What airlines fly to Washington, D.C. Dulles Intl Airport?

United Airlines, Frontier and Delta are the top three most popular airlines that fly to Washington, D.C. Dulles Intl Airport from Chicago according to our data. United Airlines is the first choice among our users, with 91% of people opting to fly with this airline when traveling to Washington, D.C. Dulles Intl Airport. Keep in mind that there are 3 different airlines that fly to Washington, D.C. Dulles Intl Airport on a routine basis, so you have a few additional options to choose from.

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

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

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

As of July 2025, there are 26 flights per day flying from Chicago to Washington, D.C. Dulles Intl Airport. The most common time of day flights depart is 8:00AM, with 45% of flights taking off in the afternoon.

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

The number of operators available for flights from Chicago to Washington, D.C. Dulles Intl Airport is 3 as of July 2025.

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

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Chicago 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 you'll need for your trip to Washington, D.C. Dulles Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Washington, D.C. Dulles Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$59 Cheap Flights from Chicago to Washington, D.C. Dulles Intl Airport in 2025

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

As of July 2025, 186 flights take off from Chicago and land in Washington, D.C. Dulles Intl Airport each week. The most common flight departure day for this route is Fri, with 16% of weekly flights taking off on this day.

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One-way

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Cheap round-trip flights

2:24 pm - 5:30 pmORD-IAD

2h 06mnonstop

6:40 pm - 7:48 pmIAD-ORD

2h 08mnonstop

$117United Airlines

Find Deal

Tue, Aug 12 - Tue, Aug 19

11:40 am - 2:37 pmORD-IAD

1h 57mnonstop

1:15 pm - 2:29 pmIAD-ORD

2h 14mnonstop

$123United Airlines

Find Deal

Mon, Sep 15 - Tue, Sep 16

2:32 pm - 5:30 pmORD-IAD

1h 58mnonstop

10:10 pm - 11:15 pmIAD-ORD

2h 05mnonstop

$129United Airlines

Find Deal

Mon, Aug 25 - Mon, Sep 1

9:31 pm - 12:32 amORD-IAD

2h 01mnonstop

6:35 am - 7:46 amIAD-ORD

2h 11mnonstop

$131United Airlines

Find Deal

Wed, Aug 27 - Thu, Aug 28

5:45 pm - 11:55 pmORD-IAD

5h 10m1 stop

7:00 am - 4:49 pmIAD-ORD

10h 49m1 stop

$154Frontier

Find Deal

Sat, Sep 13 - Sat, Sep 20

9:00 am - 7:46 pmMDW-IAD

9h 46m1 stop

6:10 am - 3:58 pmIAD-MDW

10h 48m1 stop

$161Frontier

Find Deal

Wed, Sep 17 - Fri, Sep 19

6:00 am - 11:40 amMDW-IAD

4h 40m1 stop

5:25 pm - 9:36 pmIAD-MDW

5h 11m1 stop

$197Delta

Find Deal

Thu, Sep 11 - Mon, Sep 15

7:10 am - 11:32 amORD-IAD

3h 22m1 stop

6:00 am - 10:04 amIAD-ORD

5h 04m1 stop

$197Delta

Find Deal

Sat, Aug 9 - Sat, Aug 16

11:36 am - 10:44 amORD-IAD

22h 08m2 stops

4:56 pm - 9:21 amIAD-ORD

17h 25m2 stops

$203

Find Deal

Sat, Aug 23 - Sun, Aug 24

10:53 am - 12:32 pmMDW-IAD

24h 39m2 stops

1:22 pm - 6:17 pmIAD-MDW

5h 55m1 stop

$227Allegiant Air

Find Deal

Thu, Aug 14 - Mon, Aug 18

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

Our best Delta deals on Chicago to Washington, D.C. Dulles Intl Airport flight tickets

