HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
District of Columbia

$89+ 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 4/22. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — IAD
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Illinois to District of Columbia with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$175
(Frontier)

One-way from

$89
(United Airlines)

Popular in

March

Cheapest in

August

Average price

$267

Good round-trip deal

$208 or less

Good one-way deal

$114 or less
Provider with most accurate pricing for Chicago (CHI)-Washington, D.C. (WAS) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Washington, D.C. (WAS) flights.
Search Deals
From Illinois to District of Columbia
Search Deals
One-way flight from Illinois to District of Columbia
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($20 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2025
Search Deals
Price to beat on a round-trip flight from Illinois to District of Columbia.
Search Deals
Price to beat on a one-way flight from Illinois to District of Columbia.
Search Deals

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 February 20, 2025.

This Frontier deal was found by Cheapflights users on 2/19. 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.
Tue 4/1511:00 amMDW - IAD
1 stop7h 44mFrontier
Mon 4/2112:58 pmIAD - MDW
1 stop7h 48mFrontier
Deal found 2/19$175
This American Airlines deal was found by Cheapflights users on 2/19. 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.
Tue 3/186:05 amORD - DCA
Nonstop1h 50mAmerican Airlines
Tue 3/182:54 pmDCA - ORD
Nonstop2h 21mAmerican Airlines
Deal found 2/19$177
This Southwest deal was found by Cheapflights users on 2/19. 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 3/203:20 pmMDW - DCA
Nonstop1h 50mSouthwest
Mon 3/242:45 pmDCA - MDW
Nonstop2h 00mSouthwest
Deal found 2/19$177
This Mytrip deal was found by Cheapflights users on 2/19. 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 4/49:54 amORD - IAD
1 stop6h 11mFrontier
Sun 4/611:45 amIAD - ORD
1 stop21h 05mFrontier
Deal found 2/19$177
This Frontier deal was found by Cheapflights users on 2/20. 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 4/126:45 amORD - DCA
1 stop14h 14mFrontier
Mon 4/141:03 pmDCA - ORD
1 stop12h 34mFrontier
Deal found 2/20$178
This Frontier deal was found by Cheapflights users on 2/20. 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 4/126:45 amMDW - DCA
1 stop14h 14mFrontier
Tue 4/156:00 pmDCA - MDW
1 stop7h 21mFrontier
Deal found 2/20$178
This United Airlines deal was found by Cheapflights users on 2/20. 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.
Mon 3/249:07 pmORD - IAD
Nonstop1h 52mUnited Airlines
Wed 3/268:20 amIAD - ORD
Nonstop2h 18mUnited Airlines
Deal found 2/20$178
This JetBlue deal was found by Cheapflights users on 2/20. 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 4/111:22 pmORD - DCA
1 stop6h 37mJetBlue
Sat 4/197:11 amDCA - ORD
1 stop6h 16mJetBlue
Deal found 2/20$183
This United Airlines deal was found by Cheapflights users on 2/20. 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.
Mon 3/106:00 pmORD - DCA
Nonstop1h 57mUnited Airlines
Wed 3/121:00 pmDCA - ORD
1 stop5h 04mUnited Airlines
Deal found 2/20$188
This KAYAK deal was found by Cheapflights users on 2/20. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/255:45 amORD - DCA
1 stop4h 36mDelta
Wed 3/266:00 amDCA - ORD
1 stop5h 37mDelta
Deal found 2/20$194
This KAYAK deal was found by Cheapflights users on 2/20. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/255:30 pmORD - IAD
1 stop6h 01mDelta
Wed 3/267:35 amIAD - ORD
1 stop7h 10mDelta
Deal found 2/20$194
This Delta deal was found by Cheapflights users on 2/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/66:00 amMDW - IAD
1 stop4h 57mDelta
Mon 3/106:00 amIAD - MDW
1 stop3h 45mDelta
Deal found 2/20$197

Find flights from Illinois to District of Columbia within your budget

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 February 20, 2025.

