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

The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $76. However, be on the lookout for offers from Spirit Airlines and Southwest, as they are both options that can get you from Illinois to Washington, D.C. for a low price.

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

Most travelers choose Chicago O'Hare Intl - Washington, D.C. Dulles Intl, Chicago O'Hare Intl - Washington, D.C. Reagan-National or Chicago O'Hare Intl - Baltimore/Washington when deciding on the best route from Illinois to Washington, D.C..

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

On average you can expect to pay $1,158 for a flight from Illinois to Washington, D.C.. The cheapest flight overall is $108 while the most popular route, (Chicago O'Hare Intl - Washington, D.C. Dulles Intl) is currently priced at $161.

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

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Illinois to Washington, D.C. on time: Air China (89%), Ethiopian Air (86%), Austrian Airlines (84%).

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

When booking a flight from Illinois to Washington, D.C., you may want to consider flying on American Airlines, Delta or Frontier as they are the most popular for this route.

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

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 33 days in advance, which can save you up to 34% on flights from Illinois to Washington, D.C. compared to booking the week you need them. Waiting 33 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $223. For sooner than that we have options available in the next 3 days from $399.

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

Due to multiple factors, expect to potentially pay more when booking in June. For low rates, September can be a great choice for travel to Washington, D.C.. Flights to Washington, D.C. from Illinois in September are about $231 on average during September, but can be found for as low as $62.

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

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

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

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

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

Yes. Cheapflights offers flight deals from Illinois to Washington, D.C. by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$75+ Flights from Illinois to Washington, D.C.

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

Most accurate provider	FlightHub 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$172 (FlightHub)
One-way from	$76 (Trip.com)
Popular in	June
Cheapest in	September
Average price	$254
Good round-trip deal	$188 or less
Good one-way deal	$84 or less

Provider with most accurate pricing for Chicago (CHI)-Washington, D.C. (WAS) flight deals.

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Provider most trusted by Cheapflights users for Chicago (CHI)-Washington, D.C. (WAS) flights.

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From Illinois to Washington, D.C. (WAS)

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

Search Deals

Highest demand for flights based on searches. 3% potential increase in price ($8 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 0% potential price decrease ($3 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2025

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

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

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

Cheapest flights from Illinois to Washington, D.C.
Explore the most affordable flight options available from Illinois to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 17, 2025.

