What are the cheapest airlines to fly from Washington, D.C. to Illinois one-way?

$63 is the cheapest one-way deal found within the past few days, from Spirit Airlines. You may also be able to find cheap deals on Frontier and Southwest, with prices starting from $76 and $79, respectively.

What are the most popular routes from Washington, D.C. to Illinois?

While some choose either Baltimore/Washington - Chicago O'Hare Intl or Washington, D.C. Reagan-National - Chicago O'Hare Intl, Washington, D.C. Dulles Intl - Chicago O'Hare Intl is the most popular route from Washington, D.C. to Illinois.

What are the cheapest flights from Washington, D.C. to Illinois?

On average you can expect to pay $1,800 for a flight from Washington, D.C. to Illinois. The cheapest flight overall is $114 while the most popular route, (Washington, D.C. Dulles Intl - Chicago O'Hare Intl) is currently priced at $177.

What are the most reliable airlines from Washington, D.C. to Illinois?

The top 3 most reliable airlines when flying from Washington, D.C. to Illinois are Sun Country Air (100%), Emirates (100%) and Austrian Airlines (88%).

What are the most popular airlines that fly from Washington, D.C. to Illinois?

Before booking your flight from Washington, D.C. to Illinois check out the most popular airlines for this route: American Airlines, Delta or Frontier.

How far in advance should I book a flight from Washington, D.C. to Illinois?

Travelers have found it’s best to book a flight 51 days in advance to save up to 90% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 51 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Washington, D.C. to Illinois 1-2 weeks in advance for as low as $274, or $485 for flights within the next 24 hours.

What is the cheapest month to fly from Washington, D.C. to Illinois?

Flights from Washington, D.C. to Illinois lean towards being more expensive in March. Prices are generally better when you fly from Washington, D.C. to Illinois in September, with the cheapest ticket starting at $63.

Can I find deals for flights from Washington, D.C. to Illinois that include hotel bookings?

Yes. In addition to deals on Washington, D.C. to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Washington, D.C. to Illinois?

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

Can I find deals for business class flights from Washington, D.C. to Illinois?

Yes. Cheapflights offers flight deals from Washington, D.C. 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.

$63+ Save on Flights from Washington, D.C. to Illinois

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Cheap flight deals from Washington, D.C. to Illinois

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$116 (Frontier)
One-way from	$63 (Mytrip)
Popular in	March
Cheapest in	September
Average price	$289
Good round-trip deal	$163 or less
Good one-way deal	$64 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 Washington, D.C. (WAS) to Illinois

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One-way flight from Washington, D.C. (WAS) to Illinois

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High demand for flights, 0% potential price rise

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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 March 2025

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Price to beat on a round-trip flight from Washington, D.C. (WAS) to Illinois.

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Price to beat on a one-way flight from Washington, D.C. (WAS) to Illinois.

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Find flight deals from Washington, D.C. to Illinois

Cheapest flights from Washington, D.C. to Illinois
Explore the most affordable flight options available from Washington, D.C. to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 25, 2025.

