Which layover airport has the shortest travel time from Washington, D.C. Dulles Intl Airport to Denver?

Flights connecting via Atlanta (ATL) have the shortest average one-way travel time: 7h 05m.

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

As of October 2025, there are 21 flights per day flying from Washington, D.C. Dulles Intl Airport to Denver. The most common time of day flights depart is 5:00PM, with 59% of flights taking off in the afternoon.

Which airport is the most popular layover for flights between Washington, D.C. Dulles Intl Airport and Denver?

Atlanta (ATL) was the most common stop: 67% of momondo users choosing 1-stop flights on this route connected there.

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

The number of flights available between Washington, D.C. Dulles Intl Airport and Denver is 147 per week as of October 2025. The most frequent departure day is Thu, with 17% of weekly flights leaving on this day.

What airlines fly to Denver?

United Airlines, Southwest and Frontier are the top three most popular airlines that fly to Denver from Washington, D.C. Dulles Intl Airport according to our data. United Airlines is the first choice among our users, with 61% of people opting to fly with this airline when traveling to Denver. Keep in mind that there are 5 different airlines that fly to Denver on a routine basis, so you have a few additional options to choose from.

Which layover airport has the shortest connection time from Washington, D.C. Dulles Intl Airport to Denver?

Orlando (MCO) has the shortest average layover time for this route: 2h 04m.

Which layover airport offers the lowest fares from Washington, D.C. Dulles Intl Airport to Denver?

Flights via Orlando (MCO) offer the lowest average round-trip price of $148.

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

Frontier, Southwest, and United Airlines are the most popular carriers operating from Washington, D.C. Dulles Intl to Denver Intl

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

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

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

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. Dulles Intl Airport to Denver Intl Airport.

What documentation or ID do you need to fly to Denver Intl Airport?

The travel and health documents you'll need for your trip to Denver 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 Denver Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$76 Cheap Flights from Washington, D.C. Dulles Intl Airport to Denver in 2025/26

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8:47 am - 1:45 pmIAD-DEN

6h 58m1 stop

12:59 am - 4:34 pmDEN-IAD

13h 35m1 stop

$132Frontier

Find Deal

Wed, Oct 29 - Wed, Nov 5

8:47 am - 1:45 pmIAD-DEN

6h 58m1 stop

12:59 am - 11:55 pmDEN-IAD

20h 56m1 stop

$133Frontier

Find Deal

Wed, Oct 29 - Fri, Nov 7

6:00 am - 9:30 pmIAD-DEN

17h 30m1 stop

12:59 am - 8:20 pmDEN-IAD

17h 21m1 stop

$137Frontier

Find Deal

Thu, Oct 30 - Mon, Nov 3

6:18 pm - 9:03 amIAD-DEN

16h 45m1 stop

12:59 am - 8:20 pmDEN-IAD

17h 21m1 stop

$140Frontier

Find Deal

Mon, Nov 3 - Mon, Nov 10

5:18 pm - 7:20 pmIAD-DEN

4h 02mnonstop

11:59 pm - 5:16 amDEN-IAD

3h 17mnonstop

$141United Airlines

Find Deal

Thu, Nov 13 - Sun, Nov 16

10:10 pm - 12:15 amIAD-DEN

4h 05mnonstop

8:00 am - 1:18 pmDEN-IAD

3h 18mnonstop

$151United Airlines

Find Deal

Tue, Nov 11 - Tue, Nov 18

5:05 am - 7:00 amIAD-DEN

3h 55mnonstop

6:15 pm - 11:30 pmDEN-IAD

3h 15mnonstop

$161Southwest

Find Deal

Thu, Nov 6 - Mon, Nov 10

6:18 pm - 9:03 amIAD-DEN

16h 45m1 stop

8:00 am - 8:20 pmDEN-IAD

10h 20m2 stops

$175Multiple Airlines

Find Deal

Mon, Nov 3 - Tue, Nov 11

2:16 pm - 9:08 pmIAD-DEN

8h 52m1 stop

7:49 am - 4:49 pmDEN-IAD

7h 00m1 stop

$187American Airlines

Find Deal

Fri, Nov 7 - Tue, Nov 11

2:16 pm - 9:08 pmIAD-DEN

8h 52m1 stop

11:26 am - 11:59 pmDEN-IAD

10h 33m2 stops

$192American Airlines

Find Deal

Wed, Nov 12 - Sat, Nov 15

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

Our best Frontier deals on Washington, D.C. Dulles Intl Airport to Denver flight tickets

