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Washington, D.C.

$64+ 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 8/17. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — WAS
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$108
(CheapOair)

One-way from

$64
(Kiwi.com)

Popular in

January

Cheapest in

September

Average price

$234

Good round-trip deal

$155 or less

Good one-way deal

$80 or less
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. 3% potential increase in price ($9 potential increase over avg. RT price).
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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 June 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 June 12, 2025.

This CheapOair deal was found by Cheapflights users on 6/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/92:48 pmMDW - BWI
Nonstop1h 58mFrontier
Mon 7/144:32 pmBWI - MDW
Nonstop2h 04mFrontier
Deal found 6/10$108
This Mytrip deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/314:37 pmORD - BWI
Nonstop1h 54mSpirit Airlines
Sun 8/38:26 pmBWI - ORD
Nonstop2h 23mSpirit Airlines
Deal found 6/10$110
This Cheapflightsfares deal was found by Cheapflights users on 6/12. 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.
Fri 8/291:15 pmORD - BWI
Nonstop2h 06mFrontier
Sun 8/315:06 pmBWI - ORD
Nonstop2h 22mFrontier
Deal found 6/12$115
This FlightHub deal was found by Cheapflights users on 6/11. 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.
Thu 7/104:37 pmORD - BWI
Nonstop1h 54mMultiple Airlines
Mon 7/1411:36 amBWI - ORD
Nonstop2h 22mMultiple Airlines
Deal found 6/11$126
This Southwest deal was found by Cheapflights users on 6/10. 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 8/611:45 amMDW - BWI
Nonstop1h 50mSouthwest
Tue 8/121:25 pmBWI - MDW
Nonstop1h 55mSouthwest
Deal found 6/10$139
This United Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/67:00 amORD - BWI
Nonstop2h 03mUnited Airlines
Wed 8/1310:59 amBWI - ORD
Nonstop2h 15mUnited Airlines
Deal found 6/10$139
This Mytrip deal was found by Cheapflights users on 6/11. 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.
Sun 7/66:36 pmSTL - BWI
1 stop11h 28mSpirit Airlines
Sat 7/2610:11 pmBWI - STL
1 stop12h 41mSpirit Airlines
Deal found 6/11$140
This United Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/148:00 amORD - DCA
Nonstop1h 56mUnited Airlines
Mon 8/1810:30 amDCA - ORD
Nonstop2h 19mUnited Airlines
Deal found 6/10$157
This Southwest deal was found by Cheapflights users on 6/11. 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 8/63:25 pmMDW - DCA
Nonstop1h 50mSouthwest
Wed 8/1311:55 amDCA - MDW
Nonstop1h 55mSouthwest
Deal found 6/11$157
This United Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/149:31 pmORD - IAD
Nonstop1h 59mUnited Airlines
Mon 8/1810:19 pmIAD - ORD
Nonstop2h 11mUnited Airlines
Deal found 6/11$157
This Southwest deal was found by Cheapflights users on 6/10. 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 7/21:50 pmORD - BWI
Nonstop2h 00mSouthwest
Fri 7/411:55 amBWI - ORD
Nonstop2h 10mSouthwest
Deal found 6/10$159
This American Airlines deal was found by Cheapflights users on 6/12. 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.
Tue 7/158:02 amORD - DCA
1 stop3h 57mAmerican Airlines
Tue 7/152:35 pmDCA - ORD
Nonstop2h 17mAmerican Airlines
Deal found 6/12$167

Cheapflights Fare Finder

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 June 12, 2025.
Use the filters below to find and compare flights from Illinois to Washington, D.C. that are best for you.

Fly from

Illinois

Fly to

Washington, D.C.