Wed 4/94:45 pmBWI - MDW

Nonstop2h 06mFrontier

Wed 4/161:05 pmMDW - BWI

Nonstop1h 50mFrontier

Deal found 3/24

$116

Thu 5/86:20 amBWI - ORD

1 stop27h 35mSpirit Airlines

Mon 5/1211:00 amORD - BWI

1 stop23h 04mSpirit Airlines

Deal found 3/23

$124

Tue 4/226:15 amBWI - ORD

Nonstop2h 17mUnited Airlines

Tue 4/2911:20 amORD - BWI

Nonstop1h 58mUnited Airlines

Deal found 3/23

$157

Tue 5/66:40 amBWI - MDW

Nonstop2h 05mSouthwest

Tue 5/67:35 pmMDW - BWI

Nonstop1h 50mSouthwest

Deal found 3/24

$159

Tue 5/610:35 amBWI - ORD

Nonstop2h 15mSouthwest

Thu 5/81:50 pmORD - BWI

Nonstop1h 55mSouthwest

Deal found 3/24

$168

Mon 4/148:00 pmDCA - ORD

Nonstop2h 17mUnited Airlines

Thu 4/1712:45 pmORD - DCA

Nonstop1h 56mUnited Airlines

Deal found 3/24

$177

Mon 4/1410:20 pmIAD - ORD

Nonstop2h 09mUnited Airlines

Thu 4/171:28 pmORD - IAD

Nonstop2h 02mUnited Airlines

Deal found 3/24

$177

Wed 4/237:10 amBWI - STL

Nonstop2h 15mSouthwest

Wed 4/306:15 amSTL - BWI

Nonstop2h 00mSouthwest

Deal found 3/24

$177

Tue 4/227:30 amDCA - MDW

Nonstop2h 00mSouthwest

Tue 4/293:20 pmMDW - DCA

Nonstop1h 50mSouthwest

Deal found 3/23

$177

Fri 5/306:00 amDCA - ORD

Nonstop2h 20mAmerican Airlines

Wed 6/47:11 pmORD - DCA

Nonstop2h 04mAmerican Airlines

Deal found 3/23

$178

Wed 4/3010:15 amDCA - ORD

1 stop9h 20mJetBlue

Tue 5/68:45 amORD - DCA

1 stop7h 10mJetBlue

Deal found 3/24

$183

Wed 4/235:47 pmDCA - ORD

1 stop3h 58mDelta

Wed 4/306:15 pmORD - DCA

1 stop3h 55mDelta

Deal found 3/24

$197

Best flights from Washington, D.C. to Illinois
Discover carefully curated flight deals from Washington, D.C. to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 25, 2025.

Wed 4/94:45 pmBWI - MDW

Nonstop2h 06mFrontier

Wed 4/161:05 pmMDW - BWI

Nonstop1h 50mFrontier

Deal found 3/24

$116

Mon 5/55:20 amBWI - ORD

2 stops26h 43mSpirit Airlines

Thu 5/811:00 amORD - BWI

1 stop12h 18mSpirit Airlines

Deal found 3/24

$132

Wed 4/236:15 amBWI - ORD

Nonstop2h 17mUnited Airlines

Wed 4/306:35 pmORD - BWI

Nonstop2h 07mUnited Airlines

Deal found 3/24

$157

Tue 5/66:40 amBWI - MDW

Nonstop2h 05mSouthwest

Tue 5/67:35 pmMDW - BWI

Nonstop1h 50mSouthwest

Deal found 3/24

$159

Fri 5/306:00 amDCA - ORD

Nonstop2h 20mAmerican Airlines

Wed 6/47:11 pmORD - DCA

Nonstop2h 04mAmerican Airlines

Deal found 3/23

$178

Wed 4/3010:15 amDCA - ORD

1 stop9h 20mJetBlue

Wed 5/74:03 pmORD - DCA

1 stop5h 55mJetBlue

Deal found 3/24

$183

Wed 4/236:00 amDCA - ORD

1 stop4h 21mDelta

Wed 4/235:05 pmORD - DCA

1 stop5h 05mDelta

Deal found 3/23

$197

Thu 4/109:56 pmBWI - ORD

1 stop11h 53mMultiple Airlines

Tue 4/155:36 amORD - BWI

1 stop12h 14mMultiple Airlines

Deal found 3/24

$201

Mon 5/2612:26 pmBWI - ORD

1 stop8h 43mSun Country Air

Thu 5/298:05 pmORD - BWI

1 stop14h 25mSun Country Air

Deal found 3/23

$231

Tue 5/610:35 amBWI - ORD

Nonstop2h 15mSouthwest

Wed 5/141:50 pmORD - BWI

Nonstop1h 55mSouthwest

Deal found 3/25

$159

Sun 6/83:58 pmIAD - MDW

1 stop16h 17mAllegiant Air

Fri 6/132:53 pmMDW - IAD

2 stops29h 00mAllegiant Air

Deal found 3/23

$349

Thu 5/16:25 amDCA - ORD

Nonstop2h 15mUnited Airlines

Thu 5/13:22 pmORD - DCA

Nonstop2h 01mUnited Airlines

Deal found 3/24

$177

Last-minute flights from Washington, D.C. to Illinois
Discover last-minute flight deals from Washington, D.C. to Illinois. Data last updated March 25, 2025 and is based on user searches.