Frontier

Oct 29

IAD8:47 amWashington, D.C. Dulles Intl

6h 58m

1 stop

DEN1:45 pmDenver Intl

Nov 5

DEN12:59 amDenver Intl

13h 35m

1 stop

IAD4:34 pmWashington, D.C. Dulles Intl

$132

Find similar

Frontier

Oct 29

IAD8:47 amWashington, D.C. Dulles Intl

6h 58m

1 stop

DEN1:45 pmDenver Intl

Nov 7

DEN12:59 amDenver Intl

20h 56m

1 stop

IAD11:55 pmWashington, D.C. Dulles Intl

$133

Find similar

Frontier

Oct 30

IAD6:00 amWashington, D.C. Dulles Intl

17h 30m

1 stop

DEN9:30 pmDenver Intl

Nov 3

DEN12:59 amDenver Intl

17h 21m

1 stop

IAD8:20 pmWashington, D.C. Dulles Intl

$137

Find similar

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

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

United Airlines

Nov 13

IAD5:18 pmWashington, D.C. Dulles Intl

4h 02m

DEN7:20 pmDenver Intl

Nov 16

DEN11:59 pmDenver Intl

3h 17m

IAD5:16 amWashington, D.C. Dulles Intl

$141

Find similar

United Airlines

Nov 11

IAD10:10 pmWashington, D.C. Dulles Intl

4h 05m

DEN12:15 amDenver Intl

Nov 18

DEN8:00 amDenver Intl

3h 18m

IAD1:18 pmWashington, D.C. Dulles Intl

$151

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momondo Fare Finder

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

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Route

Depart

Return

Price

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Wed 10/29

8:47 am-1:45 pm

1 stop6h 58m

Denver Intl

Wed 11/5

12:59 am-4:34 pm

1 stop13h 35m

$132

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Wed 10/29

8:47 am-1:45 pm

1 stop6h 58m

Denver Intl

Fri 11/7

12:59 am-11:55 pm

1 stop20h 56m

$133

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Thu 10/30

6:00 am-9:30 pm

1 stop17h 30m

Denver Intl

Mon 11/3

12:59 am-8:20 pm

1 stop17h 21m

$137

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Mon 11/3

6:18 pm-9:03 am

1 stop16h 45m

Denver Intl

Mon 11/10

12:59 am-8:20 pm

1 stop17h 21m

$140

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Thu 11/13

5:18 pm-7:20 pm

Nonstop4h 02m

Denver Intl

Sun 11/16

11:59 pm-5:16 am

Nonstop3h 17m

$141

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Tue 11/11

10:10 pm-12:15 am

Nonstop4h 05m

Denver Intl

Tue 11/18

8:00 am-1:18 pm

Nonstop3h 18m

$151

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Thu 11/6

5:05 am-7:00 am

Nonstop3h 55m

Denver Intl

Mon 11/10

6:15 pm-11:30 pm

Nonstop3h 15m

$161

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Mon 11/3

6:18 pm-9:03 am

1 stop16h 45m

Denver Intl

Tue 11/11

8:00 am-8:20 pm

2 stops10h 20m

$175

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Fri 11/7

2:16 pm-9:08 pm

1 stop8h 52m

Denver Intl

Tue 11/11

7:49 am-4:49 pm

1 stop7h 00m

$187

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Wed 11/12

2:16 pm-9:08 pm

1 stop8h 52m

Denver Intl

Sat 11/15

11:26 am-11:59 pm

2 stops10h 33m

$192

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

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

Layovers

Other information

What is the cheapest month to fly to Denver?

