
This Southwest deal was found by Cheapflights users on 9/13. 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.
Mon 10/206:00 amDCA - MDW
Nonstop2h 00mSouthwest
Wed 10/225:35 pmMDW - DCA
1 stop4h 50mSouthwest
Deal found 9/13$143
This Frontier deal was found by Cheapflights users on 9/14. 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 10/26:10 amIAD - ORD
1 stop5h 21mFrontier
Sun 10/58:05 amORD - IAD
1 stop12h 19mFrontier
Deal found 9/14$144
This Gotogate deal was found by Cheapflights users on 9/13. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/257:14 pmIAD - MDW
1 stop14h 39mFrontier
Fri 9/265:15 pmMDW - IAD
1 stop6h 00mFrontier
Deal found 9/13$144
This Southwest deal was found by Cheapflights users on 9/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/176:05 amDCA - ORD
1 stop7h 10mSouthwest
Tue 1/131:45 pmORD - DCA
1 stop4h 30mSouthwest
Deal found 9/12$145
This Booking.com deal was found by Cheapflights users on 9/13. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/267:14 pmIAD - ORD
1 stop21h 03mFrontier
Sun 9/288:49 pmORD - IAD
1 stop20h 35mFrontier
Deal found 9/13$145
This Booking.com deal was found by Cheapflights users on 9/15. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/277:14 pmIAD - MDW
1 stop15h 04mFrontier
Sat 10/411:21 amMDW - IAD
1 stop6h 08mFrontier
Deal found 9/15$145

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 September 15, 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

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Sat 10/4

7:25 am-8:39 am

Nonstop2h 14m

Chicago O'Hare Intl

Sat 10/4

1:42 pm-8:36 pm

1 stop5h 54m

$143

Washington, D.C.Chicago

IAD - MDW

IADMDW

Washington, D.C. Dulles Intl

Sat 10/11

4:22 pm-10:47 pm

1 stop7h 25m

Chicago Midway

Wed 10/15

8:05 am-7:46 pm

1 stop10h 41m

$144

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

Mon 10/20

3:10 pm-4:10 pm

Nonstop2h 00m

Chicago Midway

Wed 10/22

7:40 am-4:15 pm

2 stops7h 35m

$148

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

Thu 10/23

3:10 pm-4:10 pm

Nonstop2h 00m

Chicago Midway

Mon 10/27

12:10 pm-3:00 pm

Nonstop1h 50m

$149

Washington, D.C.Chicago

IAD - MDW

IADMDW

Washington, D.C. Dulles Intl

Sun 9/21

7:09 pm-7:23 am

1 stop13h 14m

Chicago Midway

Thu 9/25

6:20 am-12:55 pm

1 stop5h 35m

$169

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Thu 10/2

6:00 am-10:19 am

1 stop5h 19m

Chicago O'Hare Intl

Mon 10/6

9:42 am-4:57 pm

1 stop6h 15m

$197

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

Mon 11/3

2:45 pm-8:30 pm

1 stop6h 45m

Chicago Midway

Fri 11/7

6:00 am-8:45 am

Nonstop1h 45m

$200

Washington, D.C.St. Louis

DCA - STL

DCASTL

Washington, D.C. Reagan-National

Tue 2/24

4:12 pm-5:45 pm

Nonstop2h 33m

Lambert-St Louis

Wed 2/25

6:16 pm-9:30 pm

Nonstop2h 14m

$203

Washington, D.C.Chicago

IAD - MDW

IADMDW

Washington, D.C. Dulles Intl

Wed 9/24

9:15 am-3:58 pm

1 stop7h 43m

Chicago Midway

Mon 9/29

8:15 am-12:15 am

2 stops15h 00m

$204

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Fri 11/14

4:55 pm-8:52 pm

1 stop4h 57m

Chicago O'Hare Intl

Sat 11/15

6:44 am-2:50 pm

1 stop7h 06m

$213

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

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 September 15, 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 September 15, 2025.

The most flights from USDC to USIL are scheduled on a Monday (32 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (22 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 September 15, 2025.
See what other customers who have flown with Southwest, United Airlines, and American 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
4,242 reviews

Comfort

8.0

Entertainment

7.5

Overall

8.0

Crew

8.6

Food

7.0

Boarding

8.1

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
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Entertainment

7.5

Overall

8.0

Crew

8.6

Food

7.0

Boarding

8.1

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
8,929 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Entertainment

7.5

Overall

8.0

Crew

8.6

Food

7.0

Boarding

8.1

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
4,242 reviews

Comfort

8.0

Entertainment

7.5

Overall

8.0

Crew

8.6

Food

7.0

Boarding

8.1

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
8,015 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Entertainment

7.5

Overall

8.0

Crew

8.6

Food

7.0

Boarding

8.1

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
3,172 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Entertainment

7.5

Overall

8.0

Crew

8.6

Food

7.0

Boarding

8.1

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 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.

  • How long is the flight from District of Columbia to Illinois?

    Airlines like United Airlines, Frontier, and Southwest fly from District of Columbia to Illinois in about 2h. The time it takes to get you to your destination can typically vary by up to 5h 25m. District of Columbia and Illinois are separated by a distance of 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 District of Columbia to Illinois one-way?

    $78 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Southwest and United Airlines, with prices starting from $83 and $85, 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.

See more FAQs

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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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$46Average$123FlexibilityNo cancel feeOn-time65%
FrontierCheapest$62Average$188FlexibilityNo cancel feeOn-time62%
DeltaCheapest$98Average$400FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$154Average$403FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$157Average$295FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$158Average$380FlexibilityNo cancel feeOn-time69%

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