Tue 4/18:30 amIAD - STL

1 stop16h 16mFrontier

Wed 4/94:57 pmSTL - IAD

1 stop16h 58mFrontier

Deal found 3/24

$242

Tue 4/14:50 pmBWI - MDW

Nonstop2h 10mSouthwest

Tue 4/87:35 pmMDW - BWI

Nonstop1h 50mSouthwest

Deal found 3/23

$263

Wed 4/24:45 pmBWI - MDW

Nonstop2h 06mFrontier

Wed 4/91:05 pmMDW - BWI

Nonstop1h 50mFrontier

Deal found 3/23

$116

Wed 4/26:05 amBWI - ORD

1 stop27h 39mSpirit Airlines

Mon 4/78:33 pmORD - BWI

1 stop26h 39mSpirit Airlines

Deal found 3/23

$184

Wed 4/24:35 pmIAD - MDW

1 stop5h 58mFrontier

Thu 4/310:19 amMDW - IAD

1 stop5h 45mFrontier

Deal found 3/24

$218

Wed 4/21:03 pmDCA - MDW

1 stop12h 18mFrontier

Wed 4/96:45 amMDW - DCA

1 stop9h 14mFrontier

Deal found 3/24

$218

Wed 4/25:18 pmBWI - ORD

1 stop8h 24mMultiple Airlines

Thu 4/36:25 pmORD - BWI

1 stop4h 47mMultiple Airlines

Deal found 3/23

$234

Wed 4/21:03 pmDCA - ORD

1 stop12h 39mFrontier

Wed 4/96:40 amORD - DCA

1 stop14h 19mFrontier

Deal found 3/24

$240

Wed 4/24:06 pmBWI - STL

1 stop8h 40mFrontier

Thu 4/34:57 pmSTL - BWI

1 stop13h 28mFrontier

Deal found 3/25

$240

Wed 4/25:18 pmBWI - ORD

1 stop8h 24mFrontier

Sat 4/57:20 amORD - BWI

1 stop7h 48mFrontier

Deal found 3/24

$240

Thu 4/311:45 amIAD - ORD

1 stop9h 10mFrontier

Fri 4/49:54 amORD - IAD

1 stop6h 11mFrontier

Deal found 3/24

$218

Thu 4/37:00 amDCA - STL

1 stop27h 06mFrontier

Sat 4/56:51 pmSTL - DCA

1 stop16h 13mFrontier

Deal found 3/24

$240

One-way flights from Washington, D.C. to Illinois
Search for one-way flight options from Washington, D.C. to Illinois. Find affordable one-way fares based on user searches. Data last updated March 25, 2025.

