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. Reagan-National Airport according to our data. Frontier is the first choice among our users, with 84% 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.

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

According to our data, Frontier 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.

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

United Airlines, Delta, and Frontier are the most popular carriers operating from Washington, D.C. Reagan-National to Denver Intl

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

Historically, on average around 15% 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 173 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.

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

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

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

As of December 2025, there are 6 operators available to choose from for flights from Washington, D.C. Reagan-National 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.

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

Q: How many flights depart from Washington, D.C. Reagan-National Airport to Denver on average per week?

The number of flights available between Washington, D.C. Reagan-National Airport and Denver is 45 per week as of December 2025. The most frequent departure day is Mon, with 18% of weekly flights leaving on this day.

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Cheap round-trip flights

Enter your travel dates to find the best prices.

8:00 am - 10:22 am

DCA

DEN

4h 22mnonstop

4:38 pm - 9:59 pm

DEN

DCA

3h 21mnonstop

$131Frontier

Fri, Feb 27 - Mon, Mar 2

2:00 pm - 4:15 pm

DCA

DEN

4h 15mnonstop

4:38 pm - 9:59 pm

DEN

DCA

3h 21mnonstop

$133Frontier

Tue, Jan 6 - Mon, Jan 12

6:00 pm - 8:12 pm

DCA

DEN

4h 12mnonstop

7:35 am - 1:02 pm

DEN

DCA

3h 27mnonstop

$134Frontier

Wed, Jan 7 - Tue, Jan 13

8:01 am - 10:14 am

DCA

DEN

4h 13mnonstop

4:38 pm - 9:59 pm

DEN

DCA

3h 21mnonstop

$136Frontier

Fri, Jan 9 - Fri, Jan 9

2:00 pm - 4:15 pm

DCA

DEN

4h 15mnonstop

7:35 am - 1:01 pm

DEN

DCA

3h 26mnonstop

$138Frontier

Fri, Jan 9 - Sat, Jan 10

6:00 am - 10:42 am

DCA

DEN

6h 42m1 stop

4:38 pm - 9:59 pm

DEN

DCA

3h 21mnonstop

$139Multiple Airlines

Wed, Jan 14 - Sat, Jan 17

7:00 am - 12:45 pm

DCA

DEN

7h 45m1 stop

7:35 am - 1:02 pm

DEN

DCA

3h 27mnonstop

$140Multiple Airlines

Sun, Jan 11 - Tue, Jan 13

6:00 am - 10:42 am

DCA

DEN

6h 42m1 stop

7:48 am - 1:15 pm

DEN

DCA

3h 27mnonstop

$141Multiple Airlines

Wed, Feb 4 - Wed, Feb 11

2:00 pm - 4:22 pm

DCA

DEN

4h 22mnonstop

11:37 am - 4:59 pm

DEN

DCA

3h 22mnonstop

$142Frontier

Thu, Jan 15 - Sun, Jan 18

8:00 am - 10:22 am

DCA

DEN

4h 22mnonstop

7:48 am - 1:15 pm

DEN

DCA

3h 27mnonstop

$143Frontier

Thu, Feb 12 - Wed, Feb 18

Frontier flights from Washington, D.C. Reagan-National Airport to Denver

Our best Frontier deals on Washington, D.C. Reagan-National Airport to Denver flight tickets

Frontier

Feb 27

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

4h 22m

DEN10:22 amDenver Intl

Mar 2

DEN4:38 pmDenver Intl

3h 21m

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

$131

Find similar

Frontier

Feb 23

DCA2:00 pmWashington, D.C. Reagan-National

4h 22m

DEN4:22 pmDenver Intl

Feb 27

DEN11:37 amDenver Intl

3h 22m

DCA4:59 pmWashington, D.C. Reagan-National

$133

Find similar

Frontier

Jan 13

DCA2:00 pmWashington, D.C. Reagan-National

4h 22m

DEN4:22 pmDenver Intl

Jan 20

DEN4:38 pmDenver Intl

3h 21m

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

$134

Find similar

JetBlue flights from Washington, D.C. Reagan-National Airport to Denver

Our best JetBlue deals on Washington, D.C. Reagan-National Airport to Denver flight tickets