Route

Depart

Return

Price

ChicagoBaltimore

MDW - BWI

MDWBWI

Chicago Midway

Wed 7/9

2:48 pm-5:46 pm

Nonstop1h 58m

Baltimore/Washington

Mon 7/14

4:32 pm-5:36 pm

Nonstop2h 04m

$108

ChicagoBaltimore

ORD - BWI

ORDBWI

Chicago O'Hare Intl

Thu 7/31

4:37 pm-7:31 pm

Nonstop1h 54m

Baltimore/Washington

Sun 8/3

8:26 pm-9:49 pm

Nonstop2h 23m

$110

ChicagoBaltimore

ORD - BWI

ORDBWI

Chicago O'Hare Intl

Fri 8/29

1:15 pm-4:21 pm

Nonstop2h 06m

Baltimore/Washington

Sun 8/31

5:06 pm-6:28 pm

Nonstop2h 22m

$115

ChicagoBaltimore

ORD - BWI

ORDBWI

Chicago O'Hare Intl

Thu 7/10

4:37 pm-7:31 pm

Nonstop1h 54m

Baltimore/Washington

Mon 7/14

11:36 am-12:58 pm

Nonstop2h 22m

$126

ChicagoBaltimore

MDW - BWI

MDWBWI

Chicago Midway

Wed 8/6

11:45 am-2:35 pm

Nonstop1h 50m

Baltimore/Washington

Tue 8/12

1:25 pm-2:20 pm

Nonstop1h 55m

$139

ChicagoBaltimore

ORD - BWI

ORDBWI

Chicago O'Hare Intl

Wed 8/6

7:00 am-10:03 am

Nonstop2h 03m

Baltimore/Washington

Wed 8/13

10:59 am-12:14 pm

Nonstop2h 15m

$139

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Sun 7/6

6:36 pm-7:04 am

1 stop11h 28m

Baltimore/Washington

Sat 7/26

10:11 pm-9:52 am

1 stop12h 41m

$140

ChicagoWashington, D.C.

ORD - DCA

ORDDCA

Chicago O'Hare Intl

Thu 8/14

8:00 am-10:56 am

Nonstop1h 56m

Washington, D.C. Reagan-National

Mon 8/18

10:30 am-11:49 am

Nonstop2h 19m

$157

ChicagoWashington, D.C.

MDW - DCA

MDWDCA

Chicago Midway

Wed 8/6

3:25 pm-6:15 pm

Nonstop1h 50m

Washington, D.C. Reagan-National

Wed 8/13

11:55 am-12:50 pm

Nonstop1h 55m

$157

ChicagoWashington, D.C.

ORD - IAD

ORDIAD

Chicago O'Hare Intl

Thu 8/14

9:31 pm-12:30 am

Nonstop1h 59m

Washington, D.C. Dulles Intl

Mon 8/18

10:19 pm-11:30 pm

Nonstop2h 11m

$157

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

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.

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 $241). Flying from Illinois to Washington, D.C. in March is currently the most expensive (average of $290). 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 June 12, 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 June 12, 2025.

The most flights from USIL to WAS are scheduled on a Thursday (81 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (42 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 June 12, 2025.
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
10,000 reviews

Overall

8.0

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
JetBlue
7.3
Good
2,925 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 Spirit Airlines, with whom users have recently found tickets for as low as $64. However, be on the lookout for offers from Frontier 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: Republic Airways (100%), United Airlines (87%), Air New Zealand (81%).

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

    On average you can expect to pay $275 for a flight from Illinois to Washington, D.C.. The cheapest flight overall is $46 while the most popular route, (Chicago O'Hare Intl - Washington, D.C. Dulles Intl) is currently priced at $157.

  • 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 $241). Flying from Illinois to Washington, D.C. in March is currently the most expensive (average of $290). 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
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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$38Average$174FlexibilityNo cancel feeOn-time65%
FrontierCheapest$54Average$170FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$123Average$377FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$142Average$288FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$154Average$351FlexibilityNo cancel feeOn-time69%
DeltaCheapest$166Average$345FlexibilityNo cancel feeOn-timeN/A

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