Wed 5/1412:20 pmBWI - ORD

1 stop21h 35mSpirit Airlines

Deal found 3/24

$63

Tue 4/2910:27 amBWI - STL

1 stop7h 48mSpirit Airlines

Deal found 3/24

$75

Wed 6/116:27 pmBWI - MDW

Nonstop2h 04mFrontier

Deal found 3/23

$76

Wed 4/236:40 amBWI - MDW

Nonstop2h 05mSouthwest

Deal found 3/24

$79

Wed 4/236:15 amBWI - ORD

Nonstop2h 17mUnited Airlines

Deal found 3/24

$79

Mon 4/217:30 amBWI - ORD

Nonstop2h 10mAmerican Airlines

Deal found 3/23

$88

Thu 4/1710:30 amDCA - ORD

Nonstop2h 14mUnited Airlines

Deal found 3/24

$89

Tue 4/298:35 amIAD - STL

Nonstop2h 23mUnited Airlines

Deal found 3/24

$89

Tue 4/2910:20 pmIAD - ORD

Nonstop2h 09mUnited Airlines

Deal found 3/24

$89

Mon 5/59:30 pmBWI - STL

Nonstop2h 15mSouthwest

Deal found 3/24

$89

Tue 4/158:22 amDCA - STL

Nonstop2h 30mAmerican Airlines

Deal found 3/24

$89

Wed 6/119:00 amDCA - MDW

Nonstop2h 15mSouthwest

Deal found 3/24

$89

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington, D.C. to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

Wed 4/9

4:45 pm-5:51 pm

Nonstop2h 06m

Chicago Midway

Wed 4/16

1:05 pm-3:55 pm

Nonstop1h 50m

$116

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

Thu 5/8

6:20 am-8:55 am

1 stop27h 35m

Chicago O'Hare Intl

Mon 5/12

11:00 am-11:04 am

1 stop23h 04m

$124

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

Tue 4/22

6:15 am-7:32 am

Nonstop2h 17m

Chicago O'Hare Intl

Tue 4/29

11:20 am-2:18 pm

Nonstop1h 58m

$157

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

Tue 5/6

6:40 am-7:45 am

Nonstop2h 05m

Chicago Midway

Tue 5/6

7:35 pm-10:25 pm

Nonstop1h 50m

$159

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

Tue 5/6

10:35 am-11:50 am

Nonstop2h 15m

Chicago O'Hare Intl

Thu 5/8

1:50 pm-4:45 pm

Nonstop1h 55m

$168

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Mon 4/14

8:00 pm-9:17 pm

Nonstop2h 17m

Chicago O'Hare Intl

Thu 4/17

12:45 pm-3:41 pm

Nonstop1h 56m

$177

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Mon 4/14

10:20 pm-11:29 pm

Nonstop2h 09m

Chicago O'Hare Intl

Thu 4/17

1:28 pm-4:30 pm

Nonstop2h 02m

$177

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Wed 4/23

7:10 am-8:25 am

Nonstop2h 15m

Lambert-St Louis

Wed 4/30

6:15 am-9:15 am

Nonstop2h 00m

$177

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

Tue 4/22

7:30 am-8:30 am

Nonstop2h 00m

Chicago Midway

Tue 4/29

3:20 pm-6:10 pm

Nonstop1h 50m

$177

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Fri 5/30

6:00 am-7:20 am

Nonstop2h 20m

Chicago O'Hare Intl

Wed 6/4

7:11 pm-10:15 pm

Nonstop2h 04m

$178

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/24

Showing 1-10 of 60 results

...

Best time to book a flight from Washington, D.C. to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Washington, D.C. 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 Washington, D.C. to Illinois

What is the cheapest month to book a flight from Washington, D.C. to Illinois?

Currently, August is the cheapest month in which you can book a flight from Washington, D.C. to Illinois (average of $245). Flying from Washington, D.C. 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 WAS to IL?

When flying from Washington, D.C. to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Washington, D.C. to Illinois

The most flights from WAS to USIL are scheduled on a Monday (69 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (52 on average).

Rainfall in Illinois 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

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

Peruse reviews from past customers who have flown with Alaska Airlines, Southwest and Delta from Washington, D.C. to Illinois to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