Tue 5/69:34 amMDW - BWI

1 stop9h 22mFrontier

Thu 5/81:38 pmBWI - MDW

Nonstop2h 07mFrontier

Deal found 4/17

$172

Sat 5/1712:41 pmORD - BWI

1 stop9h 00mSpirit Airlines

Mon 5/197:57 pmBWI - ORD

1 stop13h 53mSpirit Airlines

Deal found 4/17

$172

Fri 5/305:45 amMDW - BWI

Nonstop1h 45mSouthwest

Sun 6/16:20 amBWI - MDW

Nonstop2h 05mSouthwest

Deal found 4/17

$177

Fri 5/301:50 pmORD - BWI

Nonstop1h 55mSouthwest

Mon 6/210:35 amBWI - ORD

Nonstop2h 15mSouthwest

Deal found 4/17

$177

Wed 5/1411:10 amORD - BWI

1 stop7h 46mFrontier

Sat 5/176:45 amBWI - ORD

1 stop7h 56mFrontier

Deal found 4/17

$178

Thu 5/1510:33 amORD - BWI

Nonstop1h 46mMultiple Airlines

Tue 7/87:20 amBWI - ORD

1 stop10h 18mMultiple Airlines

Deal found 4/17

$179

Wed 5/286:00 amORD - DCA

Nonstop1h 54mAmerican Airlines

Fri 5/306:00 amDCA - ORD

Nonstop2h 20mAmerican Airlines

Deal found 4/17

$179

Wed 5/285:25 pmMDW - DCA

Nonstop1h 55mSouthwest

Fri 5/306:55 amDCA - MDW

Nonstop2h 00mSouthwest

Deal found 4/17

$179

Sat 5/316:10 amMDW - IAD

1 stop8h 54mFrontier

Tue 6/35:15 amIAD - MDW

1 stop11h 24mFrontier

Deal found 4/17

$179

Thu 5/16:00 amORD - IAD

1 stop7h 23mFrontier

Sun 5/43:32 pmIAD - ORD

1 stop8h 39mFrontier

Deal found 4/17

$180

Thu 5/18:03 pmMDW - DCA

1 stop24h 56mFrontier

Wed 5/76:00 pmDCA - MDW

1 stop26h 08mFrontier

Deal found 4/17

$181

Sat 5/243:13 pmORD - DCA

Nonstop2h 02mUnited Airlines

Sun 5/256:00 amDCA - ORD

1 stop5h 44mUnited Airlines

Deal found 4/17

$186

Best flights from Illinois to Washington, D.C.
Discover carefully curated flight deals from Illinois to Washington, D.C. that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 17, 2025.

Mon 5/57:47 pmORD - BWI

1 stop12h 35mSpirit Airlines

Mon 5/127:57 pmBWI - ORD

1 stop13h 53mSpirit Airlines

Deal found 4/17

$172

Thu 5/19:51 amMDW - BWI

Nonstop1h 57mFrontier

Fri 5/910:03 amBWI - MDW

Nonstop2h 06mFrontier

Deal found 4/17

$173

Sun 5/45:45 amORD - BWI

1 stop13h 14mMultiple Airlines

Sun 5/188:10 amBWI - ORD

Nonstop2h 14mMultiple Airlines

Deal found 4/17

$175

Fri 5/237:50 pmMDW - BWI

Nonstop1h 50mSouthwest

Mon 5/268:05 amBWI - MDW

Nonstop2h 00mSouthwest

Deal found 4/16

$177

Wed 5/286:00 amORD - DCA

Nonstop1h 54mAmerican Airlines

Fri 5/306:00 amDCA - ORD

Nonstop2h 20mAmerican Airlines

Deal found 4/17

$179

Sat 5/243:13 pmORD - DCA

Nonstop2h 02mUnited Airlines

Sun 5/256:00 amDCA - ORD

1 stop5h 44mUnited Airlines

Deal found 4/17

$186

Wed 6/46:00 amMDW - BWI

1 stop5h 47mDelta

Wed 6/44:47 pmBWI - MDW

1 stop5h 40mDelta

Deal found 4/16

$191

Thu 9/48:40 amORD - DCA

1 stop6h 33mJetBlue

Tue 9/910:00 amDCA - ORD

1 stop8h 35mJetBlue

Deal found 4/17

$203

Fri 6/68:36 pmMDW - IAD

2 stops23h 17mAllegiant Air

Sun 6/83:58 pmIAD - MDW

1 stop16h 17mAllegiant Air

Deal found 4/16

$246

Fri 5/301:50 pmORD - BWI

Nonstop1h 55mSouthwest

Mon 6/210:35 amBWI - ORD

Nonstop2h 15mSouthwest

Deal found 4/17

$177

Sat 5/310:22 amORD - BWI

1 stop5h 17mFrontier

Tue 5/66:07 amBWI - ORD

1 stop11h 34mFrontier

Deal found 4/17

$178

Sat 5/107:01 amORD - BWI

Nonstop1h 58mAmerican Airlines

Wed 5/147:26 amBWI - ORD

Nonstop2h 17mAmerican Airlines

Deal found 4/17

$180

Last-minute flights from Illinois to Washington, D.C.
Discover last-minute flight deals from Illinois to Washington, D.C.. Data last updated April 17, 2025 and is based on user searches.

