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Washington, D.C.

$61+ 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 3/28. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — WAS
Feb 27 — Mar 61
Thu 2/27
Thu 3/6
1 adult, Economy
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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 February 22, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$113
(Cheapflightsfares)

One-way from

$61
(Mytrip)

Popular in

March

Cheapest in

August

Average price

$267

Good round-trip deal

$148 or less

Good one-way deal

$69 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)
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Highest demand for flights based on searches. 8% potential increase in price ($20 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($5 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 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 February 22, 2025.

This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/110:26 amMDW - BWI
Nonstop1h 55mFrontier
Wed 3/55:11 pmBWI - MDW
Nonstop2h 12mFrontier
Deal found 2/20$113
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.
Sat 4/128:20 amORD - BWI
1 stop9h 15mFrontier
Sat 4/196:05 amBWI - ORD
1 stop8h 53mFrontier
Deal found 2/20$113
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/308:45 amORD - BWI
1 stop7h 48mSpirit Airlines
Wed 5/75:47 pmBWI - ORD
1 stop5h 41mSpirit Airlines
Deal found 2/21$117
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/16:25 pmORD - BWI
1 stop4h 47mMultiple Airlines
Wed 4/95:18 pmBWI - ORD
1 stop8h 19mMultiple Airlines
Deal found 2/22$123
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/105:24 pmSTL - BWI
1 stop12h 57mFrontier
Tue 3/114:22 pmBWI - STL
1 stop8h 27mFrontier
Deal found 2/22$138
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/165:47 pmSTL - BWI
1 stop23h 49mMultiple Airlines
Tue 5/209:00 amBWI - STL
1 stop10h 32mMultiple Airlines
Deal found 2/20$144
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/156:11 pmSTL - BWI
1 stop22h 17mSpirit Airlines
Wed 4/236:33 pmBWI - STL
1 stop23h 43mSpirit Airlines
Deal found 2/21$157
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.
Wed 4/237:35 pmMDW - BWI
Nonstop1h 50mSouthwest
Sat 4/266:55 amBWI - MDW
Nonstop2h 05mSouthwest
Deal found 2/21$159
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/56:45 pmORD - BWI
Nonstop2h 04mAmerican Airlines
Wed 4/97:30 amBWI - ORD
Nonstop2h 10mAmerican Airlines
Deal found 2/21$159
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.
Wed 3/2611:25 amORD - BWI
Nonstop1h 50mSouthwest
Tue 4/18:40 pmBWI - ORD
Nonstop2h 20mSouthwest
Deal found 2/21$168
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.
Mon 3/108:11 amORD - DCA
Nonstop1h 49mAmerican Airlines
Wed 3/126:00 amDCA - ORD
Nonstop2h 12mAmerican Airlines
Deal found 2/22$177
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/126:45 amMDW - DCA
1 stop14h 14mFrontier
Tue 4/156:00 pmDCA - MDW
1 stop7h 21mFrontier
Deal found 2/21$178

Find flights from Illinois to Washington, D.C. within your budget

Customize your flight search to find flights from Illinois to Washington, D.C. 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 22, 2025.

Fly from

Illinois

Fly to

Washington, D.C.

