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

$68 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 $69 and $81, respectively.

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

While some choose either Washington, D.C. Reagan-National - Chicago O'Hare Intl or Baltimore/Washington - 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 $561 for a flight from Washington, D.C. to Illinois. The cheapest flight overall is $88 while the most popular route, (Washington, D.C. Dulles Intl - Chicago O'Hare Intl) is currently priced at $193.

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 ANA (97%), Japan Airlines (89%) and Air New Zealand (85%).

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 88% 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 $262, or $460 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 May. 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.

$68+ Flights from Washington, D.C. to Illinois

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

Most accurate provider	Mytrip 3 stars
Most trusted provider	Mytrip 3 stars
Round-trip from	$126 (Frontier)
One-way from	$68 (FlightHub)
Popular in	May
Cheapest in	September
Average price	$273
Good round-trip deal	$167 or less
Good one-way deal	$91 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

Search Deals

Highest demand for flights based on searches. 6% potential increase in price ($19 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 0% potential price decrease ($2 potential savings vs. average RT price).

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Average for round-trip flights in April 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 abril 15, 2025.

jue. 5/81:38 pmBWI - MDW

Nonstop2h 07mFrontier

lun. 5/126:15 amMDW - BWI

Nonstop1h 58mFrontier

Deal found 4/15

$126

jue. 5/158:10 amBWI - ORD

Nonstop2h 14mSpirit Airlines

jue. 5/2910:33 amORD - BWI

Nonstop1h 46mSpirit Airlines

Deal found 4/14

$126

jue. 5/88:10 amBWI - ORD

Nonstop2h 14mMultiple Airlines

sáb. 5/103:16 pmORD - BWI

1 stop8h 28mMultiple Airlines

Deal found 4/14

$143

jue. 5/83:32 pmIAD - MDW

1 stop9h 07mFrontier

dom. 5/114:00 pmMDW - IAD

1 stop15h 24mFrontier

Deal found 4/15

$164

sáb. 7/510:35 amBWI - ORD

Nonstop2h 15mSouthwest

jue. 7/101:50 pmORD - BWI

Nonstop2h 00mSouthwest

Deal found 4/15

$169

sáb. 5/177:25 pmBWI - MDW

Nonstop2h 00mSouthwest

sáb. 5/245:45 amMDW - BWI

Nonstop1h 45mSouthwest

Deal found 4/15

$170

mar. 5/611:47 amIAD - ORD

1 stop5h 54mFrontier

vie. 5/99:00 amORD - IAD

1 stop24h 54mFrontier

Deal found 4/14

$177

sáb. 5/246:00 amDCA - MDW

Nonstop2h 00mSouthwest

sáb. 5/249:20 amMDW - DCA

1 stop7h 50mSouthwest

Deal found 4/15

$177

mié. 6/1811:19 amBWI - ORD

Nonstop2h 14mUnited Airlines

sáb. 6/216:35 pmORD - BWI

Nonstop2h 07mUnited Airlines

Deal found 4/13

$178

mié. 5/281:00 pmDCA - ORD

Nonstop2h 16mUnited Airlines

jue. 5/297:00 amORD - DCA

Nonstop1h 57mUnited Airlines

Deal found 4/15

$179

mié. 5/286:48 amIAD - ORD

Nonstop2h 14mUnited Airlines

jue. 5/299:31 pmORD - IAD

Nonstop1h 59mUnited Airlines

Deal found 4/15

$179

mié. 5/147:26 amBWI - ORD

Nonstop2h 17mAmerican Airlines

mié. 5/217:04 pmORD - BWI

Nonstop2h 01mAmerican Airlines

Deal found 4/14

$179

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 abril 15, 2025.