Tue 4/225:41 pmSTL - BWI

1 stop20h 11mFrontier

Tue 4/2910:45 amBWI - STL

1 stop14h 19mFrontier

Deal found 4/17

$260

Wed 4/239:28 amORD - BWI

1 stop10h 17mFrontier

Thu 4/248:20 amBWI - ORD

1 stop6h 44mFrontier

Deal found 4/17

$188

Thu 4/248:11 amORD - IAD

1 stop5h 51mFrontier

Sat 4/265:35 pmIAD - ORD

1 stop7h 01mFrontier

Deal found 4/17

$186

Thu 4/248:01 pmMDW - DCA

1 stop15h 08mFrontier

Sun 4/277:00 amDCA - MDW

1 stop13h 06mFrontier

Deal found 4/16

$221

Thu 4/245:41 pmSTL - IAD

1 stop21h 54mFrontier

Sun 4/275:25 pmIAD - STL

1 stop7h 39mFrontier

Deal found 4/16

$228

Fri 4/255:36 pmORD - BWI

1 stop5h 23mMultiple Airlines

Thu 5/88:10 amBWI - ORD

Nonstop2h 14mMultiple Airlines

Deal found 4/17

$172

Fri 4/256:15 amMDW - BWI

Nonstop1h 50mFrontier

Fri 5/910:03 amBWI - MDW

Nonstop2h 06mFrontier

Deal found 4/17

$184

Fri 4/256:58 pmSTL - DCA

1 stop26h 01mFrontier

Tue 4/291:00 pmDCA - STL

1 stop22h 01mFrontier

Deal found 4/17

$218

Fri 4/255:23 pmORD - DCA

1 stop17h 46mFrontier

Sun 4/277:00 amDCA - ORD

1 stop17h 38mFrontier

Deal found 4/17

$221

Sat 4/2611:45 amORD - BWI

1 stop5h 47mSpirit Airlines

Wed 4/307:40 pmBWI - ORD

1 stop13h 24mSpirit Airlines

Deal found 4/17

$274

Sat 4/266:45 pmORD - BWI

Nonstop2h 04mAmerican Airlines

Sun 5/47:30 amBWI - ORD

Nonstop2h 10mAmerican Airlines

Deal found 4/17

$307

Sun 4/274:00 pmMDW - IAD

1 stop15h 18mFrontier

Thu 5/19:14 amIAD - MDW

1 stop14h 26mFrontier

Deal found 4/17

$210

One-way flights from Illinois to Washington, D.C.
Search for one-way flight options from Illinois to Washington, D.C.. Find affordable one-way fares based on user searches. Data last updated April 17, 2025.

