What is the cheapest airline that flies from Illinois to Washington, D.C. Dulles Intl?

Frontier, Allegiant Air, and United Airlines are the most popular carriers operating from Illinois to Washington, D.C. Dulles Intl

How long does it take to fly to Washington, D.C. Dulles Intl Airport?

Flight times from Illinois to Washington, D.C. Dulles Intl Airport vary, but if you’re flying out of Chicago and flying into Washington, D.C. Dulles Intl Airport (one of the most popular routes), then the duration is 2h 37m on average. Another popular route from Illinois to Washington, D.C. Dulles Intl Airport is flying from Moline to Washington, D.C. Dulles Intl Airport, which will take roughly 4h 18m. Keep in mind that layovers or delays could extend your travel time.

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

As of March 2026, there are 4 operators available to choose from 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.

$70 Cheap Flights from Illinois to Washington, D.C. Dulles Intl Airport in 2026

Q: How many flights depart from Illinois to Washington, D.C. Dulles Intl Airport on average per week?

As of March 2026, 136 flights take off from Illinois and land in Washington, D.C. Dulles Intl Airport each week. The most common flight departure day for this route is Tue, with 21% of weekly flights taking off on this day.

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

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

2:56 pm - 12:36 am

MDW

IAD

8h 40m

1 stop

10:51 am - 6:37 pm

IAD

MDW

8h 46m

1 stop

$198Frontier

Tue, Apr 7 - Sat, Apr 18

2:15 pm - 12:36 am

MDW

IAD

9h 21m

1 stop

11:12 am - 10:02 pm

IAD

MDW

11h 50m

1 stop

$199Frontier

Mon, May 4 - Wed, May 6

6:30 am - 11:48 am

STL

IAD

4h 18m

1 stop

5:41 pm - 11:57 pm

IAD

STL

7h 16m

1 stop

$242United Airlines

Tue, Apr 14 - Wed, Apr 22

8:30 am - 11:43 am

STL

IAD

2h 13mnonstop

9:00 am - 10:31 am

IAD

STL

2h 31mnonstop

$243United Airlines

Sat, Apr 18 - Sat, Apr 25

5:39 pm - 11:06 pm

PIA

IAD

4h 27m

1 stop

8:11 pm - 11:52 pm

IAD

PIA

4h 41m

1 stop

$291American Airlines

Tue, May 12 - Wed, May 13

12:04 pm - 11:59 pm

MLI

IAD

10h 55m

2 stops

5:59 pm - 11:26 pm

IAD

MLI

6h 27m

1 stop

$296American Airlines

Sat, May 16 - Tue, May 19

10:06 am - 11:35 am

SPI

IAD

24h 29m

1 stop

6:18 pm - 6:13 pm

IAD

SPI

24h 55m

1 stop

$305Multiple Airlines

Wed, Apr 29 - Sun, May 31

7:31 pm - 12:53 pm

SPI

IAD

16h 22m

1 stop

6:20 pm - 6:44 pm

IAD

SPI

25h 24m

1 stop

$313Multiple Airlines

Wed, Jun 10 - Sun, Jun 14

12:02 pm - 6:39 pm

BMI

IAD

5h 37m

1 stop

6:00 am - 11:19 am

IAD

BMI

6h 19m

1 stop

$329Delta

Sat, Apr 11 - Sat, Apr 25

4:04 pm - 11:20 pm

BMI

IAD

6h 16m

1 stop

6:00 am - 11:19 am

IAD

BMI

6h 19m

1 stop

$334Delta

Sat, Apr 11 - Sat, Apr 25

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

Apr 7

MDW2:56 pmChicago Midway

8h 40m

1 stop

IAD12:36 amWashington, D.C. Dulles Intl

Apr 18

IAD10:51 amWashington, D.C. Dulles Intl

8h 46m

1 stop

MDW6:37 pmChicago Midway

$198

Frontier

May 4

MDW2:15 pmChicago Midway

9h 21m

1 stop

IAD12:36 amWashington, D.C. Dulles Intl

May 6

IAD11:12 amWashington, D.C. Dulles Intl

11h 50m

1 stop

MDW10:02 pmChicago Midway

$199

Frontier

Apr 15

MDW2:15 pmChicago Midway

9h 21m

1 stop

IAD12:36 amWashington, D.C. Dulles Intl

Apr 18

IAD10:51 amWashington, D.C. Dulles Intl

8h 46m

1 stop

MDW6:37 pmChicago Midway

$200

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

Apr 18

ORD8:45 amChicago O'Hare Intl

2h 03m

IAD11:48 amWashington, D.C. Dulles Intl

Apr 27

IAD5:26 pmWashington, D.C. Dulles Intl

2h 18m

ORD6:44 pmChicago O'Hare Intl

$223

United Airlines

Apr 15

ORD1:00 pmChicago O'Hare Intl

2h 03m

IAD4:03 pmWashington, D.C. Dulles Intl

Apr 18

IAD1:10 pmWashington, D.C. Dulles Intl

2h 17m

ORD2:27 pmChicago O'Hare Intl

$224

United Airlines

Apr 17

ORD9:35 pmChicago O'Hare Intl

1h 57m

IAD12:32 amWashington, D.C. Dulles Intl

Apr 21

IAD8:20 amWashington, D.C. Dulles Intl

2h 18m

ORD9:38 amChicago O'Hare Intl

$233

momondo Fare Finder

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

Cheapest round-trip

ChicagoWashington, D.C.

