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

United Airlines, Delta, and JetBlue are the most popular carriers operating from Washington, D.C. to Denver Intl

What airlines fly to Denver?

Frontier, United Airlines and Southwest are the top three most popular airlines that fly to Denver from Washington, D.C. according to our data. Frontier is the first choice among our users, with 42% of people opting to fly with this airline when traveling to Denver. Keep in mind that there are 6 different airlines that fly to Denver on a routine basis, so you have a few additional options to choose from.

What day of the week experiences the fewest flight delays on this route?

Saturday is statistically the day of the week which experiences the fewest number of delays on this flight route. Thursday has historically seen more delays on average compared to the rest of the week.

What is the most punctual flight time for Washington, D.C. to Denver flights?

Generally, flights departing in the morning tend to experience fewer delays. Flights in the evening have, in the past, seen delays more frequently in comparison.

How long does it take to fly to Denver?

Flight times vary depending on what airport in Washington, D.C. you fly out of and what airport in Denver you fly into. For example, flying from Baltimore to Denver takes 3h 48m on average. On the other hand, flying from Washington, D.C. to Denver takes 3h 50m on average. Keep in mind that it’s always quicker to opt for a non-stop flight, so be sure to check momondo if there are any available for your route.

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

As of December 2025, there are 29 flights per day flying from Washington, D.C. to Denver. The most common time of day flights depart is 4:00PM, with 60% of flights taking off in the afternoon.

Which airline has the best punctuality record on Washington, D.C. to Denver flights?

According to our data, United Airlines have had the least number of delays on this route over the last 12 months; with about 14% of their flights experiencing any sort of delay.

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

As of December 2025, 203 flights take off from Washington, D.C. and land in Denver each week. The most common flight departure day for this route is Thu, with 18% of weekly flights taking off on this day.

How often are flights from Washington, D.C. to Denver delayed?

Historically, on average around 14% of flights between Washington, D.C. and Denver have experienced a delay on any given week. The average delay length over the past 12 months has been 160 minutes.

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

Prices for flights from Washington, D.C. to Denver Intl Airport refresh daily.

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

As of December 2025, there are 6 operators available to choose from for flights from Washington, D.C. to Denver Intl Airport.

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

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

The necessary travel and health documents for your Denver Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$58 Cheap Flights from Washington, D.C. to Denver in 2025/26