jue. 5/81:38 pmBWI - MDW

Nonstop2h 07mFrontier

lun. 5/126:15 amMDW - BWI

Nonstop1h 58mFrontier

Deal found 4/15

$126

jue. 5/158:10 amBWI - ORD

Nonstop2h 14mSpirit Airlines

jue. 5/2910:33 amORD - BWI

Nonstop1h 46mSpirit Airlines

Deal found 4/14

$126

jue. 5/88:10 amBWI - ORD

Nonstop2h 14mMultiple Airlines

sáb. 5/103:16 pmORD - BWI

1 stop8h 28mMultiple Airlines

Deal found 4/14

$143

sáb. 5/243:00 pmBWI - MDW

Nonstop2h 00mSouthwest

dom. 5/256:35 amMDW - BWI

Nonstop1h 50mSouthwest

Deal found 4/13

$161

mié. 6/1811:19 amBWI - ORD

Nonstop2h 14mUnited Airlines

sáb. 6/216:35 pmORD - BWI

Nonstop2h 07mUnited Airlines

Deal found 4/13

$178

mié. 5/147:26 amBWI - ORD

Nonstop2h 17mAmerican Airlines

mié. 5/217:04 pmORD - BWI

Nonstop2h 01mAmerican Airlines

Deal found 4/14

$184

sáb. 5/246:00 amDCA - ORD

1 stop4h 18mDelta

sáb. 5/241:45 pmORD - DCA

1 stop4h 14mDelta

Deal found 4/13

$197

mar. 5/612:45 pmDCA - ORD

1 stop6h 51mJetBlue

vie. 5/94:03 pmORD - DCA

1 stop5h 55mJetBlue

Deal found 4/14

$203

jue. 6/53:58 pmIAD - MDW

1 stop16h 17mAllegiant Air

dom. 6/811:45 amMDW - IAD

2 stops25h 38mAllegiant Air

Deal found 4/13

$306

jue. 5/83:32 pmIAD - MDW

1 stop9h 07mFrontier

dom. 5/114:00 pmMDW - IAD

1 stop15h 24mFrontier

Deal found 4/15

$164

sáb. 7/510:35 amBWI - ORD

Nonstop2h 15mSouthwest

jue. 7/101:50 pmORD - BWI

Nonstop2h 00mSouthwest

Deal found 4/14

$169

mié. 5/2810:30 amDCA - ORD

Nonstop2h 19mUnited Airlines

vie. 5/307:00 amORD - DCA

Nonstop1h 57mUnited Airlines

Deal found 4/15

$179

Last-minute flights from Washington, D.C. to Illinois
Discover last-minute flight deals from Washington, D.C. to Illinois. Data last updated abril 15, 2025 and is based on user searches.

mar. 4/2210:35 amBWI - ORD

Nonstop2h 15mSouthwest

mar. 4/224:00 pmORD - BWI

1 stop5h 35mSouthwest

Deal found 4/15

$270

mié. 4/236:00 amBWI - MDW

1 stop5h 05mFrontier

mié. 6/42:44 pmMDW - BWI

Nonstop1h 58mFrontier

Deal found 4/14

$170

mié. 4/231:57 pmBWI - STL

1 stop11h 07mMultiple Airlines

dom. 4/276:10 pmSTL - BWI

1 stop23h 40mMultiple Airlines

Deal found 4/13

$239

jue. 4/245:25 pmIAD - ORD

1 stop7h 14mFrontier

sáb. 5/310:22 amORD - IAD

1 stop5h 12mFrontier

Deal found 4/15

$188

jue. 4/248:20 amBWI - ORD

1 stop6h 44mFrontier

mar. 4/2911:57 amORD - BWI

1 stop10h 04mFrontier

Deal found 4/14

$188

jue. 4/249:08 amIAD - MDW

1 stop14h 18mFrontier

dom. 4/274:00 pmMDW - IAD

1 stop15h 18mFrontier

Deal found 4/14

$200

jue. 4/247:00 amDCA - MDW

1 stop13h 06mFrontier

lun. 4/288:01 pmMDW - DCA

1 stop19h 58mFrontier

Deal found 4/14

$200

vie. 4/257:40 pmBWI - ORD

1 stop13h 24mMultiple Airlines

sáb. 4/2610:22 amORD - BWI

1 stop5h 17mMultiple Airlines

Deal found 4/15

$174

vie. 4/255:58 pmBWI - STL

1 stop17h 03mFrontier

mar. 4/295:41 pmSTL - BWI

1 stop20h 00mFrontier

Deal found 4/14

$193

vie. 4/257:00 amDCA - ORD

1 stop17h 37mFrontier

lun. 4/285:24 pmORD - DCA

1 stop22h 35mFrontier

Deal found 4/14

$200

vie. 4/257:40 pmBWI - ORD

1 stop13h 24mSpirit Airlines

sáb. 4/2611:45 amORD - BWI

1 stop8h 10mSpirit Airlines

Deal found 4/15

$219

vie. 4/255:00 amBWI - ORD

1 stop4h 49mAmerican Airlines

mar. 5/277:04 pmORD - BWI

Nonstop2h 01mAmerican Airlines

Deal found 4/14

$267

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 abril 15, 2025.

