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Washington, D.C.

$53+ Cheap flights from Illinois to Washington, D.C. (WAS)

ORD — WAS
Oct 20 — Oct 271
Tue 10/20
Tue 10/27
1 adult, Economy
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Cheap flight deals from Illinois to Washington, D.C.

Cheapest flights from Illinois to Washington, D.C.

Thu 9/246:20 am -
Nonstop2h 05m
Sat 9/265:03 pm -
Nonstop2h 24m
Deal found 9/15$121
Mon 10/196:35 pm -
1 stop4h 59m
Wed 10/2110:22 am -
1 stop8h 18m
Deal found 9/16$122
Thu 10/296:00 am -
Nonstop1h 57m
Mon 11/29:53 am -
Nonstop2h 30m
Deal found 9/16$130
Thu 10/226:00 am -
Nonstop2h 03m
Mon 11/29:53 am -
Nonstop2h 30m
Deal found 9/15$131
Tue 11/242:52 pm -
Nonstop2h 10m
Fri 11/272:42 pm -
Nonstop2h 28m
Deal found 9/16$133
Thu 11/56:00 am -
Nonstop1h 57m
Mon 11/99:53 am -
Nonstop2h 30m
Deal found 9/16$134
Mon 10/266:00 am -
Nonstop2h 03m
Thu 10/299:53 am -
Nonstop2h 30m
Deal found 9/15$135
Wed 11/187:15 am -
1 stop7h 59m
Sat 11/212:42 pm -
Nonstop2h 28m
Deal found 9/16$136
Mon 10/266:35 pm -
1 stop14h 15m
Tue 10/278:17 pm -
1 stop22h 23m
Deal found 9/18$140
Thu 11/196:00 am -
Nonstop1h 57m
Mon 11/232:42 pm -
Nonstop2h 28m
Deal found 9/18$140
Fri 10/96:00 am -
Nonstop2h 03m
Mon 10/129:58 am -
Nonstop2h 23m
Deal found 9/17$145
Wed 11/186:44 pm -
1 stop4h 49m
Thu 11/1910:16 am -
1 stop9h 23m
Deal found 9/17$146

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

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$121

One-way from

$53
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$243

Good round-trip deal

$183 or less

Good one-way deal

$152 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. 16% potential increase in price ($57 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in September 2026
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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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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

Cheapest round-trip

St. LouisBaltimore

STL Lambert-St Louis - BWI Baltimore/Washington

STLBWI

Lambert-St Louis

Fri 10/16

6:35 pm-4:47 pm

1 stop21h 12m

Baltimore/Washington

Wed 12/31

12:00 am-11:00 pm

Nonstop0h 00m

$91

St. LouisWashington, D.C.

STL Lambert-St Louis - IAD Washington, D.C. Dulles Intl

STLIAD

Lambert-St Louis

Fri 10/23

5:53 pm-5:13 pm

2 stops22h 20m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-11:00 pm

Nonstop0h 00m

$103

ChicagoBaltimore

MDW Chicago Midway - BWI Baltimore/Washington

MDWBWI

Chicago Midway

Wed 10/7

5:30 am-8:25 am

Nonstop1h 55m

Baltimore/Washington

Wed 12/31

12:00 am-11:00 pm

Nonstop0h 00m

$105

ChicagoBaltimore

ORD Chicago O'Hare Intl - BWI Baltimore/Washington

ORDBWI

Chicago O'Hare Intl

Wed 11/18

4:05 pm-7:09 pm

Nonstop2h 04m

Baltimore/Washington

Wed 12/31

12:00 am-11:00 pm

Nonstop0h 00m

$105

ChicagoBaltimore

MDW Chicago Midway - BWI Baltimore/Washington

MDWBWI

Chicago Midway

Tue 10/20

6:30 pm-9:25 pm

Nonstop1h 55m

Baltimore/Washington

Wed 12/31

12:00 am-11:00 pm

Nonstop0h 00m

$105
Quickest round-trip

ChicagoBaltimore

ORD Chicago O'Hare Intl - BWI Baltimore/Washington

ORDBWI

Chicago O'Hare Intl

Wed 12/16

6:50 am-9:44 am

Nonstop1h 54m

Baltimore/Washington

Wed 12/31

12:00 am-11:00 pm

Nonstop0h 00m

$105

ChicagoBaltimore

MDW Chicago Midway - BWI Baltimore/Washington

MDWBWI

Chicago Midway

Tue 10/13

5:30 am-8:25 am

Nonstop1h 55m

Baltimore/Washington

Wed 12/31

12:00 am-11:00 pm

Nonstop0h 00m

$105

ChicagoWashington, D.C.

ORD Chicago O'Hare Intl - IAD Washington, D.C. Dulles Intl

ORDIAD

Chicago O'Hare Intl

Sat 10/17

2:37 pm-5:44 pm

Nonstop2h 07m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-11:00 pm

Nonstop0h 00m

$108

ChicagoWashington, D.C.