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6:00 am - 12:21 pm

IAD

DEN

8h 21m1 stop

12:05 am - 11:43 am

DEN

IAD

9h 38m1 stop

$134Frontier

Fri, Jan 9 - Mon, Jan 12

8:00 am - 10:13 am

DCA

DEN

4h 13mnonstop

4:38 pm - 9:59 pm

DEN

DCA

3h 21mnonstop

$136Frontier

Fri, Feb 13 - Sat, Feb 14

8:00 am - 10:22 am

DCA

DEN

4h 22mnonstop

4:38 pm - 9:59 pm

DEN

DCA

3h 21mnonstop

$138Frontier

Mon, Feb 23 - Fri, Feb 27

6:00 am - 10:42 am

DCA

DEN

6h 42m1 stop

7:35 am - 1:02 pm

DEN

DCA

3h 27mnonstop

$139Multiple Airlines

Tue, Jan 6 - Tue, Jan 13

6:00 am - 10:42 am

DCA

DEN

6h 42m1 stop

11:37 am - 4:59 pm

DEN

DCA

3h 22mnonstop

$140Multiple Airlines

Mon, Jan 12 - Sat, Jan 17

6:00 pm - 8:12 pm

DCA

DEN

4h 12mnonstop

7:40 am - 1:05 pm

DEN

DCA

3h 25mnonstop

$141Frontier

Mon, Feb 23 - Fri, Feb 27

7:05 pm - 9:11 am

IAD

DEN

16h 06m1 stop

12:59 am - 10:21 am

DEN

IAD

7h 22m1 stop

$142Frontier

Mon, Feb 23 - Fri, Feb 27

1:00 pm - 3:16 pm

DCA

DEN

4h 16mnonstop

6:40 am - 12:04 pm

DEN

DCA

3h 24mnonstop

$142Frontier

Sun, Feb 15 - Sat, Feb 21

8:00 am - 10:22 am

DCA

DEN

4h 22mnonstop

11:13 pm - 9:07 am

DEN

DCA

7h 54m1 stop

$143Multiple Airlines

Wed, Feb 11 - Mon, Feb 16

5:42 pm - 9:38 pm

IAD

DEN

29h 56m1 stop

12:05 am - 11:43 am

DEN

IAD

9h 38m1 stop

$144Frontier

Wed, Jan 7 - Tue, Jan 13

Frontier flights from Washington, D.C. to Denver

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

Frontier

Jan 9

IAD6:00 amWashington, D.C. Dulles Intl

8h 21m

1 stop

DEN12:21 pmDenver Intl

Jan 12

DEN12:05 amDenver Intl

9h 38m

1 stop

IAD11:43 amWashington, D.C. Dulles Intl

$134

Find similar

Frontier

Feb 13

DCA8:00 amWashington, D.C. Reagan-National

4h 13m

DEN10:13 amDenver Intl

Feb 14

DEN4:38 pmDenver Intl

3h 21m

DCA9:59 pmWashington, D.C. Reagan-National

$136

Find similar

Frontier

Feb 23

DCA8:00 amWashington, D.C. Reagan-National

4h 22m

DEN10:22 amDenver Intl

Feb 27

DEN4:38 pmDenver Intl

3h 21m

DCA9:59 pmWashington, D.C. Reagan-National

$138

Find similar

JetBlue flights from Washington, D.C. to Denver

Our best JetBlue deals on Washington, D.C. to Denver flight tickets

JetBlue

Dec 17

DCA6:00 amWashington, D.C. Reagan-National

7h 05m

1 stop

DEN11:05 amDenver Intl

Jan 5

DEN10:40 pmDenver Intl

9h 11m

1 stop

DCA9:51 amWashington, D.C. Reagan-National

$293

Find similar

JetBlue

Dec 17

DCA6:00 amWashington, D.C. Reagan-National

7h 05m

1 stop

DEN11:05 amDenver Intl

Jan 7

DEN11:35 amDenver Intl

9h 24m

1 stop

DCA10:59 pmWashington, D.C. Reagan-National

$312

Find similar

JetBlue

Dec 16

DCA7:30 amWashington, D.C. Reagan-National

7h 05m

1 stop

DEN12:35 pmDenver Intl

Jan 5

DEN10:40 pmDenver Intl

9h 11m

1 stop

DCA9:51 amWashington, D.C. Reagan-National

$322

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Fly to

Route

Depart

Return

Price

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Fri 1/9

6:00 am-12:21 pm

1 stop8h 21m

Denver Intl

Mon 1/12

12:05 am-11:43 am

1 stop9h 38m

$134

Washington, D.C.Denver

DCA - DEN

DCADEN

Washington, D.C. Reagan-National

Fri 2/13

8:00 am-10:13 am

Nonstop4h 13m

Denver Intl

Sat 2/14

4:38 pm-9:59 pm

Nonstop3h 21m

$136

Washington, D.C.Denver

DCA - DEN

DCADEN

Washington, D.C. Reagan-National

Mon 2/23

8:00 am-10:22 am

Nonstop4h 22m

Denver Intl

Fri 2/27

4:38 pm-9:59 pm

Nonstop3h 21m

$138

Washington, D.C.Denver

DCA - DEN

DCADEN

Washington, D.C. Reagan-National

Tue 1/6

6:00 am-10:42 am

1 stop6h 42m

Denver Intl

Tue 1/13

7:35 am-1:02 pm

Nonstop3h 27m

$139

Washington, D.C.Denver

DCA - DEN

DCADEN

Washington, D.C. Reagan-National

Mon 1/12

6:00 am-10:42 am

1 stop6h 42m

Denver Intl

Sat 1/17

11:37 am-4:59 pm

Nonstop3h 22m

$140

Washington, D.C.Denver

DCA - DEN

DCADEN

Washington, D.C. Reagan-National

Mon 2/23

6:00 pm-8:12 pm

Nonstop4h 12m

Denver Intl

Fri 2/27

7:40 am-1:05 pm

Nonstop3h 25m

$141

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Mon 2/23

7:05 pm-9:11 am

1 stop16h 06m

Denver Intl

Fri 2/27

12:59 am-10:21 am

1 stop7h 22m

$142

Washington, D.C.Denver

DCA - DEN

DCADEN

Washington, D.C. Reagan-National

Sun 2/15

1:00 pm-3:16 pm

Nonstop4h 16m

Denver Intl

Sat 2/21

6:40 am-12:04 pm

Nonstop3h 24m

$142

Washington, D.C.Denver

DCA - DEN

DCADEN

Washington, D.C. Reagan-National

Wed 2/11

8:00 am-10:22 am