JetBlue

Jan 5

DCA9:10 amWashington, D.C. Reagan-National

9h 42m

1 stop

DEN4:52 pmDenver Intl

Jan 14

DEN11:35 amDenver Intl

9h 24m

1 stop

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

$279

Find similar

JetBlue

Jan 3

DCA2:00 pmWashington, D.C. Reagan-National

9h 37m

1 stop

DEN9:37 pmDenver Intl

Jan 7

DEN11:35 amDenver Intl

9h 24m

1 stop

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

$285

Find similar

JetBlue

Jan 4

DCA6:15 amWashington, D.C. Reagan-National

18h 44m

1 stop

DEN10:59 pmDenver Intl

Jan 12

DEN11:35 amDenver Intl

9h 24m

1 stop

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

$297

Find similar

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Denver

DCA - DEN

DCADEN

Washington, D.C. Reagan-National

Fri 2/27

8:00 am-10:22 am

Nonstop4h 22m

Denver Intl

Mon 3/2

4:38 pm-9:59 pm

Nonstop3h 21m

$131

Washington, D.C.Denver

DCA - DEN

DCADEN

Washington, D.C. Reagan-National

Tue 1/6

2:00 pm-4:15 pm

Nonstop4h 15m

Denver Intl

Mon 1/12

4:38 pm-9:59 pm

Nonstop3h 21m

$133

Washington, D.C.Denver

DCA - DEN

DCADEN

Washington, D.C. Reagan-National

Wed 1/7

6:00 pm-8:12 pm

Nonstop4h 12m

Denver Intl

Tue 1/13

7:35 am-1:02 pm

Nonstop3h 27m

$134

Washington, D.C.Denver

DCA - DEN

DCADEN

Washington, D.C. Reagan-National

Fri 1/9

8:01 am-10:14 am

Nonstop4h 13m

Denver Intl

Fri 1/9

4:38 pm-9:59 pm

Nonstop3h 21m

$136

Washington, D.C.Denver

DCA - DEN

DCADEN

Washington, D.C. Reagan-National

Fri 1/9

2:00 pm-4:15 pm

Nonstop4h 15m

Denver Intl

Sat 1/10

7:35 am-1:01 pm

Nonstop3h 26m

$138

Washington, D.C.Denver

DCA - DEN

DCADEN

Washington, D.C. Reagan-National

Wed 1/14

6:00 am-10:42 am

1 stop6h 42m

Denver Intl

Sat 1/17

4:38 pm-9:59 pm

Nonstop3h 21m

$139

Washington, D.C.Denver

DCA - DEN

DCADEN

Washington, D.C. Reagan-National

Sun 1/11

7:00 am-12:45 pm

1 stop7h 45m

Denver Intl

Tue 1/13

7:35 am-1:02 pm

Nonstop3h 27m

$140

Washington, D.C.Denver

DCA - DEN

DCADEN

Washington, D.C. Reagan-National

Wed 2/4

6:00 am-10:42 am

1 stop6h 42m

Denver Intl

Wed 2/11

7:48 am-1:15 pm

Nonstop3h 27m

$141

Washington, D.C.Denver

DCA - DEN

DCADEN

Washington, D.C. Reagan-National

Thu 1/15

2:00 pm-4:22 pm

Nonstop4h 22m

Denver Intl

Sun 1/18

11:37 am-4:59 pm

Nonstop3h 22m

$142

Washington, D.C.Denver

DCA - DEN

DCADEN

Washington, D.C. Reagan-National

Thu 2/12

8:00 am-10:22 am

Nonstop4h 22m

Denver Intl

Wed 2/18

7:48 am-1:15 pm

Nonstop3h 27m

$143

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Showing 1-10 of 20 resultsSorted by cheapest first

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

Delays

Other information

What is the cheapest month to fly to Denver?

The cheapest month to fly to Denver from Washington, D.C. Reagan-National Airport is in January. Flight prices, which tend to average around $209, are often lower during this time because this is during the off-season. If you don’t want to visit Denver in January, then you should wait until September to fly from Washington, D.C. Reagan-National Airport, when ticket prices are also cheap, with an average price of $219.

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 $303. 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 $367.

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 $265. Flights in the evening are often more expensive with an average ticket price of $367.

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

Fly from Washington, D.C. Reagan-National to Denver Intl for the best Washington, D.C. Reagan-National - 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. Reagan-National Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Denver for around $262 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. Reagan-National Airport for as low as $210 on momondo.

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

There are 4 cabin classes available to choose from on Washington, D.C. Reagan-National 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. Reagan-National Airport to Denver flight prices changed over time?

As of December 2025, prices for Washington, D.C. Reagan-National Airport to Denver flights are approximately 116% more expensive when compared to flights at the same time last year.

When to book flights from Washington, D.C. Reagan-National Airport to Denver

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

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

Best Price Found	$135
Fastest flight time	4h 00m
Direct flights	Every day
Airports in Denver	1 airport

The best one-way flight to Denver from Washington, D.C. Reagan-National Airport in the past 72 hours is $135. The best round-trip flight deal from Washington, D.C. Reagan-National Airport to Denver found on momondo in the last 72 hours is $183.

The fastest flight from Washington, D.C. Reagan-National Airport to Denver takes 4h 00m

Direct flights go from Washington, D.C. Reagan-National Airport to Denver every day.