The cheapest month to fly to Denver from Washington, D.C. Dulles Intl Airport is in September. Flight prices, which tend to average around $288, are often lower during this time because this is during the off-season. If you don’t want to visit Denver in September, then you should wait until January to fly from Washington, D.C. Dulles Intl Airport, when ticket prices are also cheap, with an average price of $307.

What is the cheapest day to depart on your flight to Denver?

The cheapest day to depart on your flight to Denver is on a Wednesday when prices can be found for as low as $302. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Denver is Sunday, with ticket prices averaging around $373.

What is the cheapest time of day to depart on your flight to Denver?

The cheapest time of day to fly to Denver is at noon when flights can be purchased for as low as $260. Flights in the evening are often more expensive with an average ticket price of $373.

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

Fly from Washington, D.C. Dulles Intl to Denver Intl for the best Washington, D.C. Dulles Intl - Denver Intl flight prices

How far in advance should I book a flight to Denver?

You are more likely to see cheaper flights to Denver from Washington, D.C. Dulles Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Denver for around $339 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Denver from Washington, D.C. Dulles Intl Airport for as low as $275 on momondo.

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

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

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

As of October 2025, prices for Washington, D.C. Dulles Intl Airport to Denver flights are approximately 1% cheaper when compared to flights at the same time last year.

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

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

Estimated round-trip price

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

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

Best Price Found	$188
Fastest flight time	3h 45m
Direct flights	Every day
Airports in Denver	1 airport

The best one-way flight to Denver from Washington, D.C. Dulles Intl Airport in the past 72 hours is $188. The best round-trip flight deal from Washington, D.C. Dulles Intl Airport to Denver found on momondo in the last 72 hours is $334.

The fastest flight from Washington, D.C. Dulles Intl Airport to Denver takes 3h 45m

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

There is 1 airport near Denver: Denver Intl (DEN)

Search flight deals

How far is Washington, D.C. Dulles Intl to Denver Intl by plane?
A flight from Washington, D.C. Dulles Intl to Denver Intl will travel around 1465.5 mi. Flights usually cover this in 3h 55m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Washington, D.C. Dulles Intl Airport to Denver Intl Airport?
Prices for flights from Washington, D.C. Dulles Intl Airport to Denver Intl Airport were last updated today.
How many operators does momondo search for flights from Washington, D.C. Dulles Intl Airport to Denver Intl Airport?
There are 5 operators available for flights from Washington, D.C. Dulles Intl Airport to Denver Intl Airport as of October 2025.
How old do you have to be to fly from Washington, D.C. Dulles Intl Airport to Denver Intl Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. Dulles Intl Airport to Denver Intl Airport.
What documentation or ID do you need to fly to Denver Intl Airport?
The travel and health documents you'll need for your trip to Denver 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 Denver 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 Washington, D.C. Dulles Intl Airport to Denver?
Based on momondo bookings for flights between Washington, D.C. Dulles Intl Airport and Denver, the leading plane model is Boeing 737 MAX 8, making up 16.08% of the total bookings. Other popular models include Boeing 737-900 with 14.26%, Boeing 737-800 Passenger/BBJ2 (winglets) with 11.07%, and Airbus A320neo with 10.46%.
What is the most popular airline from Washington, D.C. Dulles Intl Airport to Denver?
momondo data reveals that the most frequently booked airline on the route from Washington, D.C. Dulles Intl Airport to Denver is United Airlines, representing 61% of all bookings. The subsequent popular airlines are Southwest at 31%, Frontier at 8%, and American Airlines at 1%.