Nonstop4h 22m

Denver Intl

Mon 2/16

11:13 pm-9:07 am

1 stop7h 54m

$143

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Wed 1/7

5:42 pm-9:38 pm

1 stop29h 56m

Denver Intl

Tue 1/13

12:05 am-11:43 am

1 stop9h 38m

$144

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How to get the cheapest flight ticket from Washington, D.C. 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

Delays

Other information

What is the cheapest month to fly to Denver?

The cheapest month to fly to Denver from Washington, D.C. is in August. Flight prices, which tend to average around $242, are often lower during this time because this is during the off-season. If you don’t want to visit Denver in August, then you should wait until January to fly from Washington, D.C., when ticket prices are also cheap, with an average price of $244.

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 $305. 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 $369.

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 $266. Flights in the evening are often more expensive with an average ticket price of $368.

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

Fly from Washington, D.C. Reagan-National to Denver Intl for the best Washington, D.C. - 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. when booking weeks ahead of your departure date. In general, you can expect to find flights to Denver for around $343 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. for as low as $275 on momondo.

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

There are 4 cabin classes available to choose from on Washington, D.C. to Denver 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 Washington, D.C. to Denver flights?

No. A direct flight is the cheapest option for a flight between Washington, D.C. to Denver.

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

As of December 2025, prices for Washington, D.C. to Denver flights are approximately 68% more expensive when compared to flights at the same time last year.

When to book flights from Washington, D.C. to Denver

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. 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. to Denver (WAS to DEN) flight deals and tips

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

Best Price Found	$107
Fastest flight time	3h 40m
Direct flights	Every day
Airports in Denver	1 airport

The best one-way flight to Denver from Washington, D.C. in the past 72 hours is $107. The best round-trip flight deal from Washington, D.C. to Denver found on momondo in the last 72 hours is $128.

The fastest flight from Washington, D.C. to Denver takes 3h 40m

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

There is 1 airport in Denver. From Washington, D.C. there are direct flights to Denver Intl (DEN).

Search flight deals

How far is Washington, D.C. to Denver Intl by plane?
The straight-line distance from Washington, D.C. to Denver Intl is 1487.9 mi. A reasonable flight in good conditions will take 3h 40m.
When did momondo last update prices for flights from Washington, D.C. to Denver Intl Airport?
Prices for flights from Washington, D.C. to Denver Intl Airport refresh daily.
How many operators does momondo search for flights from Washington, D.C. to Denver Intl Airport?
As of December 2025, there are 6 operators available to choose from for flights from Washington, D.C. to Denver Intl Airport.
How old do you have to be to fly from Washington, D.C. to Denver 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 Washington, D.C. to Denver Intl Airport.
What documentation or ID do you need to fly to Denver Intl Airport?
The necessary travel and health documents for your Denver Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Washington, D.C. to Denver?
momondo data reveals that the most frequently booked plane model on the route from Washington, D.C. to Denver is Boeing 737 MAX 8, representing 16.44% of all bookings. The subsequent popular models are Boeing 737-800 Passenger/BBJ2 (winglets) at 12.39%, Airbus A320neo at 11.83%, and Boeing 737-900 at 11.72%.
What is the most popular airline from Washington, D.C. to Denver?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Washington, D.C. to Denver is Frontier (60% of total bookings). The next most popular airlines are United Airlines (26%), Southwest (13%), and American Airlines (1%).