MDW Chicago Midway - DCA Washington, D.C. Reagan-National

MDWDCA

Chicago Midway

Tue 10/20

5:09 pm-10:49 pm

1 stop4h 40m

Washington, D.C. Reagan-National

Wed 12/31

12:00 am-11:00 pm

Nonstop0h 00m

$109

ChicagoWashington, D.C.

MDW Chicago Midway - IAD Washington, D.C. Dulles Intl

MDWIAD

Chicago Midway

Wed 12/9

6:00 am-11:39 am

1 stop4h 39m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-11:00 pm

Nonstop0h 00m

$109

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 60 resultsSorted by cheapest first
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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

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, December is the cheapest month in which you can book a flight from Illinois to Washington, D.C. (average of $301). Flying from Illinois to Washington, D.C. in June is currently the most expensive (average of $404). 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?

One of the essential ways to save on airfare from Illinois to Washington, D.C. is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the morning could potentially save you up to 15% on airfare.

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

The most flights from USIL to WAS are scheduled on a Saturday (88 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (34 on average).

How much does it cost to fly round-trip from Illinois to Washington, D.C.?

Airfare is below average for this route at the moment.
Illinois to Washington, D.C. flights typically cost between $200 and $392 in October.
The cheapest round-trip price found within the last 5 days was $130 on Frontier (Oct 29-Nov 2).

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

The price you pay for your flight from Illinois to Washington, D.C. may vary depending on when you book. For the best chance of a lower fare, look to book 83 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Travelers seeking maximum savings on their Illinois to Washington, D.C. flight should consider departing on Thursday at noon when fares are most often at their lowest. Monday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Related info for your journey

  • How long is the flight from Illinois to Washington, D.C.?

    Airlines like United Airlines, Southwest, and Delta fly from Illinois to Washington, D.C. in about 1h 50m. The time it takes to get you to your destination can typically vary by up to 1h 33m. The distance between Illinois and Washington, D.C. is about 609 mi. This flight may include one or multiple stops.

  • 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 $49. However, be on the lookout for offers from American 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 - Baltimore/Washington, Chicago O'Hare Intl - Washington, D.C. Dulles Intl or Chicago O'Hare Intl - Washington, D.C. Reagan-National 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: Egyptair (96%), Avianca (92%), ITA Airways (90%).

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

    On average you can expect to pay $2,295 for a flight from Illinois to Washington, D.C.. The cheapest flight overall is $128 while the most popular route, (Chicago O'Hare Intl - Baltimore/Washington) is currently priced at $79.

  • 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, December is the cheapest month in which you can book a flight from Illinois to Washington, D.C. (average of $301). Flying from Illinois to Washington, D.C. in June is currently the most expensive (average of $404). 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 Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
Arlington
Owings Mills
Lanham
Tysons
Woodbridge
Reston
Herndon
Hyattsville
Rockville
Fredericksburg
Falls Church
Hanover
Laurel
Springfield
Oxon Hill
Clinton
Hunt Valley
Silver Spring
Largo

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Illinois to Washington, D.C.

Dallas/Fort Worth to Dulles Intl flights
Boston to Reagan-National flights
Los Angeles to Dulles Intl flights
Los Angeles to Reagan-National flights
Seattle to Dulles Intl flights
Atlanta to Dulles Intl flights
Boston to Dulles Intl flights
San Francisco to Dulles Intl flights
O'Hare Intl to Dulles Intl flights
San Francisco to Reagan-National flights
O'Hare Intl to Reagan-National flights
Orlando to Dulles Intl flights
Dallas/Fort Worth to Reagan-National flights
Seattle to Reagan-National flights
Orlando to Reagan-National flights
Atlanta to Reagan-National flights
John F Kennedy Intl to Reagan-National flights
Denver to Dulles Intl flights
Minneapolis to Reagan-National flights
Tampa to Dulles Intl flights
Hobby to Dulles Intl flights
John F Kennedy Intl to Dulles Intl flights
Austin to Dulles Intl flights
San Diego to Dulles Intl flights
Newark to Reagan-National flights
Hobby to Reagan-National flights
Minneapolis to Dulles Intl flights
George Bush Intcntl to Dulles Intl flights
Miami to Reagan-National flights
Ontario to Dulles Intl flights
Denver to Reagan-National flights
Fort Lauderdale to Reagan-National flights
Midway to Dulles Intl flights
LaGuardia to Reagan-National flights
Miami to Dulles Intl flights
Indianapolis to Dulles Intl flights
Newark to Dulles Intl flights
Fort Lauderdale to Dulles Intl flights
Detroit to Reagan-National flights
LaGuardia to Dulles Intl flights
Sky Harbor Intl to Dulles Intl flights
Midway to Reagan-National flights
Detroit to Dulles Intl flights
George Bush Intcntl to Reagan-National flights
Charlotte to Dulles Intl flights
Jacksonville to Dulles Intl flights
Providence to Dulles Intl flights
Ontario to Reagan-National flights
Austin to Reagan-National flights
Nashville to Reagan-National flights

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

AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$56Average$205FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$141Average$248FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$149Average$370FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$188Average$365FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$189Average$414FlexibilityNo cancel feeOn-time71%
DeltaCheapest$251Average$379FlexibilityNo cancel feeOn-timeN/A

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