9,785 reviews

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

9,785 reviews

Alaska Airlines

8.0

Very good

9,785 reviews

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

4,272 reviews

Alaska Airlines

8.0

Very good

9,785 reviews

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

7,890 reviews

Alaska Airlines

8.0

Very good

9,785 reviews

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

8,605 reviews

Alaska Airlines

8.0

Very good

9,785 reviews

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

9,785 reviews

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

What are the cheapest airlines to fly from Washington, D.C. to Illinois one-way?
$63 is the cheapest one-way deal found within the past few days, from Spirit Airlines. You may also be able to find cheap deals on Frontier and Southwest, with prices starting from $76 and $79, respectively.
What are the most popular routes from Washington, D.C. to Illinois?
While some choose either Baltimore/Washington - Chicago O'Hare Intl or Washington, D.C. Reagan-National - Chicago O'Hare Intl, Washington, D.C. Dulles Intl - Chicago O'Hare Intl is the most popular route from Washington, D.C. to Illinois.
What are the most reliable airlines from Washington, D.C. to Illinois?
The top 3 most reliable airlines when flying from Washington, D.C. to Illinois are Sun Country Air (100%), Emirates (100%) and Austrian Airlines (88%).
What are the cheapest flights from Washington, D.C. to Illinois?
On average you can expect to pay $1,800 for a flight from Washington, D.C. to Illinois. The cheapest flight overall is $114 while the most popular route, (Washington, D.C. Dulles Intl - Chicago O'Hare Intl) is currently priced at $177.
Can I find deals for flights from Washington, D.C. to Illinois that include hotel bookings?
Yes. In addition to deals on Washington, D.C. to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Washington, D.C. to Illinois?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington, D.C. to Illinois.
Can I find deals for business class flights from Washington, D.C. to Illinois?
Yes. Cheapflights offers flight deals from Washington, D.C. 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 Washington, D.C. to Illinois?
Currently, August is the cheapest month in which you can book a flight from Washington, D.C. to Illinois (average of $245). Flying from Washington, D.C. 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

Browse thousands of different options on Cheapflights for your next trip

Top 6 airlines flying from Washington, D.C. to Illinois

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$58	Average$176	FlexibilityNo cancel fee	On-time62%
Spirit Airlines	Cheapest$101	Average$193	FlexibilityNo cancel fee	On-time65%
American Airlines	Cheapest$137	Average$411	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$151	Average$379	FlexibilityNo cancel fee	On-time69%
Southwest	Cheapest$160	Average$300	FlexibilityNo cancel fee	On-time63%
Delta	Cheapest$176	Average$332	FlexibilityNo cancel fee	On-timeN/A

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$63+ Cheap flights from Washington, D.C. (WAS) 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 5/14. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Washington, D.C. to Illinois with Cheapflights

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Cheap flight deals from Washington, D.C. to Illinois

Keep the following information in mind while searching for Washington, D.C. to Illinois flight deals. Data was last updated March 25, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Washington, D.C. to Illinois

Cheapest flights from Washington, D.C. to IllinoisExplore the most affordable flight options available from Washington, D.C. to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 25, 2025.

Explore the most affordable flight options available from Washington, D.C. to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 25, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington, D.C. to Illinois that are best for you.

Best time to book a flight from Washington, D.C. to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Washington, D.C. with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. to Illinois

What is the cheapest month to book a flight from Washington, D.C. to Illinois?

What is the cheapest time of day to fly from WAS to IL?

Find hourly flight availability from Washington, D.C. 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 25, 2025.

Weekly flight availability from Washington, D.C. to Illinois

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

Reviews of airlines servicing Illinois

Peruse reviews from past customers who have flown with Alaska Airlines, Southwest and Delta from Washington, D.C. to Illinois to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. 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 Washington, D.C. to Illinois one-way?

What are the most popular routes from Washington, D.C. to Illinois?

What are the most reliable airlines from Washington, D.C. to Illinois?

What are the cheapest flights from Washington, D.C. to Illinois?

Can I find deals for flights from Washington, D.C. to Illinois that include hotel bookings?

How can I find direct flights from Washington, D.C. to Illinois?

Can I find deals for business class flights from Washington, D.C. to Illinois?

What is the cheapest month to book a flight from Washington, D.C. to Illinois?

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 Washington, D.C. to Illinois

See prices for flight routes from nearby airports that may be better suited for you.

Top 6 airlines flying from Washington, D.C. to Illinois

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Cheapest flights from Washington, D.C. to Illinois
Explore the most affordable flight options available from Washington, D.C. to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 25, 2025.