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$79+ 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 5/26. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — ORD
Feb 28 — Mar 71
Fri 2/28
Fri 3/7
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 February 23, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$158
(Mytrip)

One-way from

$79
(Frontier)

Popular in

March

Cheapest in

September

Average price

$244

Good round-trip deal

$229 or less

Good one-way deal

$176 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 ($2 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 February 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 February 23, 2025.

This Frontier deal was found by Cheapflights users on 2/22. 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 5/295:23 pmIAD - ORD
1 stop7h 15mFrontier
Sat 5/317:59 pmORD - IAD
1 stop9h 33mFrontier
Deal found 2/22$158
This Mytrip deal was found by Cheapflights users on 2/21. 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.
Thu 4/311:45 amIAD - MDW
1 stop8h 50mFrontier
Sat 4/512:58 pmMDW - IAD
1 stop20h 57mFrontier
Deal found 2/21$158
This Frontier deal was found by Cheapflights users on 2/22. 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.
Fri 4/46:00 pmDCA - ORD
1 stop7h 37mFrontier
Mon 4/76:40 amORD - DCA
1 stop14h 19mFrontier
Deal found 2/22$160
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.
Sun 3/166:00 pmDCA - MDW
1 stop7h 17mFrontier
Wed 3/196:40 amMDW - DCA
1 stop9h 19mFrontier
Deal found 2/20$160
This American Airlines deal was found by Cheapflights users on 2/22. 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.
Thu 3/136:00 amDCA - ORD
Nonstop2h 12mAmerican Airlines
Mon 3/178:19 pmORD - DCA
Nonstop1h 56mAmerican Airlines
Deal found 2/22$177
This United Airlines deal was found by Cheapflights users on 2/22. 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 3/2610:20 pmIAD - ORD
Nonstop2h 09mUnited Airlines
Wed 4/168:45 amORD - IAD
Nonstop1h 59mUnited Airlines
Deal found 2/22$177
This Southwest deal was found by Cheapflights users on 2/21. 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 3/276:05 amDCA - MDW
Nonstop2h 05mSouthwest
Mon 3/318:55 pmMDW - DCA
Nonstop1h 45mSouthwest
Deal found 2/21$177
This JetBlue deal was found by Cheapflights users on 2/21. 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 3/269:29 amDCA - ORD
1 stop7h 56mJetBlue
Mon 3/311:24 pmORD - DCA
1 stop6h 35mJetBlue
Deal found 2/21$183
This United Airlines deal was found by Cheapflights users on 2/21. 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 3/116:00 amDCA - ORD
1 stop5h 46mUnited Airlines
Tue 3/117:40 pmORD - DCA
Nonstop2h 02mUnited Airlines
Deal found 2/21$187
This Trip.com deal was found by Cheapflights users on 2/21. 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 5/112:45 pmIAD - ORD
1 stop7h 24mMultiple Airlines
Sat 5/310:22 amORD - IAD
1 stop5h 12mMultiple Airlines
Deal found 2/21$193
This KAYAK deal was found by Cheapflights users on 2/21. 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 4/16:00 amDCA - ORD
1 stop4h 18mDelta
Thu 4/32:30 pmORD - DCA
1 stop5h 04mDelta
Deal found 2/21$194
This KAYAK deal was found by Cheapflights users on 2/21. 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 4/110:05 amIAD - ORD
1 stop7h 15mDelta
Thu 4/37:35 amORD - IAD
1 stop4h 47mDelta
Deal found 2/21$194

Find flights from District of Columbia to Illinois within your budget

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 February 23, 2025.

Fly from

District of Columbia

Fly to

Illinois

Route

Depart

Return

Price

Washington, D.C.Chicago

IAD - MDW

IADMDW

Washington, D.C. Dulles Intl

Thu 4/3

11:45 am-7:35 pm

1 stop8h 50m

Chicago Midway

Sat 4/5

12:58 pm-10:55 am

1 stop20h 57m

$158

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Fri 4/4

6:00 pm-12:37 am

1 stop7h 37m

Chicago O'Hare Intl

Mon 4/7

6:40 am-9:59 pm

1 stop14h 19m

$160

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Mon 3/24

4:31 pm-10:57 am

1 stop19h 26m

Chicago O'Hare Intl

Sat 3/29

1:25 pm-9:25 pm

1 stop7h 00m

$160

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

Sun 3/16

6:00 pm-12:17 am

1 stop7h 17m

Chicago Midway

Wed 3/19

6:40 am-4:59 pm

1 stop9h 19m

$160

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Thu 3/13

6:00 am-7:12 am

Nonstop2h 12m

Chicago O'Hare Intl

Mon 3/17

8:19 pm-11:15 pm

Nonstop1h 56m

$177

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Wed 3/26

10:20 pm-11:29 pm

Nonstop2h 09m

Chicago O'Hare Intl

Wed 4/16

8:45 am-11:44 am

Nonstop1h 59m

$177

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

Thu 3/27

6:05 am-7:10 am

Nonstop2h 05m

Chicago Midway

Mon 3/31

8:55 pm-11:40 pm

Nonstop1h 45m

$177

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Wed 3/26

9:29 am-4:25 pm

1 stop7h 56m

Chicago O'Hare Intl

Mon 3/31

1:24 pm-8:59 pm

1 stop6h 35m

$183

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Tue 3/11

6:00 am-10:46 am

1 stop5h 46m

Chicago O'Hare Intl

Tue 3/11

7:40 pm-10:42 pm

Nonstop2h 02m

$187

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Thu 5/1

12:45 pm-7:09 pm

1 stop7h 24m

Chicago O'Hare Intl

Sat 5/3

10:22 am-4:34 pm

1 stop5h 12m

$193

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/21

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.

Travel insights for flights from District of Columbia to Illinois

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

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 February 23, 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 February 23, 2025.

The most flights from USDC to USIL are scheduled on a Saturday (21 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (15 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 February 23, 2025.
See what other customers who have flown with Southwest, Alaska Airlines 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.
Southwest
8.1
Very good
4,395 reviews

Entertainment

7.6

Comfort

8.1

Overall

8.1

Crew

8.7

Food

7.1

Boarding

8.2

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
4,395 reviews
Southwest
8.1
Very good
4,395 reviews

Entertainment

7.6

Comfort

8.1

Overall

8.1

Crew

8.7

Food

7.1

Boarding

8.2

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
9,706 reviews
Southwest
8.1
Very good
4,395 reviews

Entertainment

7.6

Comfort

8.1

Overall

8.1

Crew

8.7

Food

7.1

Boarding

8.2

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
8,203 reviews
Southwest
8.1
Very good
4,395 reviews

Entertainment

7.6

Comfort

8.1

Overall

8.1

Crew

8.7

Food

7.1

Boarding

8.2

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
3,068 reviews
Southwest
8.1
Very good
4,395 reviews

Entertainment

7.6

Comfort

8.1

Overall

8.1

Crew

8.7

Food

7.1

Boarding

8.2

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
8,754 reviews
Southwest
8.1
Very good
4,395 reviews

Entertainment

7.6

Comfort

8.1

Overall

8.1

Crew

8.7

Food

7.1

Boarding

8.2

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 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?

    $79 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on United Airlines and Southwest, with prices starting from $89 and $89, 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 February 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$58Average$173FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$101Average$197FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$133Average$412FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$149Average$386FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$158Average$292FlexibilityNo cancel feeOn-time63%
DeltaCheapest$175Average$294FlexibilityNo cancel feeOn-timeN/A
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