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District of Columbia

$87+ Cheap flights from Illinois to District of Columbia

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 8/22. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BWI
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
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Cheap flight deals from Illinois to District of Columbia

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

Round-trip from

$177
(Gotogate)

One-way from

$87
(Mytrip)

Popular in

January

Cheapest in

August

Average price

$229

Good round-trip deal

$157 or less

Good one-way deal

$114 or less
From Illinois to District of Columbia
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One-way flight from Illinois to District of Columbia
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Highest demand for flights based on searches. 4% potential increase in price ($10 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% 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 Illinois to District of Columbia.
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Price to beat on a one-way flight from Illinois to District of Columbia.
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Find flight deals from Illinois to District of Columbia

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

This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/26:20 amMDW - IAD
1 stop7h 52mFrontier
Tue 8/56:10 amIAD - MDW
1 stop5h 30mFrontier
Deal found 7/29$177
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1011:30 amORD - DCA
Nonstop1h 54mAmerican Airlines
Wed 9/103:28 pmDCA - ORD
1 stop4h 37mAmerican Airlines
Deal found 7/29$193
This SmartFares 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/135:40 pmORD - IAD
1 stop5h 15mFrontier
Sat 9/207:00 amIAD - ORD
1 stop5h 27mFrontier
Deal found 7/30$194
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.
Wed 8/2011:36 amORD - IAD
2 stops22h 08mMultiple Airlines
Thu 8/214:56 pmIAD - ORD
2 stops17h 25mMultiple Airlines
Deal found 7/30$196
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 8/22:52 pmSTL - IAD
1 stop7h 27mFrontier
Sat 8/96:10 amIAD - STL
1 stop8h 49mFrontier
Deal found 7/30$198
This JetBlue 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/171:36 pmORD - DCA
1 stop4h 45mJetBlue
Mon 10/206:25 amDCA - ORD
1 stop6h 45mJetBlue
Deal found 7/29$203
This SmartFares 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/138:25 amORD - DCA
1 stop7h 34mFrontier
Sat 9/201:00 pmDCA - ORD
1 stop9h 28mFrontier
Deal found 7/30$213
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 9/137:01 amSTL - DCA
Nonstop2h 02mAmerican Airlines
Sat 9/202:56 pmDCA - STL
Nonstop2h 19mAmerican Airlines
Deal found 7/30$217
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 8/269:00 amORD - DCA
Nonstop1h 59mUnited Airlines
Tue 9/26:00 pmDCA - ORD
Nonstop2h 15mUnited Airlines
Deal found 7/29$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.
Thu 8/215:30 amMDW - DCA
Nonstop1h 50mSouthwest
Mon 8/256:55 pmDCA - MDW
Nonstop2h 00mSouthwest
Deal found 7/31$217
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/288:50 amORD - IAD
Nonstop2h 05mUnited Airlines
Tue 9/26:40 pmIAD - ORD
Nonstop2h 08mUnited Airlines
Deal found 7/31$217
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/67:29 pmSTL - DCA
1 stop25h 28mFrontier
Tue 8/121:00 pmDCA - STL
1 stop21h 11mFrontier
Deal found 7/29$225

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to District of Columbia 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 Illinois to District of Columbia that are best for you.

Fly from

Illinois

Fly to

District of Columbia

Route

Depart

Return

Price

ChicagoWashington, D.C.

MDW - IAD

MDWIAD

Chicago Midway

Sat 9/13

10:51 am-6:24 pm

1 stop6h 33m

Washington, D.C. Dulles Intl

Sat 9/20

7:14 pm-9:18 am

1 stop15h 04m

$177

ChicagoWashington, D.C.

ORD - DCA

ORDDCA

Chicago O'Hare Intl

Wed 9/10

11:30 am-2:24 pm

Nonstop1h 54m

Washington, D.C. Reagan-National

Wed 9/10

3:28 pm-7:05 pm

1 stop4h 37m

$193

ChicagoWashington, D.C.