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

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

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $95	Free Cancellation	Rating 5.8 3,135 reviews	Search Frontier flights
American Airlines	PriceFrom $166	Free Cancellation	Rating 7.2 11,042 reviews	Search American Airlines flights
Southwest	PriceFrom $178	Free Cancellation	Rating 8.0 4,238 reviews	Search Southwest flights
United Airlines	PriceFrom $217	Free Cancellation	Rating 7.4 8,976 reviews	Search United Airlines flights
Delta	PriceFrom $236	Free Cancellation	Rating 7.9 7,975 reviews	Search Delta flights

Southwest Flights From Washington, D.C. Dulles Intl Airport to Denver
Southwest flight deals from Washington, D.C. Dulles Intl Airport to Denver start from $178 round-trip. Over the 13 Southwest flights for this route in a normal week, average airfare is usually $298 round-trip - but some users have found much cheaper deals with momondo.
United Airlines Flights From Washington, D.C. Dulles Intl Airport to Denver
The best United Airlines deal for Washington, D.C. Dulles Intl Airport to Denver flight tickets found on momondo in the last 72 hours was $217, round-trip. It should be noted that an average United Airlines flight deal for this route in this time was higher, at $373 round-trip. United Airlines operates 48 flights out of Washington, D.C. Dulles Intl Airport into Denver in an average week, so prices vary by time and availability. 8,976 United Airlines reviews by users on momondo have scored the airline at 7.4/10.

Breckenridge

Estes Park

Black Hawk

Aurora

Fort Collins

Keystone

Cripple Creek

Manitou Springs

Boulder

Longmont

Lakewood

Greeley

Thornton

Westminster

Winter Park

Copper Mountain

Silverthorne

Frisco

Grand Lake

Central City

Why use momondo?

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

It is quick and easy to find Washington, D.C. to Denver 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 Denver that suits you.

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

Yes. momondo enables you to select and highlight flights to Denver from Washington, D.C. with this policy.

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

momondo helps you find the best flight between Washington, D.C. and Denver 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 Washington, D.C. to Denver right now. Can momondo alert me if prices change?

Price alerts on flights to Denver from Washington, D.C. are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Denver 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.

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Cheap flights from Washington, D.C. Dulles Intl Airport to Denver from $76

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

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

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 Denver?

What is the cheapest day to depart on your flight to Denver?

The cheapest day to depart on your flight to Denver is on a Wednesday when prices can be found for as low as $302. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Denver is Sunday, with ticket prices averaging around $373.

What is the cheapest time of day to depart on your flight to Denver?

The cheapest time of day to fly to Denver is at noon when flights can be purchased for as low as $260. Flights in the evening are often more expensive with an average ticket price of $373.

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

Fly from Washington, D.C. Dulles Intl to Denver Intl for the best Washington, D.C. Dulles Intl - Denver Intl flight prices

How far in advance should I book a flight to Denver?

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

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

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

As of October 2025, prices for Washington, D.C. Dulles Intl Airport to Denver flights are approximately 1% cheaper when compared to flights at the same time last year.

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

Frontier, Southwest, and United Airlines are the most popular carriers operating from Washington, D.C. Dulles Intl to Denver Intl

What airlines fly to Denver?

Which airport is the most popular layover for flights between Washington, D.C. Dulles Intl Airport and Denver?

Atlanta (ATL) was the most common stop: 67% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from Washington, D.C. Dulles Intl Airport to Denver?

Flights via Orlando (MCO) offer the lowest average round-trip price of $148.

Which layover airport has the shortest travel time from Washington, D.C. Dulles Intl Airport to Denver?

Flights connecting via Atlanta (ATL) have the shortest average one-way travel time: 7h 05m.

Which layover airport has the shortest connection time from Washington, D.C. Dulles Intl Airport to Denver?

Orlando (MCO) has the shortest average layover time for this route: 2h 04m.

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

As of October 2025, there are 21 flights per day flying from Washington, D.C. Dulles Intl Airport to Denver. The most common time of day flights depart is 5:00PM, with 59% of flights taking off in the afternoon.

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

The number of flights available between Washington, D.C. Dulles Intl Airport and Denver is 147 per week as of October 2025. The most frequent departure day is Thu, with 17% of weekly flights leaving on this day.

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

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

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

Best Price Found

Fastest flight time

Direct flights

Airports in Denver

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

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

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

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

What documentation or ID do you need to fly to Denver Intl Airport?

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

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

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

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

Southwest Flights From Washington, D.C. Dulles Intl Airport to Denver

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

Traveling to a place near Denver?

Why use momondo?

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

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

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

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

An easier way to manage your Denver 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 the United States

Airports servicing Colorado