Mon 5/126:15 amMDW - BWI

Nonstop1h 58mFrontier

Deal found 4/16

$76

Thu 6/1210:19 amORD - BWI

Nonstop1h 54mSpirit Airlines

Deal found 4/17

$80

Sat 5/247:55 pmMDW - BWI

Nonstop1h 50mSouthwest

Deal found 4/16

$81

Tue 7/11:50 pmORD - BWI

Nonstop2h 00mSouthwest

Deal found 4/17

$81

Thu 5/81:19 pmMDW - IAD

1 stop26h 17mFrontier

Deal found 4/16

$87

Sun 5/114:15 pmORD - IAD

1 stop23h 21mFrontier

Deal found 4/16

$87

Fri 6/65:20 pmORD - IAD

1 stop20h 12mMultiple Airlines

Deal found 4/17

$88

Wed 5/286:35 pmORD - BWI

Nonstop2h 07mUnited Airlines

Deal found 4/17

$89

Sat 5/318:17 pmORD - DCA

Nonstop2h 01mAmerican Airlines

Deal found 4/17

$90

Sat 5/316:00 amMDW - DCA

Nonstop1h 50mSouthwest

Deal found 4/16

$90

Wed 5/2111:10 amORD - BWI

1 stop7h 46mFrontier

Deal found 4/17

$91

Sat 5/1710:10 amSTL - BWI

1 stop7h 42mSpirit Airlines

Deal found 4/17

$91

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

ChicagoBaltimore

ORD - BWI

ORDBWI

Chicago O'Hare Intl

Mon 5/5

7:47 pm-9:22 am

1 stop12h 35m

Baltimore/Washington

Mon 5/12

7:57 pm-8:50 am

1 stop13h 53m

$172

ChicagoBaltimore

MDW - BWI

MDWBWI

Chicago Midway

Thu 5/1

9:51 am-12:48 pm

Nonstop1h 57m

Baltimore/Washington

Fri 5/9

10:03 am-11:09 am

Nonstop2h 06m

$173

ChicagoBaltimore

ORD - BWI

ORDBWI

Chicago O'Hare Intl

Sun 5/4

5:45 am-7:59 pm

1 stop13h 14m

Baltimore/Washington

Sun 5/18

8:10 am-9:24 am

Nonstop2h 14m

$175

ChicagoBaltimore

MDW - BWI

MDWBWI

Chicago Midway

Fri 5/23

7:50 pm-10:40 pm

Nonstop1h 50m

Baltimore/Washington

Mon 5/26

8:05 am-9:05 am

Nonstop2h 00m

$177

ChicagoBaltimore

ORD - BWI

ORDBWI

Chicago O'Hare Intl

Fri 5/30

1:50 pm-4:45 pm

Nonstop1h 55m

Baltimore/Washington

Mon 6/2

10:35 am-11:50 am

Nonstop2h 15m

$177

ChicagoBaltimore

ORD - BWI

ORDBWI

Chicago O'Hare Intl

Sat 5/3

10:22 am-4:39 pm

1 stop5h 17m

Baltimore/Washington

Tue 5/6

6:07 am-4:41 pm

1 stop11h 34m

$178

ChicagoWashington, D.C.

ORD - IAD

ORDIAD

Chicago O'Hare Intl

Sat 5/24

8:04 am-4:04 pm

1 stop7h 00m

Washington, D.C. Dulles Intl

Wed 5/28

5:15 am-2:22 pm

1 stop10h 07m

$178

ChicagoWashington, D.C.

ORD - DCA

ORDDCA

Chicago O'Hare Intl

Wed 5/28

6:00 am-8:54 am

Nonstop1h 54m

Washington, D.C. Reagan-National

Fri 5/30

6:00 am-7:20 am

Nonstop2h 20m

$179

ChicagoWashington, D.C.

MDW - DCA

MDWDCA

Chicago Midway

Wed 5/28

5:25 pm-8:20 pm

Nonstop1h 55m

Washington, D.C. Reagan-National

Fri 5/30

6:55 am-7:55 am

Nonstop2h 00m

$179

ChicagoWashington, D.C.

MDW - IAD

MDWIAD

Chicago Midway

Sat 5/31

6:10 am-4:04 pm

1 stop8h 54m

Washington, D.C. Dulles Intl

Tue 6/3

5:15 am-3:39 pm

1 stop11h 24m

$179

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

Showing 1-10 of 60 results

...

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

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

Cheapflights Insights

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

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

Currently, August is the cheapest month in which you can book a flight from Illinois to Washington, D.C. (average of $309). Flying from Illinois to Washington, D.C. in June is currently the most expensive (average of $383). 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 WAS?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Washington, D.C. as you normally would.

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

The most flights from USIL to WAS are scheduled on a Wednesday (75 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (28 on average).

Rainfall in Washington, D.C. by month

In terms of precipitation, rainfall in Washington, D.C. 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 Washington, D.C. when rainfall is around 2.6 in.

Temperature in Washington, D.C. by month

If weather is an important factor for your trip to Washington, D.C., 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 Washington, D.C.