Fly from

Illinois

Fly to

District of Columbia

Route

Depart

Return

Price

ChicagoWashington, D.C.

MDW - IAD

MDWIAD

Chicago Midway

Tue 4/15

11:00 am-7:44 pm

1 stop7h 44m

Washington, D.C. Dulles Intl

Mon 4/21

12:58 pm-7:46 pm

1 stop7h 48m

$175

ChicagoWashington, D.C.

ORD - DCA

ORDDCA

Chicago O'Hare Intl

Tue 3/18

6:05 am-8:55 am

Nonstop1h 50m

Washington, D.C. Reagan-National

Tue 3/18

2:54 pm-4:15 pm

Nonstop2h 21m

$177

ChicagoWashington, D.C.

MDW - DCA

MDWDCA

Chicago Midway

Thu 3/20

3:20 pm-6:10 pm

Nonstop1h 50m

Washington, D.C. Reagan-National

Mon 3/24

2:45 pm-3:45 pm

Nonstop2h 00m

$177

ChicagoWashington, D.C.

ORD - IAD

ORDIAD

Chicago O'Hare Intl

Fri 4/4

9:54 am-5:05 pm

1 stop6h 11m

Washington, D.C. Dulles Intl

Sun 4/6

11:45 am-7:50 am

1 stop21h 05m

$177

ChicagoWashington, D.C.

ORD - IAD

ORDIAD

Chicago O'Hare Intl

Mon 3/24

9:07 pm-11:59 pm

Nonstop1h 52m

Washington, D.C. Dulles Intl

Wed 3/26

8:20 am-9:38 am

Nonstop2h 18m

$178

ChicagoWashington, D.C.

ORD - DCA

ORDDCA

Chicago O'Hare Intl

Sat 4/12

6:45 am-9:59 pm

1 stop14h 14m

Washington, D.C. Reagan-National

Mon 4/14

1:03 pm-12:37 am

1 stop12h 34m

$178

ChicagoWashington, D.C.

MDW - DCA

MDWDCA

Chicago Midway

Sat 4/12

6:45 am-9:59 pm

1 stop14h 14m

Washington, D.C. Reagan-National

Tue 4/15

6:00 pm-12:21 am

1 stop7h 21m

$178

ChicagoWashington, D.C.

ORD - DCA

ORDDCA

Chicago O'Hare Intl

Fri 4/11

1:22 pm-8:59 pm

1 stop6h 37m

Washington, D.C. Reagan-National

Sat 4/19

7:11 am-12:27 pm

1 stop6h 16m

$183

ChicagoWashington, D.C.

ORD - DCA

ORDDCA

Chicago O'Hare Intl

Mon 3/10

6:00 pm-8:57 pm

Nonstop1h 57m

Washington, D.C. Reagan-National

Wed 3/12

1:00 pm-5:04 pm

1 stop5h 04m

$188

ChicagoWashington, D.C.

ORD - DCA

ORDDCA

Chicago O'Hare Intl

Tue 3/25

5:45 am-11:21 am

1 stop4h 36m

Washington, D.C. Reagan-National

Wed 3/26

6:00 am-10:37 am

1 stop5h 37m

$194

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 60 results
1
2
3
...
6

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.

Travel insights for flights from Illinois to District of Columbia

Get recent, data-driven insights about flights from Illinois to District of Columbia including ideal travel times, pricing trends, and more.

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 $309). Flying from Illinois to District of Columbia in June is currently the most expensive (average of $389). 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 February 20, 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 February 20, 2025.

The most flights from USIL to USDC are scheduled on a Thursday (20 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (8 on average).

Rainfall in District of Columbia by month

Plan your trip to District of Columbia by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in District of Columbia ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit District of Columbia when rainfall is around 2.6 in.

Temperature in District of Columbia by month

Plan your trip to District of Columbia by taking into account the average temperature totals by month.