Best airlines flying from Washington, D.C. to Denver

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

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $106	Free Cancellation	Rating 5.8 3,084 reviews	Search Frontier flights
JetBlue	PriceFrom $128	Free Cancellation	Rating 7.2 2,899 reviews	Search JetBlue flights
Delta	PriceFrom $138	Free Cancellation	Rating 7.9 8,005 reviews	Search Delta flights
American Airlines	PriceFrom $166	Free Cancellation	Rating 7.2 11,050 reviews	Search American Airlines flights
Southwest	PriceFrom $178	Free Cancellation	Rating 7.9 4,253 reviews	Search Southwest flights
United Airlines	PriceFrom $215	Free Cancellation	Rating 7.4 9,095 reviews	Search United Airlines flights

Southwest Flights From Washington, D.C. to Denver
The lowest priced Southwest flight from Washington, D.C. to Denver from the last 72 hours was $178. Generally, Southwest has 12 flights on this route every week with an average price of $341. Southwest is rated 7.9/10 by our users.
United Airlines Flights From Washington, D.C. to Denver
The best United Airlines deal for Washington, D.C. to Denver flight tickets found on momondo in the last 72 hours was $215, round-trip. It should be noted that an average United Airlines flight deal for this route in this time was higher, at $390 round-trip. United Airlines operates 53 flights out of Washington, D.C. into Denver in an average week, so prices vary by time and availability. 9,095 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

Longmont

Boulder

Greeley

Lakewood

Thornton

Westminster

Winter Park

Copper Mountain

Silverthorne

Frisco

Centennial

Grand Lake

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Washington, D.C. to Denver for you.

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

Yes. All flights to Denver from Washington, D.C. on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Denver from Washington, D.C..

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

Of course. momondo tracks the price of Washington, D.C. to Denver flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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Cheap flights from Washington, D.C. to Denver from $58

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. to Denver departing on 1/24. 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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How to get the cheapest flight ticket from Washington, D.C. to Denver

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 $305. 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 $369.

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 $266. Flights in the evening are often more expensive with an average ticket price of $368.

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

Fly from Washington, D.C. Reagan-National to Denver Intl for the best Washington, D.C. - 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. to Denver Intl flights?

There are 4 cabin classes available to choose from on Washington, D.C. to Denver 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 Washington, D.C. to Denver flights?

No. A direct flight is the cheapest option for a flight between Washington, D.C. to Denver.

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

As of December 2025, prices for Washington, D.C. to Denver flights are approximately 68% more expensive when compared to flights at the same time last year.

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

United Airlines, Delta, and JetBlue are the most popular carriers operating from Washington, D.C. to Denver Intl

What airlines fly to Denver?

How often are flights from Washington, D.C. to Denver delayed?

Historically, on average around 14% of flights between Washington, D.C. and Denver have experienced a delay on any given week. The average delay length over the past 12 months has been 160 minutes.

What is the most punctual flight time for Washington, D.C. to Denver flights?

Generally, flights departing in the morning tend to experience fewer delays. Flights in the evening have, in the past, seen delays more frequently in comparison.

What day of the week experiences the fewest flight delays on this route?

Saturday is statistically the day of the week which experiences the fewest number of delays on this flight route. Thursday has historically seen more delays on average compared to the rest of the week.

Which airline has the best punctuality record on Washington, D.C. to Denver flights?

According to our data, United Airlines have had the least number of delays on this route over the last 12 months; with about 14% of their flights experiencing any sort of delay.

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

As of December 2025, there are 29 flights per day flying from Washington, D.C. to Denver. The most common time of day flights depart is 4:00PM, with 60% of flights taking off in the afternoon.

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

As of December 2025, 203 flights take off from Washington, D.C. and land in Denver each week. The most common flight departure day for this route is Thu, with 18% of weekly flights taking off on this day.

How long does it take to fly to Denver?

When to book flights from Washington, D.C. to Denver

Cheap Washington, D.C. to Denver (WAS to DEN) flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Airports in Denver

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

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

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

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

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

Best airlines flying from Washington, D.C. to Denver

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

Southwest Flights From Washington, D.C. to Denver

United Airlines Flights From Washington, D.C. 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