Delta

Sep 11

MDW6:00 amChicago Midway

4h 40m

1 stop

IAD11:40 amWashington, D.C. Dulles Intl

Sep 15

IAD5:25 pmWashington, D.C. Dulles Intl

5h 11m

1 stop

MDW9:36 pmChicago Midway

$197

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Delta

Aug 27

ORD7:15 amChicago O'Hare Intl

3h 17m

1 stop

IAD11:32 amWashington, D.C. Dulles Intl

Aug 31

IAD6:00 amWashington, D.C. Dulles Intl

5h 20m

1 stop

ORD10:20 amChicago O'Hare Intl

$198

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Delta

Aug 23

MDW6:04 amChicago Midway

4h 19m

1 stop

IAD11:23 amWashington, D.C. Dulles Intl

Aug 23

IAD5:25 pmWashington, D.C. Dulles Intl

4h 47m

1 stop

MDW9:12 pmChicago Midway

$199

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

Our best United Airlines deals on Chicago to Washington, D.C. Dulles Intl Airport flight tickets

United Airlines

Aug 12

ORD2:24 pmChicago O'Hare Intl

2h 06m

IAD5:30 pmWashington, D.C. Dulles Intl

Aug 19

IAD6:40 pmWashington, D.C. Dulles Intl

2h 08m

ORD7:48 pmChicago O'Hare Intl

$117

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United Airlines

Sep 15

ORD11:40 amChicago O'Hare Intl

1h 57m

IAD2:37 pmWashington, D.C. Dulles Intl

Sep 16

IAD1:15 pmWashington, D.C. Dulles Intl

2h 14m

ORD2:29 pmChicago O'Hare Intl

$123

Find similar

United Airlines

Aug 25

ORD2:32 pmChicago O'Hare Intl

1h 58m

IAD5:30 pmWashington, D.C. Dulles Intl

Sep 1

IAD10:10 pmWashington, D.C. Dulles Intl

2h 05m

ORD11:15 pmChicago O'Hare Intl

$129

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How to get the cheapest flight ticket from Chicago 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 Chicago 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 $248. If you aren’t able to travel to Washington, D.C. Dulles Intl Airport during the month of August, then flying in May is also cheap. Prices for this month can be found on momondo for an average of $274.

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 $513. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Chicago to Washington, D.C. Dulles Intl Airport for around $725.

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 Chicago in the morning is the least expensive time of day to depart. momondo users have found prices as low as $460 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 $954 on average. Flights to Washington, D.C. Dulles Intl Airport from Chicago at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

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

Fly from Chicago O'Hare Intl to Washington, D.C. Dulles Intl for the best Chicago - 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 Chicago 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 $310 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 Chicago for as low as $240 on momondo.

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

There are 4 cabin classes available to choose from on Chicago 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 Chicago to Washington, D.C. Dulles Intl Airport flights?

You could potentially save up to 6% on your flight if you consider stops on a Chicago to Washington, D.C. Dulles Intl Airport flight.

How have Chicago to Washington, D.C. Dulles Intl Airport flight prices changed over time?

As of July 2025, prices for Chicago to Washington, D.C. Dulles Intl Airport flights are approximately 34% cheaper when compared to flights at the same time last year.

When to book flights from Chicago to Washington, D.C. Dulles Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Chicago to Washington, D.C. Dulles Intl Airport according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Chicago to Washington, D.C. Dulles Intl Airport (CHI to IAD) flight deals and tips

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

Best Price Found	$59
Fastest flight time	1h 49m
Direct flights	Every day

The best one-way flight to Washington, D.C. Dulles Intl Airport from Chicago in the past 72 hours is $59. The best round-trip flight deal from Chicago to Washington, D.C. Dulles Intl Airport found on momondo in the last 72 hours is $117.

The fastest flight from Chicago to Washington, D.C. Dulles Intl Airport takes 1h 49m

Direct flights go from Chicago to Washington, D.C. Dulles Intl Airport every day.

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How far is Chicago to Washington, D.C. Dulles Intl by plane?
The straight-line distance from Chicago to Washington, D.C. Dulles Intl is 571.5 mi. Flights usually cover this in 1h 51m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Chicago to Washington, D.C. Dulles Intl Airport?
Prices for flights from Chicago to Washington, D.C. Dulles Intl Airport refresh daily.
How many operators does momondo search for flights from Chicago to Washington, D.C. Dulles Intl Airport?
The number of operators available for flights from Chicago to Washington, D.C. Dulles Intl Airport is 3 as of July 2025.
How old do you have to be to fly from Chicago to Washington, D.C. Dulles Intl Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Chicago 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 you'll need for your trip to Washington, D.C. Dulles Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Washington, D.C. Dulles Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Chicago to Washington, D.C. Dulles Intl Airport?
Based on momondo bookings for flights between Chicago and Washington, D.C. Dulles Intl Airport, the leading plane model is Boeing 737-900, making up 10.84% of the total bookings. Other popular models include Boeing 787 Dreamliner with 10.42%, Boeing 757-200 with 10.39%, and Boeing 787-8 Dreamliner with 9.41%.
What is the most popular airline from Chicago to Washington, D.C. Dulles Intl Airport?
Based on momondo bookings for flights between Chicago and Washington, D.C. Dulles Intl Airport, the leading airline is United Airlines, making up 95% of the total bookings. Other popular airlines include Frontier with 5%.

