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$80+ 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 5/21. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — ORD
Apr 5 — Apr 121
Sat 4/5
Sat 4/12
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 March 31, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$174
(Trip.com)

One-way from

$80
(Frontier)

Popular in

March

Cheapest in

September

Average price

$290

Good round-trip deal

$244 or less

Good one-way deal

$153 or less
Provider with most accurate pricing for Washington, D.C. (WAS)-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Chicago (CHI) flights.
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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. 0% potential increase in price ($1 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 31, 2025.

This Trip.com deal was found by Cheapflights users on 3/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/85:26 pmIAD - ORD
1 stop7h 06mFrontier
Sun 5/114:15 pmORD - IAD
1 stop23h 21mFrontier
Deal found 3/30$176
This Frontier deal was found by Cheapflights users on 3/30. 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.
Wed 4/1612:53 pmIAD - MDW
1 stop9h 40mFrontier
Fri 4/187:05 amMDW - IAD
1 stop6h 30mFrontier
Deal found 3/30$178
This Frontier deal was found by Cheapflights users on 3/30. 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.
Tue 4/151:03 pmDCA - MDW
1 stop12h 18mFrontier
Wed 4/166:45 amMDW - DCA
1 stop9h 14mFrontier
Deal found 3/30$178
This American Airlines deal was found by Cheapflights users on 3/31. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/286:00 amDCA - ORD
Nonstop2h 20mAmerican Airlines
Sat 5/318:17 pmORD - DCA
Nonstop2h 01mAmerican Airlines
Deal found 3/31$179
This United Airlines deal was found by Cheapflights users on 3/30. 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.
Sat 5/2410:18 pmIAD - ORD
Nonstop2h 12mUnited Airlines
Sun 5/258:52 amORD - IAD
Nonstop2h 03mUnited Airlines
Deal found 3/30$179
This Southwest deal was found by Cheapflights users on 3/30. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/246:45 pmDCA - MDW
Nonstop2h 00mSouthwest
Sun 5/257:15 amMDW - DCA
Nonstop1h 50mSouthwest
Deal found 3/30$179
This JetBlue deal was found by Cheapflights users on 3/31. 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.
Wed 4/301:45 pmDCA - ORD
1 stop5h 50mJetBlue
Wed 5/74:03 pmORD - DCA
1 stop5h 55mJetBlue
Deal found 3/31$183
This Delta deal was found by Cheapflights users on 3/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/287:33 pmDCA - ORD
1 stop5h 25mDelta
Sat 5/315:15 pmORD - DCA
1 stop3h 55mDelta
Deal found 3/30$199
This Delta deal was found by Cheapflights users on 3/31. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/286:00 amIAD - ORD
1 stop5h 03mDelta
Thu 5/293:57 pmORD - IAD
1 stop7h 31mDelta
Deal found 3/31$199
This Delta deal was found by Cheapflights users on 3/31. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/286:00 amIAD - MDW
1 stop3h 40mDelta
Sat 5/311:08 pmMDW - IAD
1 stop3h 29mDelta
Deal found 3/31$199
This CheapOair deal was found by Cheapflights users on 3/30. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/257:00 amDCA - ORD
1 stop17h 37mFrontier
Sun 4/275:24 pmORD - DCA
1 stop17h 45mFrontier
Deal found 3/30$200
This United Airlines deal was found by Cheapflights users on 3/31. 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.
Sat 5/247:11 pmDCA - ORD
Nonstop2h 16mUnited Airlines
Mon 5/266:00 amORD - DCA
Nonstop1h 57mUnited Airlines
Deal found 3/31$204

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 March 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 - ORD

IADORD

Washington, D.C. Dulles Intl

Thu 5/8

5:26 pm-11:32 pm

1 stop7h 06m

Chicago O'Hare Intl

Sun 5/11

4:15 pm-4:36 pm

1 stop23h 21m

$176

Washington, D.C.Chicago

IAD - MDW

IADMDW

Washington, D.C. Dulles Intl

Wed 4/16

12:53 pm-9:33 pm

1 stop9h 40m

Chicago Midway

Fri 4/18

7:05 am-2:35 pm

1 stop6h 30m

$178

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

Tue 4/15

1:03 pm-12:21 am

1 stop12h 18m

Chicago Midway

Wed 4/16

6:45 am-4:59 pm

1 stop9h 14m

$178

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Wed 5/28

6:00 am-7:20 am

Nonstop2h 20m

Chicago O'Hare Intl

Sat 5/31

8:17 pm-11:18 pm

Nonstop2h 01m

$179

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Sat 5/24

10:18 pm-11:30 pm

Nonstop2h 12m

Chicago O'Hare Intl

Sun 5/25

8:52 am-11:55 am

Nonstop2h 03m

$179

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

Sat 5/24

6:45 pm-7:45 pm

Nonstop2h 00m

Chicago Midway

Sun 5/25

7:15 am-10:05 am

Nonstop1h 50m

$179

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Wed 4/30

1:45 pm-6:35 pm

1 stop5h 50m

Chicago O'Hare Intl

Wed 5/7

4:03 pm-10:58 pm

1 stop5h 55m

$183

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Wed 5/28

7:33 pm-11:58 pm

1 stop5h 25m

Chicago O'Hare Intl

Sat 5/31

5:15 pm-10:10 pm

1 stop3h 55m

$199

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Wed 5/28

9:40 am-12:41 pm

1 stop4h 01m

Chicago O'Hare Intl

Sat 5/31

5:57 pm-11:35 pm

1 stop4h 38m

$199

Washington, D.C.Chicago

IAD - MDW

IADMDW

Washington, D.C. Dulles Intl

Wed 5/28

6:00 am-8:40 am

1 stop3h 40m

Chicago Midway

Sat 5/31

1:08 pm-5:37 pm

1 stop3h 29m

$199

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/31

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 $323). 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 March 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 March 31, 2025.

The most flights from USDC to USIL are scheduled on a Monday (21 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (4 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 March 31, 2025.
See what other customers who have flown with Alaska Airlines, Southwest and Delta from District of Columbia to Illinois have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,818 reviews

Food

7.1

Overall

8.0

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,818 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Food

7.1

Overall

8.0

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Southwest
8.0
Very good
4,275 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Food

7.1

Overall

8.0

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,899 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Food

7.1

Overall

8.0

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,614 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Food

7.1

Overall

8.0

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
JetBlue
7.3
Good
2,924 reviews
Alaska Airlines
8.0
Very good
9,818 reviews

Food

7.1

Overall

8.0

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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?

    $80 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on American Airlines and United Airlines, with prices starting from $90 and $90, 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 $323). 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 March 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$58Average$176FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$59Average$181FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$138Average$412FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$151Average$382FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$161Average$300FlexibilityNo cancel feeOn-time63%
DeltaCheapest$176Average$338FlexibilityNo cancel feeOn-timeN/A
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