Route

Depart

Return

Price

ChicagoBaltimore

MDW - BWI

MDWBWI

Chicago Midway

Sat 3/1

10:26 am-1:21 pm

Nonstop1h 55m

Baltimore/Washington

Wed 3/5

5:11 pm-6:23 pm

Nonstop2h 12m

$113

ChicagoBaltimore

ORD - BWI

ORDBWI

Chicago O'Hare Intl

Sat 4/12

8:20 am-6:35 pm

1 stop9h 15m

Baltimore/Washington

Sat 4/19

6:05 am-1:58 pm

1 stop8h 53m

$113

ChicagoBaltimore

ORD - BWI

ORDBWI

Chicago O'Hare Intl

Wed 4/30

8:45 am-5:33 pm

1 stop7h 48m

Baltimore/Washington

Wed 5/7

5:47 pm-10:28 pm

1 stop5h 41m

$117

ChicagoBaltimore

ORD - BWI

ORDBWI

Chicago O'Hare Intl

Tue 4/1

6:25 pm-12:12 am

1 stop4h 47m

Baltimore/Washington

Wed 4/9

5:18 pm-12:37 am

1 stop8h 19m

$123

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Mon 3/10

5:24 pm-7:21 am

1 stop12h 57m

Baltimore/Washington

Tue 3/11

4:22 pm-11:49 pm

1 stop8h 27m

$138

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Fri 5/16

5:47 pm-6:36 pm

1 stop23h 49m

Baltimore/Washington

Tue 5/20

9:00 am-6:32 pm

1 stop10h 32m

$144

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Tue 4/15

6:11 pm-5:28 pm

1 stop22h 17m

Baltimore/Washington

Wed 4/23

6:33 pm-5:16 pm

1 stop23h 43m

$157

ChicagoBaltimore

MDW - BWI

MDWBWI

Chicago Midway

Wed 4/23

7:35 pm-10:25 pm

Nonstop1h 50m

Baltimore/Washington

Sat 4/26

6:55 am-8:00 am

Nonstop2h 05m

$159

ChicagoBaltimore

ORD - BWI

ORDBWI

Chicago O'Hare Intl

Sat 4/5

6:45 pm-9:49 pm

Nonstop2h 04m

Baltimore/Washington

Wed 4/9

7:30 am-8:40 am

Nonstop2h 10m

$159

ChicagoBaltimore

ORD - BWI

ORDBWI

Chicago O'Hare Intl

Wed 3/26

11:25 am-2:15 pm

Nonstop1h 50m

Baltimore/Washington

Tue 4/1

8:40 pm-10:00 pm

Nonstop2h 20m

$168

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/22

Showing 1-10 of 60 results
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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.

Travel insights for flights from Illinois to Washington, D.C.

Get recent, data-driven insights about flights from Illinois to Washington, D.C. including ideal travel times, pricing trends, and more.

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 $389). 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?

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 February 22, 2025.

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.

Explore weekly flight availability from Illinois to Washington, D.C.. 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 22, 2025.

The most flights from USIL to WAS are scheduled on a Friday (61 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (46 on average).

Rainfall in Washington, D.C. by month

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

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

Get insights into the airlines that provide service to Washington, D.C.. 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 Washington, D.C.. Reviews last updated February 22, 2025.
See what other customers who have flown with Southwest, Alaska Airlines 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.
Southwest
8.1
Very good
4,395 reviews

Overall

8.1

Boarding

8.2

Comfort

8.1

Food

7.1

Crew

8.7

Entertainment

7.6

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

Overall

8.1

Boarding

8.2

Comfort

8.1

Food

7.1

Crew

8.7

Entertainment

7.6

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
9,700 reviews
Southwest
8.1
Very good
4,395 reviews

Overall

8.1

Boarding

8.2

Comfort

8.1

Food

7.1

Crew

8.7

Entertainment

7.6

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

Overall

8.1

Boarding

8.2

Comfort

8.1

Food

7.1

Crew

8.7

Entertainment

7.6

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

Overall

8.1

Boarding

8.2

Comfort

8.1

Food

7.1

Crew

8.7

Entertainment

7.6

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

Overall

8.1

Boarding

8.2

Comfort

8.1

Food

7.1

Crew

8.7

Entertainment

7.6

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 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?

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $61. 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 (94%), Avianca (92%), Austrian Airlines (89%).

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

    On average you can expect to pay $843 for a flight from Illinois to Washington, D.C.. The cheapest flight overall is $114 while the most popular route, (Chicago O'Hare Intl - Washington, D.C. Dulles Intl) is currently priced at $123.

  • 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 $389). 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

Traveling to a place near Illinois?

Book flights to Illinois if you plan to visit one of these locations
Arlington
Alexandria
Fairfax
Springfield
Rockville
Tysons
Gaithersburg
Silver Spring
Fredericksburg
Linthicum Heights
Laurel
Falls Church
Woodbridge
Easton
Herndon
Bowie
Reston
National Harbor
Oxon Hill
Gettysburg

Browse thousands of different options on Cheapflights for your next trip

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

Discover the top 6 airlines that operate flights from Illinois to Washington, D.C.. 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 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$54Average$150FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$109Average$369FlexibilityNo cancel feeOn-time71%
Spirit AirlinesCheapest$135Average$174FlexibilityNo cancel feeOn-time65%
SouthwestCheapest$138Average$288FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$162Average$346FlexibilityNo cancel feeOn-time69%
DeltaCheapest$175Average$323FlexibilityNo cancel feeOn-timeN/A
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