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

Search flight deals

How far is Washington, D.C. Reagan-National to Denver Intl by plane?
There are 1488.5 mi between Washington, D.C. Reagan-National and Denver Intl. Typically, this will take 4h 00m by plane in normal conditions.
When did momondo last update prices for flights from Washington, D.C. Reagan-National Airport to Denver Intl Airport?
Prices for flights from Washington, D.C. Reagan-National Airport to Denver Intl Airport were last updated today.
How many operators does momondo search for flights from Washington, D.C. Reagan-National Airport to Denver Intl Airport?
As of December 2025, there are 6 operators available to choose from for flights from Washington, D.C. Reagan-National Airport to Denver Intl Airport.
How old do you have to be to fly from Washington, D.C. Reagan-National 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. Reagan-National 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. Reagan-National Airport to Denver?
momondo data reveals that the most frequently booked plane model on the route from Washington, D.C. Reagan-National Airport to Denver is Boeing 737 MAX 8, representing 14.21% of all bookings. The subsequent popular models are Airbus A320neo at 13.41%, Boeing 737-900 at 11.68%, and Boeing 737-800 Passenger/BBJ2 (winglets) at 11.04%.
What is the most popular airline from Washington, D.C. Reagan-National Airport to Denver?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Washington, D.C. Reagan-National Airport to Denver is Frontier (86% of total bookings). The next most popular airlines are United Airlines (7%), Southwest (4%), and American Airlines (2%).

Best airlines flying from Washington, D.C. Reagan-National Airport to Denver

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

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $112	Free Cancellation	Rating 5.8 3,079 reviews	Search Frontier flights
JetBlue	PriceFrom $128	Free Cancellation	Rating 7.2 2,895 reviews	Search JetBlue flights
American Airlines	PriceFrom $216	Free Cancellation	Rating 7.2 11,051 reviews	Search American Airlines flights
United Airlines	PriceFrom $218	Free Cancellation	Rating 7.4 9,101 reviews	Search United Airlines flights
Southwest	PriceFrom $236	Free Cancellation	Rating 8.0 4,254 reviews	Search Southwest flights
Delta	PriceFrom $236	Free Cancellation	Rating 7.9 8,017 reviews	Search Delta flights

Southwest Flights From Washington, D.C. Reagan-National Airport to Denver
Across 7 Southwest flights from Washington, D.C. Reagan-National Airport to Denver this week, the average price was $363, with the best Southwest deals starting from $236 round-trip. 4,254 users have rated Southwest on momondo, with an average score of 8.0/10.
United Airlines Flights From Washington, D.C. Reagan-National Airport to Denver
Across 9,102 United Airlines reviews on momondo, the average score is 7.4/10. United Airlines flies from Washington, D.C. Reagan-National Airport to Denver about 13 times each week, with ticket deals ranging from $218 to $413. Price data is based on momondo searches in the last 72 hours.

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?

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 offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight 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?

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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Frontier flights from Washington, D.C. Reagan-National Airport to Denver

Our best Frontier deals on Washington, D.C. Reagan-National Airport to Denver flight tickets

JetBlue flights from Washington, D.C. Reagan-National Airport to Denver

Our best JetBlue deals on Washington, D.C. Reagan-National Airport to Denver flight tickets

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

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How to get the cheapest flight ticket from Washington, D.C. Reagan-National Airport 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 $303. 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 $367.

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 $265. Flights in the evening are often more expensive with an average ticket price of $367.

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

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

There are 4 cabin classes available to choose from on Washington, D.C. Reagan-National 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. Reagan-National Airport to Denver flight prices changed over time?

As of December 2025, prices for Washington, D.C. Reagan-National Airport to Denver flights are approximately 116% more expensive when compared to flights at the same time last year.

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

United Airlines, Delta, and Frontier are the most popular carriers operating from Washington, D.C. Reagan-National to Denver Intl

What airlines fly to Denver?

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

Historically, on average around 15% 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 173 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, Frontier 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. Reagan-National Airport to Denver on average per day?

As of December 2025, there are 6 flights per day flying from Washington, D.C. Reagan-National Airport to Denver. The most common time of day flights depart is 4:00PM, with 50% of flights taking off in the afternoon.

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

The number of flights available between Washington, D.C. Reagan-National Airport and Denver is 45 per week as of December 2025. The most frequent departure day is Mon, with 18% of weekly flights leaving on this day.

When to book flights from Washington, D.C. Reagan-National Airport to Denver

Cheap Washington, D.C. Reagan-National Airport to Denver (DCA to DEN) flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Airports in Denver

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

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

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

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

What is the most popular airline from Washington, D.C. Reagan-National Airport to Denver?

Best airlines flying from Washington, D.C. Reagan-National Airport to Denver

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

Southwest Flights From Washington, D.C. Reagan-National Airport to Denver

United Airlines Flights From Washington, D.C. Reagan-National 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