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

Compare and see reviews for airlines that fly from Chicago to Washington, D.C. Dulles Intl Airport with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $95	Free Cancellation	Rating 5.9 3,268 reviews	Search Frontier flights
Delta	PriceFrom $176	Free Cancellation	Rating 8.0 7,951 reviews	Search Delta flights
United Airlines	PriceFrom $179	Free Cancellation	Rating 7.4 8,853 reviews	Search United Airlines flights

United Airlines Flights From Chicago to Washington, D.C. Dulles Intl Airport
United Airlines operates around 40 flights from Chicago to Washington, D.C. Dulles Intl Airport every week. The average price of these flights found in the last 72 hours has been $305, but momondo users have found United Airlines deals from Chicago to Washington, D.C. Dulles Intl Airport from as low as $179 round-trip. United Airlines has been scored 7.4/10 in 8,853 reviews.

Alexandria

Gettysburg

Arlington

National Harbor

Winchester

Laurel

Woodbridge

Tysons

Silver Spring

Waldorf

Fredericksburg

Manassas

Harpers Ferry

Gaithersburg

Rockville

Towson

Fairfax

Colonial Beach

Glen Burnie

Linthicum Heights

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Washington, D.C. from Chicago.

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

Flights from Chicago to Washington, D.C. with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

momondo helps you find the best flight between Chicago and Washington, D.C. by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Chicago 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 Chicago. 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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Washington, D.C. Dulles Intl Airport flight routes

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Cheap flights from Chicago to Washington, D.C. from $59

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Chicago to Washington, D.C. departing on 8/9. 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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Delta flights from Chicago to Washington, D.C. Dulles Intl Airport

Our best Delta deals on Chicago to Washington, D.C. Dulles Intl Airport flight tickets

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

Our best United Airlines deals on Chicago to Washington, D.C. Dulles Intl Airport flight tickets

See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from Chicago 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?

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 Chicago to Washington, D.C. Dulles Intl flight route?

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

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

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

There are 4 cabin classes available to choose from on Chicago 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 Chicago to Washington, D.C. Dulles Intl Airport flights?

You could potentially save up to 6% on your flight if you consider stops on a Chicago to Washington, D.C. Dulles Intl Airport flight.

How have Chicago to Washington, D.C. Dulles Intl Airport flight prices changed over time?

As of July 2025, prices for Chicago to Washington, D.C. Dulles Intl Airport flights are approximately 34% cheaper when compared to flights at the same time last year.

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

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

What airlines fly to Washington, D.C. Dulles Intl Airport?

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

As of July 2025, there are 26 flights per day flying from Chicago to Washington, D.C. Dulles Intl Airport. The most common time of day flights depart is 8:00AM, with 45% of flights taking off in the afternoon.

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

As of July 2025, 186 flights take off from Chicago and land in Washington, D.C. Dulles Intl Airport each week. The most common flight departure day for this route is Fri, with 16% of weekly flights taking off on this day.

When to book flights from Chicago to Washington, D.C. Dulles Intl Airport

Cheap Chicago to Washington, D.C. Dulles Intl Airport (CHI to IAD) flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

How far is Chicago to Washington, D.C. Dulles Intl by plane?

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

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

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

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

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

What is the most popular airline from Chicago to Washington, D.C. Dulles Intl Airport?

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

Compare and see reviews for airlines that fly from Chicago to Washington, D.C. Dulles Intl Airport with momondo

United Airlines Flights From Chicago to Washington, D.C. Dulles Intl Airport

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

Why use momondo?

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

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

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

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

An easier way to manage your Washington, D.C. Dulles Intl Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Washington, D.C.

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