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Cheap flights from Illinois to Washington, D.C. from $72

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 10/31. 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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Cheap round-trip flights

Frontier Logo
3:18 pm - 12:11 amORD-IAD
7h 53m1 stop
Frontier Logo
6:00 am - 10:38 amIAD-ORD
5h 38m1 stop
$133Frontier
Find Deal
Thu, Nov 6 - Sun, Nov 9
Frontier Logo
3:18 pm - 12:11 amORD-IAD
7h 53m1 stop
Frontier Logo
6:00 am - 10:38 amIAD-ORD
5h 38m1 stop
$134Frontier
Find Deal
Thu, Nov 6 - Sun, Nov 9
Multiple Airlines Logo
6:00 am - 6:27 pmORD-IAD
11h 27m1 stop
Multiple Airlines Logo
5:00 am - 9:41 amIAD-ORD
5h 41m1 stop
$183Multiple Airlines
Find Deal
Thu, Oct 30 - Sun, Nov 2
Multiple Airlines Logo
1:56 pm - 8:20 pmMDW-IAD
5h 24m1 stop
Multiple Airlines Logo
3:00 pm - 6:46 pmIAD-MDW
4h 46m1 stop
$189Multiple Airlines
Find Deal
Wed, Nov 19 - Fri, Nov 21
Delta Logo
5:00 pm - 11:18 pmMLI-IAD
5h 18m1 stop
Delta Logo
3:33 pm - 10:20 pmIAD-MLI
7h 47m1 stop
$224Delta
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Fri, Oct 31 - Tue, Nov 4
Delta Logo
5:00 pm - 11:18 pmMLI-IAD
5h 18m1 stop
Delta Logo
5:52 pm - 10:20 pmIAD-MLI
5h 28m1 stop
$249Delta
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Tue, Oct 21 - Sat, Oct 25
United Airlines Logo
1:24 pm - 9:17 pmPIA-IAD
6h 53m1 stop
United Airlines Logo
8:20 am - 12:38 pmIAD-PIA
5h 18m1 stop
$249United Airlines
Find Deal
Sat, Jan 24 - Fri, Jan 30
United Airlines Logo
6:00 am - 11:55 amPIA-IAD
4h 55m1 stop
United Airlines Logo
6:30 am - 10:13 amIAD-PIA
4h 43m1 stop
$259United Airlines
Find Deal
Thu, Oct 9 - Sun, Oct 12
American Airlines Logo
6:20 am - 6:54 pmMLI-IAD
11h 34m2 stops
American Airlines Logo
6:34 am - 4:57 pmIAD-MLI
11h 23m2 stops
$259American Airlines
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Tue, Oct 21 - Sat, Oct 25
American Airlines Logo
5:00 am - 1:12 pmPIA-IAD
7h 12m1 stop
American Airlines Logo
8:09 pm - 12:06 amIAD-PIA
4h 57m1 stop
$279American Airlines
Find Deal
Fri, Nov 21 - Sun, Nov 23

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

Our best Frontier deals on Illinois to Washington, D.C. Dulles Intl Airport flight tickets
Frontier
Nov 6
ORD3:18 pmChicago O'Hare Intl
7h 53m
1 stop
IAD12:11 amWashington, D.C. Dulles Intl
Nov 9
IAD6:00 amWashington, D.C. Dulles Intl
5h 38m
1 stop
ORD10:38 amChicago O'Hare Intl
$133
Find similar
Frontier
Nov 6
ORD3:18 pmChicago O'Hare Intl
7h 53m
1 stop
IAD12:11 amWashington, D.C. Dulles Intl
Nov 9
IAD6:00 amWashington, D.C. Dulles Intl
5h 38m
1 stop
ORD10:38 amChicago O'Hare Intl
$134
Find similar
Frontier
Nov 2
MDW10:12 amChicago Midway
8h 39m
1 stop
IAD7:51 pmWashington, D.C. Dulles Intl
Nov 6
IAD5:34 pmWashington, D.C. Dulles Intl
5h 29m
1 stop
MDW10:03 pmChicago Midway
$135
Find similar

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
Jan 24
PIA1:24 pmGreater Peoria
6h 53m
1 stop
IAD9:17 pmWashington, D.C. Dulles Intl
Jan 30
IAD8:20 amWashington, D.C. Dulles Intl
5h 18m
1 stop
PIA12:38 pmGreater Peoria
$249
Find similar
United Airlines
Oct 9
PIA6:00 amGreater Peoria
4h 55m
1 stop
IAD11:55 amWashington, D.C. Dulles Intl
Oct 12
IAD6:30 amWashington, D.C. Dulles Intl
4h 43m
1 stop
PIA10:13 amGreater Peoria
$259
Find similar
United Airlines
Mar 5
MLI5:42 pmMoline Quad-City
5h 15m
1 stop
IAD11:57 pmWashington, D.C. Dulles Intl
Mar 7
IAD5:15 pmWashington, D.C. Dulles Intl
4h 43m
1 stop
MLI8:58 pmMoline Quad-City
$269
Find similar

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 September 25, 2025.
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.