If weather is an important factor for your trip to District of Columbia, 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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

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 February 20, 2025.
See what other customers who have flown with Southwest, Alaska Airlines and Delta from Illinois to District of Columbia have to say. 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
8.1
Very good
4,411 reviews

Crew

8.7

Overall

8.1

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Food

7.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Southwest
8.1
Very good
4,411 reviews
Southwest
8.1
Very good
4,411 reviews

Crew

8.7

Overall

8.1

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Food

7.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Alaska Airlines
8.0
Very good
9,692 reviews
Southwest
8.1
Very good
4,411 reviews

Crew

8.7

Overall

8.1

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Food

7.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Delta
8.0
Very good
8,220 reviews
Southwest
8.1
Very good
4,411 reviews

Crew

8.7

Overall

8.1

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Food

7.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

JetBlue
7.4
Good
3,070 reviews
Southwest
8.1
Very good
4,411 reviews

Crew

8.7

Overall

8.1

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Food

7.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

United Airlines
7.4
Good
8,766 reviews
Southwest
8.1
Very good
4,411 reviews

Crew

8.7

Overall

8.1

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Food

7.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

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 United Airlines, with whom users have recently found tickets for as low as $89. However, be on the lookout for offers from Southwest and American Airlines, 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 $309). Flying from Illinois to District of Columbia in June is currently the most expensive (average of $389). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Illinois to District of Columbia

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Miami flights
Newark to Fort Lauderdale flights
Newark to Miami flights
LaGuardia to Fort Lauderdale flights
LaGuardia to Miami flights
John F Kennedy Intl to Fort Lauderdale flights
John F Kennedy Intl to Los Angeles flights
Newark to Orlando flights
Los Angeles to John F Kennedy Intl flights
John F Kennedy Intl to Las Vegas flights
Newark to Los Angeles flights
John F Kennedy Intl to Orlando flights
Los Angeles to Newark flights
John F Kennedy Intl to West Palm Beach flights
LaGuardia to Dallas/Fort Worth flights
John F Kennedy Intl to Dallas/Fort Worth flights
O'Hare Intl to Fort Lauderdale flights
O'Hare Intl to Las Vegas flights
John F Kennedy Intl to O'Hare Intl flights
Dallas/Fort Worth to LaGuardia flights
LaGuardia to Orlando flights
Dallas/Fort Worth to Seattle flights
San Francisco to John F Kennedy Intl flights
Dallas/Fort Worth to Las Vegas flights
Newark to Las Vegas flights
Newark to Tampa flights
Boston to Fort Lauderdale flights
Seattle to Los Angeles flights
Newark to Dallas/Fort Worth flights
Dallas/Fort Worth to Orlando flights
O'Hare Intl to John F Kennedy Intl flights
O'Hare Intl to Miami flights
Seattle to Sky Harbor Intl flights
O'Hare Intl to Sky Harbor Intl flights
Dallas/Fort Worth to John F Kennedy Intl flights
John F Kennedy Intl to San Francisco flights
LaGuardia to Tampa flights
John F Kennedy Intl to Sky Harbor Intl flights
John F Kennedy Intl to Tampa flights
Reagan-National to Miami flights
Minneapolis to Sky Harbor Intl flights
Dulles Intl to Orlando flights
Seattle to Las Vegas flights
Minneapolis to Las Vegas flights
Los Angeles to Seattle flights
John F Kennedy Intl to Atlanta flights
Dallas/Fort Worth to Newark flights
San Francisco to Newark flights
Dulles Intl to Dallas/Fort Worth flights
Boston to Miami flights

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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$54Average$150FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$109Average$369FlexibilityNo cancel feeOn-time71%
Spirit AirlinesCheapest$135Average$174FlexibilityNo cancel feeOn-time65%
SouthwestCheapest$138Average$288FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$162Average$346FlexibilityNo cancel feeOn-time69%
DeltaCheapest$175Average$323FlexibilityNo cancel feeOn-timeN/A
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.