See what other customers who have flown with Alaska Airlines, Southwest and Delta from Illinois to Washington, D.C. have to say. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

9,882 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

9,882 reviews

Alaska Airlines

8.0

Very good

9,882 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

4,280 reviews

Alaska Airlines

8.0

Very good

9,882 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

7,917 reviews

Alaska Airlines

8.0

Very good

9,882 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

8,667 reviews

Alaska Airlines

8.0

Very good

9,882 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

2,926 reviews

Alaska Airlines

8.0

Very good

9,882 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 Illinois to Washington, D.C. one-way?
The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $76. However, be on the lookout for offers from Spirit Airlines and Southwest, as they are both options that can get you from Illinois to Washington, D.C. for a low price.
What are the most popular routes from Illinois to Washington, D.C.?
Most travelers choose Chicago O'Hare Intl - Washington, D.C. Dulles Intl, Chicago O'Hare Intl - Washington, D.C. Reagan-National or Chicago O'Hare Intl - Baltimore/Washington when deciding on the best route from Illinois to Washington, D.C..
What are the most reliable airlines from Illinois to Washington, D.C.?
Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Illinois to Washington, D.C. on time: Air China (89%), Ethiopian Air (86%), Austrian Airlines (84%).
What are the cheapest flights from Illinois to Washington, D.C.?
On average you can expect to pay $1,158 for a flight from Illinois to Washington, D.C.. The cheapest flight overall is $108 while the most popular route, (Chicago O'Hare Intl - Washington, D.C. Dulles Intl) is currently priced at $161.
Can I find deals for flights from Illinois to Washington, D.C. that include hotel bookings?
Yes. In addition to deals on Illinois to Washington, D.C. flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Illinois to Washington, D.C.?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Washington, D.C..
Can I find deals for business class flights from Illinois to Washington, D.C.?
Yes. Cheapflights offers flight deals from Illinois to Washington, D.C. 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 Washington, D.C.?
Currently, August is the cheapest month in which you can book a flight from Illinois to Washington, D.C. (average of $309). Flying from Illinois to Washington, D.C. in June is currently the most expensive (average of $383). 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

Arlington

Alexandria

Fairfax

Tysons

Springfield

Woodbridge

Rockville

Fredericksburg

Gaithersburg

Silver Spring

Linthicum Heights

Falls Church

Laurel

Easton

Herndon

Bowie

Gettysburg

National Harbor

Oxon Hill

Reston

Browse thousands of different options on Cheapflights for your next trip

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

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$54	Average$164	FlexibilityNo cancel fee	On-time62%
Spirit Airlines	Cheapest$101	Average$174	FlexibilityNo cancel fee	On-time65%
American Airlines	Cheapest$109	Average$367	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$140	Average$289	FlexibilityNo cancel fee	On-time63%
Delta	Cheapest$166	Average$320	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$174	Average$347	FlexibilityNo cancel fee	On-time69%

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$75+ Cheap flights from Illinois to Washington, D.C. (WAS)

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 5/19. Fares are subject to change and may not be available on all flights or dates of travel.

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

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

Keep the following information in mind while searching for Illinois to Washington, D.C. flight deals. Data was last updated April 17, 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 Illinois to Washington, D.C.

Cheapest flights from Illinois to Washington, D.C.Explore the most affordable flight options available from Illinois to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 17, 2025.

Explore the most affordable flight options available from Illinois to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 17, 2025.

Cheapflights Fare Finder

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

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

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

Cheapflights Insights

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

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

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

Find hourly flight availability from Illinois to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 17, 2025.

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

Rainfall in Washington, D.C. by month

Plan your trip to Washington, D.C. by taking into account the average rainfall totals by month.

Temperature in Washington, D.C. by month

Plan your trip to Washington, D.C. by taking into account the average temperature totals by month.

Reviews of airlines servicing Washington, D.C.

See what other customers who have flown with Alaska Airlines, Southwest and Delta from Illinois to Washington, D.C. have to say. In addition to providing an overall rating, 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 Illinois to Washington, D.C.. 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 Washington, D.C. one-way?

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

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

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

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

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

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

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

Traveling to a place near Illinois?

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Alternative routes for Illinois to Washington, D.C.

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

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

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Cheapest flights from Illinois to Washington, D.C.
Explore the most affordable flight options available from Illinois to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 17, 2025.