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Cheap flights from Illinois to Washington, D.C. from $62

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Washington, D.C. departing on 3/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Illinois to Washington, D.C.

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
2:41 pm - 12:31 am
MDW
-
IAD
8h 50m
1 stop
Frontier Logo
5:05 am - 10:09 pm
IAD
-
MDW
18h 04m
1 stop
$142Frontier
Thu, Mar 12 - Sat, Mar 14
Frontier Logo
8:30 am - 9:25 am
ORD
-
IAD
23h 55m
1 stop
Frontier Logo
8:09 am - 3:28 pm
IAD
-
ORD
8h 19m
1 stop
$143Frontier
Wed, Mar 4 - Mon, Mar 9
Multiple Airlines Logo
4:44 pm - 12:31 am
ORD
-
IAD
6h 47m
1 stop
Multiple Airlines Logo
7:00 am - 12:40 am
IAD
-
ORD
18h 40m
2 stops
$147Multiple Airlines
Sat, Mar 7 - Tue, Mar 10
Multiple Airlines Logo
6:51 pm - 12:31 am
ORD
-
IAD
28h 40m
2 stops
Multiple Airlines Logo
6:20 am - 5:57 pm
IAD
-
ORD
12h 37m
1 stop
$156Multiple Airlines
Fri, Mar 6 - Wed, Mar 11
United Airlines Logo
2:51 pm - 9:18 pm
PIA
-
IAD
5h 27m
1 stop
United Airlines Logo
6:15 am - 10:03 am
IAD
-
PIA
4h 48m
1 stop
$260United Airlines
Sat, Feb 28 - Sun, Mar 8
United Airlines Logo
8:15 am - 4:05 pm
MLI
-
IAD
6h 50m
1 stop
United Airlines Logo
8:30 am - 2:12 pm
IAD
-
MLI
6h 42m
1 stop
$260United Airlines
Wed, Mar 4 - Sun, Mar 8
Delta Logo
12:02 pm - 6:33 pm
BMI
-
IAD
5h 31m
1 stop
Delta Logo
6:01 am - 11:19 am
IAD
-
BMI
6h 18m
1 stop
$269Delta
Tue, Mar 10 - Sun, Mar 15
Delta Logo
3:36 pm - 8:45 pm
BMI
-
IAD
4h 09m
1 stop
Delta Logo
10:57 am - 2:54 pm
IAD
-
BMI
4h 57m
1 stop
$279Delta
Thu, Feb 19 - Sat, Feb 21
American Airlines Logo
6:10 am - 4:34 pm
PIA
-
IAD
9h 24m
1 stop
American Airlines Logo
2:03 pm - 5:53 pm
IAD
-
PIA
4h 50m
1 stop
$279American Airlines
Wed, Feb 18 - Sat, Feb 21
American Airlines Logo
5:00 am - 2:39 pm
SPI
-
IAD
8h 39m
2 stops
American Airlines Logo
11:30 am - 7:45 pm
IAD
-
SPI
9h 15m
2 stops
$409American Airlines
Tue, Mar 3 - Tue, Mar 10

United Airlines flights from Illinois to Washington, D.C. Dulles Intl Airport

Our best United Airlines deals on Illinois to Washington, D.C. Dulles Intl Airport flight tickets
United Airlines
Mar 28
ORD5:45 pmChicago O'Hare Intl
1h 52m
IAD8:37 pmWashington, D.C. Dulles Intl
Mar 30
IAD10:30 pmWashington, D.C. Dulles Intl
2h 13m
ORD11:43 pmChicago O'Hare Intl
$193
United Airlines
May 5
ORD4:25 pmChicago O'Hare Intl
2h 03m
IAD7:28 pmWashington, D.C. Dulles Intl
May 12
IAD10:08 amWashington, D.C. Dulles Intl
2h 18m
ORD11:26 amChicago O'Hare Intl
$197
United Airlines
Feb 14
ORD6:20 pmChicago O'Hare Intl
1h 58m
IAD9:18 pmWashington, D.C. Dulles Intl
Feb 21
IAD10:30 pmWashington, D.C. Dulles Intl
2h 13m
ORD11:43 pmChicago O'Hare Intl
$236