ORD - IAD

ORDIAD

Chicago O'Hare Intl

Thu 11/6

3:18 pm-12:11 am

1 stop7h 53m

Washington, D.C. Dulles Intl

Sun 11/9

6:00 am-10:38 am

1 stop5h 38m

$133

ChicagoWashington, D.C.

ORD - IAD

ORDIAD

Chicago O'Hare Intl

Thu 11/6

3:18 pm-12:11 am

1 stop7h 53m

Washington, D.C. Dulles Intl

Sun 11/9

6:00 am-10:38 am

1 stop5h 38m

$134

ChicagoWashington, D.C.

ORD - IAD

ORDIAD

Chicago O'Hare Intl

Thu 10/30

6:00 am-6:27 pm

1 stop11h 27m

Washington, D.C. Dulles Intl

Sun 11/2

5:00 am-9:41 am

1 stop5h 41m

$183

ChicagoWashington, D.C.

MDW - IAD

MDWIAD

Chicago Midway

Wed 11/19

1:56 pm-8:20 pm

1 stop5h 24m

Washington, D.C. Dulles Intl

Fri 11/21

3:00 pm-6:46 pm

1 stop4h 46m

$189

MolineWashington, D.C.

MLI - IAD

MLIIAD

Moline Quad-City

Fri 10/31

5:00 pm-11:18 pm

1 stop5h 18m

Washington, D.C. Dulles Intl

Tue 11/4

3:33 pm-10:20 pm

1 stop7h 47m

$224

MolineWashington, D.C.

MLI - IAD

MLIIAD

Moline Quad-City

Tue 10/21

5:00 pm-11:18 pm

1 stop5h 18m

Washington, D.C. Dulles Intl

Sat 10/25

5:52 pm-10:20 pm

1 stop5h 28m

$249

PeoriaWashington, D.C.

PIA - IAD

PIAIAD

Greater Peoria

Sat 1/24

1:24 pm-9:17 pm

1 stop6h 53m

Washington, D.C. Dulles Intl

Fri 1/30

8:20 am-12:38 pm

1 stop5h 18m

$249

PeoriaWashington, D.C.

PIA - IAD

PIAIAD

Greater Peoria

Thu 10/9

6:00 am-11:55 am

1 stop4h 55m

Washington, D.C. Dulles Intl

Sun 10/12

6:30 am-10:13 am

1 stop4h 43m

$259

MolineWashington, D.C.

MLI - IAD

MLIIAD

Moline Quad-City

Tue 10/21

6:20 am-6:54 pm

2 stops11h 34m

Washington, D.C. Dulles Intl

Sat 10/25

6:34 am-4:57 pm

2 stops11h 23m

$259

PeoriaWashington, D.C.

PIA - IAD

PIAIAD

Greater Peoria

Fri 11/21

5:00 am-1:12 pm

1 stop7h 12m

Washington, D.C. Dulles Intl

Sun 11/23

8:09 pm-12:06 am

1 stop4h 57m

$279

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 April is also cheap. Prices for this month can be found on momondo for an average of $272.

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 $552. 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 $770.

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 $462 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 $307 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 $247 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

$232

Fastest flight time

1h 49m

Direct flights

Every day
The best one-way flight to Washington, D.C. Dulles Intl Airport from Illinois in the past 72 hours is $232. The best round-trip flight deal from Illinois to Washington, D.C. Dulles Intl Airport found on momondo in the last 72 hours is $351.
The fastest flight from Illinois to Washington, D.C. Dulles Intl Airport takes 1h 49m
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 $95Free CancellationRating
5.8
3,162 reviews
Search Frontier flights
DeltaPriceFrom $176Free CancellationRating
7.9
7,973 reviews
Search Delta flights
United AirlinesPriceFrom $189Free CancellationRating
7.4
8,928 reviews
Search United Airlines flights
American AirlinesPriceFrom $258Free CancellationRating
7.2
10,000 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
Gettysburg
National Harbor
Arlington
Winchester
Woodbridge
Waldorf
Tysons
Laurel
Colonial Beach
Silver Spring
Fredericksburg
Harpers Ferry
Towson
Rockville
Manassas
Fairfax
Reston
Glen Burnie
Gaithersburg

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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