MDW - IAD

MDWIAD

Chicago Midway

Tue 4/7

2:56 pm-12:36 am

1 stop8h 40m

Washington, D.C. Dulles Intl

Sat 4/18

10:51 am-6:37 pm

1 stop8h 46m

$198

ChicagoWashington, D.C.

MDW - IAD

MDWIAD

Chicago Midway

Mon 5/4

2:15 pm-12:36 am

1 stop9h 21m

Washington, D.C. Dulles Intl

Wed 5/6

11:12 am-10:02 pm

1 stop11h 50m

$199

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Tue 4/14

6:30 am-11:48 am

1 stop4h 18m

Washington, D.C. Dulles Intl

Wed 4/22

5:41 pm-11:57 pm

1 stop7h 16m

$242

Quickest round-trip

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Sat 4/18

8:30 am-11:43 am

Nonstop2h 13m

Washington, D.C. Dulles Intl

Sat 4/25

9:00 am-10:31 am

Nonstop2h 31m

$243

PeoriaWashington, D.C.

PIA - IAD

PIAIAD

Greater Peoria

Tue 5/12

5:39 pm-11:06 pm

1 stop4h 27m

Washington, D.C. Dulles Intl

Wed 5/13

8:11 pm-11:52 pm

1 stop4h 41m

$291

MolineWashington, D.C.

MLI - IAD

MLIIAD

Moline Quad-City

Sat 5/16

12:04 pm-11:59 pm

2 stops10h 55m

Washington, D.C. Dulles Intl

Tue 5/19

5:59 pm-11:26 pm

1 stop6h 27m

$296

SpringfieldWashington, D.C.

SPI - IAD

SPIIAD

Springfield Capital

Wed 4/29

10:06 am-11:35 am

1 stop24h 29m

Washington, D.C. Dulles Intl

Sun 5/31

6:18 pm-6:13 pm

1 stop24h 55m

$305

SpringfieldWashington, D.C.

SPI - IAD

SPIIAD

Springfield Capital

Wed 6/10

7:31 pm-12:53 pm

1 stop16h 22m

Washington, D.C. Dulles Intl

Sun 6/14

6:20 pm-6:44 pm

1 stop25h 24m

$313

BloomingtonWashington, D.C.

BMI - IAD

BMIIAD

Bloomington-Normal

Sat 4/11

12:02 pm-6:39 pm

1 stop5h 37m

Washington, D.C. Dulles Intl

Sat 4/25

6:00 am-11:19 am

1 stop6h 19m

$329

BloomingtonWashington, D.C.

BMI - IAD

BMIIAD

Bloomington-Normal

Sat 4/11

4:04 pm-11:20 pm

1 stop6h 16m

Washington, D.C. Dulles Intl

Sat 4/25

6:00 am-11:19 am

1 stop6h 19m

$334

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Other information

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 $581. 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 $901.

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 $524 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 $982 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 $327 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 $273 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?

You could potentially save up to 22% on your flight if you consider stops on a Illinois to Washington, D.C. Dulles Intl Airport flight.

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	$197
Fastest flight time	1h 54m
Direct flights	Every day

The best one-way flight to Washington, D.C. Dulles Intl Airport from Illinois in the past 72 hours is $197. The best round-trip flight deal from Illinois to Washington, D.C. Dulles Intl Airport found on momondo in the last 72 hours is $544.

The fastest flight from Illinois to Washington, D.C. Dulles Intl Airport takes 1h 54m

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?
As of March 2026, there are 4 operators available to choose from 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?
Based on momondo bookings for flights between Illinois and Washington, D.C. Dulles Intl Airport, the leading plane model is Boeing 787 Dreamliner, making up 15.38% of the total bookings. Other popular models include Boeing 737-900 with 10.08%, Boeing 787-8 Dreamliner with 7.39%, and Airbus A321neo with 7.35%.

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
Frontier	PriceFrom $103	Free Cancellation	Rating 5.7 3,017 reviews		Search Frontier flights
United Airlines	PriceFrom $210	Free Cancellation	Rating 7.4 9,474 reviews		Search United Airlines flights

Alexandria

National Harbor

Gettysburg

Arlington

Winchester

Waldorf

Woodbridge

Laurel

Colonial Beach

Gaithersburg

Towson

Silver Spring

Fredericksburg

Rockville

Tysons

Manassas

Sterling

Linthicum Heights

Springfield

Bethesda

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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Cheap flights from Illinois to Washington, D.C. from $70

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 5/6. 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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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

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

momondo Fare Finder

Use the filters below to find and compare flights from Illinois to Washington, D.C. Dulles Intl Airport that are best for you.

See travel insights to Washington, D.C. from

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

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

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

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

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

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

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

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

What is the cheapest airline that flies from Illinois to Washington, D.C. Dulles Intl?

How many flights depart from Illinois to Washington, D.C. Dulles Intl Airport on average per day?

How many flights depart from Illinois to Washington, D.C. Dulles Intl Airport on average per week?

How long does it take to fly 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

Fastest flight time

Direct flights

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

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Popular flights according to clicks in the last 7 days on momondo

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According to popular flight searches on momondo this year

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According to popular flight searches on momondo this year

Fly your favorite airline to Washington, D.C.

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List of cabin classes available on flights landing in Washington, D.C.. Availability may vary depending on flight origin and airline.

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