Delta flights from Illinois to Washington, D.C. Dulles Intl Airport

Our best Delta deals on Illinois to Washington, D.C. Dulles Intl Airport flight tickets
Delta
May 5
MDW6:00 amChicago Midway
4h 46m
1 stop
IAD11:46 amWashington, D.C. Dulles Intl
May 5
IAD5:27 pmWashington, D.C. Dulles Intl
6h 01m
1 stop
MDW10:28 pmChicago Midway
$217
Delta
Mar 10
BMI12:02 pmBloomington-Normal
5h 31m
1 stop
IAD6:33 pmWashington, D.C. Dulles Intl
Mar 15
IAD6:01 amWashington, D.C. Dulles Intl
6h 18m
1 stop
BMI11:19 amBloomington-Normal
$269
Delta
Feb 19
BMI3:36 pmBloomington-Normal
4h 09m
1 stop
IAD8:45 pmWashington, D.C. Dulles Intl
Feb 21
IAD10:57 amWashington, D.C. Dulles Intl
4h 57m
1 stop
BMI2:54 pmBloomington-Normal
$279

momondo Fare Finder

 
Customize your flight search to find flights from Illinois to Washington, D.C. Dulles Intl Airport 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, momondo users made 832,500 searches. Data last updated February 5, 2026.
Use the filters below to find and compare flights from Illinois to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoWashington, D.C.

MDW - IAD

MDWIAD

Chicago Midway

Thu 3/12

2:41 pm-12:31 am

1 stop8h 50m

Washington, D.C. Dulles Intl

Sat 3/14

5:05 am-10:09 pm

1 stop18h 04m

$142

ChicagoWashington, D.C.

ORD - IAD

ORDIAD

Chicago O'Hare Intl

Wed 3/4

8:30 am-9:25 am

1 stop23h 55m

Washington, D.C. Dulles Intl

Mon 3/9

8:09 am-3:28 pm

1 stop8h 19m

$143

ChicagoWashington, D.C.

ORD - IAD

ORDIAD

Chicago O'Hare Intl

Sat 3/7

4:44 pm-12:31 am

1 stop6h 47m

Washington, D.C. Dulles Intl

Tue 3/10

7:00 am-12:40 am

2 stops18h 40m

$147

ChicagoWashington, D.C.

ORD - IAD

ORDIAD

Chicago O'Hare Intl

Fri 3/6

6:51 pm-12:31 am

2 stops28h 40m

Washington, D.C. Dulles Intl

Wed 3/11

6:20 am-5:57 pm

1 stop12h 37m

$156

PeoriaWashington, D.C.

PIA - IAD

PIAIAD

Greater Peoria

Sat 2/28

2:51 pm-9:18 pm

1 stop5h 27m

Washington, D.C. Dulles Intl

Sun 3/8

6:15 am-10:03 am

1 stop4h 48m

$260

MolineWashington, D.C.

MLI - IAD

MLIIAD

Moline Quad-City

Wed 3/4

8:15 am-4:05 pm

1 stop6h 50m

Washington, D.C. Dulles Intl

Sun 3/8

8:30 am-2:12 pm

1 stop6h 42m

$260

BloomingtonWashington, D.C.

BMI - IAD

BMIIAD

Bloomington-Normal

Tue 3/10

12:02 pm-6:33 pm

1 stop5h 31m

Washington, D.C. Dulles Intl

Sun 3/15

6:01 am-11:19 am

1 stop6h 18m

$269

BloomingtonWashington, D.C.

BMI - IAD

BMIIAD

Bloomington-Normal

Thu 2/19

3:36 pm-8:45 pm

1 stop4h 09m

Washington, D.C. Dulles Intl

Sat 2/21

10:57 am-2:54 pm

1 stop4h 57m

$279

PeoriaWashington, D.C.

PIA - IAD

PIAIAD

Greater Peoria

Wed 2/18

6:10 am-4:34 pm

1 stop9h 24m

Washington, D.C. Dulles Intl

Sat 2/21

2:03 pm-5:53 pm

1 stop4h 50m

$279

SpringfieldWashington, D.C.

SPI - IAD

SPIIAD

Springfield Capital

Tue 3/3

5:00 am-2:39 pm

2 stops8h 39m

Washington, D.C. Dulles Intl

Tue 3/10

11:30 am-7:45 pm

2 stops9h 15m

$409

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from Illinois to Washington, D.C. Dulles Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Washington, D.C. Dulles Intl Airport?