ORD - IAD

ORDIAD

Chicago O'Hare Intl

Sat 9/13

5:40 pm-11:55 pm

1 stop5h 15m

Washington, D.C. Dulles Intl

Sat 9/20

7:00 am-11:27 am

1 stop5h 27m

$194

ChicagoWashington, D.C.

ORD - IAD

ORDIAD

Chicago O'Hare Intl

Wed 8/20

11:36 am-10:44 am

2 stops22h 08m

Washington, D.C. Dulles Intl

Thu 8/21

4:56 pm-9:21 am

2 stops17h 25m

$196

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Sat 8/16

2:52 pm-11:26 pm

1 stop7h 34m

Washington, D.C. Dulles Intl

Sat 8/23

6:10 am-1:33 pm

1 stop8h 23m

$198

ChicagoWashington, D.C.

ORD - DCA

ORDDCA

Chicago O'Hare Intl

Fri 10/17

1:36 pm-7:21 pm

1 stop4h 45m

Washington, D.C. Reagan-National

Mon 10/20

6:25 am-12:10 pm

1 stop6h 45m

$203

ChicagoWashington, D.C.

ORD - DCA

ORDDCA

Chicago O'Hare Intl

Sat 9/13

8:25 am-4:59 pm

1 stop7h 34m

Washington, D.C. Reagan-National

Sat 9/20

1:00 pm-9:28 pm

1 stop9h 28m

$213

ChicagoWashington, D.C.

ORD - DCA

ORDDCA

Chicago O'Hare Intl

Tue 8/26

9:00 am-11:59 am

Nonstop1h 59m

Washington, D.C. Reagan-National

Tue 9/2

6:00 pm-7:15 pm

Nonstop2h 15m

$217

ChicagoWashington, D.C.

MDW - DCA

MDWDCA

Chicago Midway

Thu 8/21

5:30 am-8:20 am

Nonstop1h 50m

Washington, D.C. Reagan-National

Mon 8/25

6:55 pm-7:55 pm

Nonstop2h 00m

$217

St. LouisWashington, D.C.

STL - DCA

STLDCA

Lambert-St Louis

Sat 9/13

7:01 am-10:03 am

Nonstop2h 02m

Washington, D.C. Reagan-National

Sat 9/20

2:56 pm-4:15 pm

Nonstop2h 19m

$217

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

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

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

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

Currently, August is the cheapest month in which you can book a flight from Illinois to District of Columbia (average of $241). Flying from Illinois to District of Columbia in March is currently the most expensive (average of $290). 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 IL to DC?

Find hourly flight availability from Illinois to District of Columbia. 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 Illinois to District of Columbia as you normally would.

Weekly flight availability from Illinois to District of Columbia

Explore weekly flight availability from Illinois to District of Columbia. 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 USIL to USDC are scheduled on a Thursday (25 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (11 on average).

Reviews of airlines servicing District of Columbia

Get insights into the airlines that provide service to District of Columbia. 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 District of Columbia. Reviews last updated July 31, 2025.
Read through reviews of airlines operating flights from Illinois to District of Columbia, such as Southwest, Delta, and United Airlines. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,246 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

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

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

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
7,980 reviews
Southwest
8.0
Very good
4,246 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

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

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

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.
JetBlue
7.3
Good
2,914 reviews
Southwest
8.0
Very good
4,246 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

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

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

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 Illinois to District of Columbia. 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 Illinois to District of Columbia one-way?

    The cheapest airline one-way is Allegiant Air, with whom users have recently found tickets for as low as $87. However, be on the lookout for offers from Frontier and JetBlue, as they are both options that can get you from Illinois to District of Columbia for a low price.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Illinois to District of Columbia (average of $241). Flying from Illinois to District of Columbia in March is currently the most expensive (average of $290). 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 Illinois to District of Columbia

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Illinois to District of Columbia

Discover the top 6 airlines that operate flights from Illinois to District of Columbia. 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$42Average$183FlexibilityNo cancel feeOn-time65%
FrontierCheapest$74Average$201FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$127Average$386FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$140Average$284FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$153Average$343FlexibilityNo cancel feeOn-time69%
DeltaCheapest$166Average$378FlexibilityNo cancel feeOn-timeN/A

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