jue. 6/58:10 amBWI - ORD

Nonstop2h 14mSpirit Airlines

Deal found 4/14

$68

lun. 6/304:32 pmBWI - MDW

Nonstop2h 02mFrontier

Deal found 4/14

$69

dom. 5/116:20 amBWI - MDW

Nonstop2h 05mSouthwest

Deal found 4/14

$81

dom. 5/116:59 amDCA - ORD

Nonstop2h 27mAmerican Airlines

Deal found 4/14

$83

mié. 6/46:41 amBWI - STL

1 stop27h 34mSpirit Airlines

Deal found 4/14

$84

lun. 5/123:32 pmIAD - ORD

1 stop8h 39mFrontier

Deal found 4/14

$86

jue. 5/83:32 pmIAD - MDW

1 stop9h 07mFrontier

Deal found 4/14

$86

lun. 5/127:00 amDCA - MDW

1 stop13h 08mFrontier

Deal found 4/14

$86

sáb. 4/265:35 pmIAD - STL

1 stop7h 29mFrontier

Deal found 4/14

$89

mié. 6/410:35 amBWI - ORD

Nonstop2h 15mSouthwest

Deal found 4/14

$89

dom. 5/258:40 amIAD - STL

Nonstop2h 16mUnited Airlines

Deal found 4/14

$90

sáb. 5/246:50 pmDCA - STL

Nonstop2h 15mSouthwest

Deal found 4/14

$90

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

jue. 5/8

1:38 pm-2:45 pm

Nonstop2h 07m

Chicago Midway

lun. 5/12

6:15 am-9:13 am

Nonstop1h 58m

$126

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

jue. 5/15

8:10 am-9:24 am

Nonstop2h 14m

Chicago O'Hare Intl

jue. 5/29

10:33 am-1:19 pm

Nonstop1h 46m

$126

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

jue. 5/8

8:10 am-9:24 am

Nonstop2h 14m

Chicago O'Hare Intl

sáb. 5/10

3:16 pm-12:44 am

1 stop8h 28m

$143

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

sáb. 5/24

3:00 pm-4:00 pm

Nonstop2h 00m

Chicago Midway

dom. 5/25

6:35 am-9:25 am

Nonstop1h 50m

$161

Washington, D.C.Chicago

IAD - MDW

IADMDW

Washington, D.C. Dulles Intl

jue. 5/8

3:32 pm-11:39 pm

1 stop9h 07m

Chicago Midway

dom. 5/11

4:00 pm-8:24 am

1 stop15h 24m

$164

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

sáb. 7/5

10:35 am-11:50 am

Nonstop2h 15m

Chicago O'Hare Intl

jue. 7/10

1:50 pm-4:50 pm

Nonstop2h 00m

$169

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

mar. 5/6

11:47 am-4:41 pm

1 stop5h 54m

Chicago O'Hare Intl

vie. 5/9

9:00 am-10:54 am

1 stop24h 54m

$177

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

sáb. 5/24

6:00 am-7:00 am

Nonstop2h 00m

Chicago Midway

sáb. 5/24

9:20 am-6:10 pm

1 stop7h 50m

$177

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

mié. 6/18

11:19 am-12:33 pm

Nonstop2h 14m

Chicago O'Hare Intl

sáb. 6/21

6:35 pm-9:42 pm

Nonstop2h 07m

$178

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

mié. 5/28

1:00 pm-2:16 pm

Nonstop2h 16m

Chicago O'Hare Intl

jue. 5/29

7:00 am-9:57 am

Nonstop1h 57m

$179

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/14

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 $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 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 Tuesday (76 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (25 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

9,871 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Alaska Airlines

8.0

Very good

9,871 reviews

Alaska Airlines

8.0

Very good

9,871 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Southwest

8.0

Very good

4,279 reviews

Alaska Airlines

8.0

Very good

9,871 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Delta

8.0

Very good

7,918 reviews

Alaska Airlines

8.0

Very good

9,871 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

United Airlines

7.4

Good

8,658 reviews

Alaska Airlines

8.0

Very good

9,871 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

JetBlue

7.3

Good

2,927 reviews

Alaska Airlines

8.0

Very good

9,871 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Related info for your journey

What are the cheapest airlines to fly from Washington, D.C. to Illinois one-way?
$68 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 $69 and $81, respectively.
What are the most popular routes from Washington, D.C. to Illinois?
While some choose either Washington, D.C. Reagan-National - Chicago O'Hare Intl or Baltimore/Washington - 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 ANA (97%), Japan Airlines (89%) and Air New Zealand (85%).
What are the cheapest flights from Washington, D.C. to Illinois?
On average you can expect to pay $561 for a flight from Washington, D.C. to Illinois. The cheapest flight overall is $88 while the most popular route, (Washington, D.C. Dulles Intl - Chicago O'Hare Intl) is currently priced at $193.
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 $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

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
Spirit Airlines	Cheapest$46	Average$171	FlexibilityNo cancel fee	On-time65%
Frontier	Cheapest$58	Average$178	FlexibilityNo cancel fee	On-time62%
Delta	Cheapest$99	Average$334	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$145	Average$410	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$154	Average$382	FlexibilityNo cancel fee	On-time69%
Southwest	Cheapest$165	Average$299	FlexibilityNo cancel fee	On-time63%

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$68+ 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 6/5. 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 abril 15, 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 abril 15, 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 abril 15, 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 abril 15, 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 abril 15, 2025.