In general, August is the cheapest month to fly from Illinois to Washington, D.C. Dulles Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $229. If you aren’t able to travel to Washington, D.C. Dulles Intl Airport during the month of August, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $238.

What is the cheapest day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Our data shows that Friday is the least expensive day to fly to Washington, D.C. Dulles Intl Airport. Tickets to fly out on this day can be as low as $580. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Illinois to Washington, D.C. Dulles Intl Airport for around $813.

What is the cheapest time of day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Flying to Washington, D.C. Dulles Intl Airport from Illinois in the morning is the least expensive time of day to depart. momondo users have found prices as low as $471 when looking at flights departing in the morning. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $995 on average. Flights to Washington, D.C. Dulles Intl Airport from Illinois at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Illinois to Washington, D.C. Dulles Intl flight route?

Fly from Chicago O'Hare Intl to Washington, D.C. Dulles Intl for the best Illinois - Washington, D.C. Dulles Intl flight prices

How far in advance should I book a flight to Washington, D.C. Dulles Intl Airport?

You are more likely to see cheaper flights to Washington, D.C. Dulles Intl Airport from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. Dulles Intl Airport for around $320 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. Dulles Intl Airport from Illinois for as low as $254 on momondo.

What cabin class options are available on Illinois to Washington, D.C. Dulles Intl flights?

There are 4 cabin classes available to choose from on Illinois to Washington, D.C. Dulles Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Illinois to Washington, D.C. Dulles Intl Airport flights?

No. A direct flight is the cheapest option for a flight between Illinois to Washington, D.C. Dulles Intl Airport.

Cheap Illinois to Washington, D.C. Dulles Intl Airport flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to Washington, D.C. Dulles Intl Airport

Best Price Found

$264

Fastest flight time

1h 44m

Direct flights

Every day
The best one-way flight to Washington, D.C. Dulles Intl Airport from Illinois in the past 72 hours is $264. The best round-trip flight deal from Illinois to Washington, D.C. Dulles Intl Airport found on momondo in the last 72 hours is $527.
The fastest flight from Illinois to Washington, D.C. Dulles Intl Airport takes 1h 44m
Direct flights go from Illinois to Washington, D.C. Dulles Intl Airport every day.
Search flight deals

  • When did momondo last update prices for flights from Illinois to Washington, D.C. Dulles Intl Airport?

    Prices for flights from Illinois to Washington, D.C. Dulles Intl Airport were last updated today.

  • How many operators does momondo search for flights from Illinois to Washington, D.C. Dulles Intl Airport?

  • How old do you have to be to fly from Illinois to Washington, D.C. Dulles Intl Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Illinois to Washington, D.C. Dulles Intl Airport.

  • What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?

    The travel and health documents required for your trip to Washington, D.C. Dulles Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Washington, D.C. Dulles Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Illinois to Washington, D.C. Dulles Intl Airport?

Best airlines flying from Illinois to Washington, D.C. Dulles Intl Airport

Compare and see reviews for airlines that fly from Illinois to Washington, D.C. Dulles Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $103Free CancellationRating
5.7
3,053 reviews
Search Frontier flights
United AirlinesPriceFrom $197Free CancellationRating
7.4
9,241 reviews
Search United Airlines flights
American AirlinesPriceFrom $258Free CancellationRating
7.2
11,237 reviews
Search American Airlines flights

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
National Harbor
Gettysburg
Arlington
Winchester
Waldorf
Woodbridge
Tysons
Laurel
Colonial Beach
Silver Spring
Towson
Fredericksburg
Gaithersburg
Rockville
Manassas
Springfield
Sterling
Fairfax
Linthicum Heights

Why use momondo?

Why should I use momondo to find a flight deal from Illinois to Washington, D.C.?

It is quick and easy to find Illinois to Washington, D.C. flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Washington, D.C. that suits you.

Can I find flights from Illinois to Washington, D.C. with flexible booking policies on momondo?

All flight searches from Illinois to Washington, D.C. on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Illinois to Washington, D.C.?

Once all potential Illinois to Washington, D.C. flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Illinois to Washington, D.C. right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Washington, D.C. from Illinois. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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