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

Frontier, United Airlines, and Delta 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 16% 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 175 minutes.

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 85% 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.

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 16% of their flights experiencing any sort of delay.

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 January 2026, there are 5 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.

$91 Cheap Flights from Washington, D.C. Reagan-National Airport to Denver in 2026

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

As of January 2026, there are 5 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 54% of flights taking off in the afternoon.

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Find the cheapest flights from Washington, D.C. Reagan-National Airport to Denver

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:00 pm - 8:16 pm

DCA

DEN

4h 16mnonstop

11:37 am - 4:59 pm

DEN

DCA

3h 22mnonstop

$100Frontier

Wed, Mar 11 - Mon, Mar 16

8:00 am - 10:22 am

DCA

DEN

4h 22mnonstop

1:39 pm - 6:59 pm

DEN

DCA

3h 20mnonstop

$103Frontier

Wed, Feb 25 - Wed, Feb 25

6:00 pm - 8:16 pm

DCA

DEN

4h 16mnonstop

7:48 am - 1:15 pm

DEN

DCA

3h 27mnonstop

$107Frontier

Sat, Feb 21 - Wed, Feb 25

8:00 am - 10:22 am

DCA

DEN

4h 22mnonstop

4:36 pm - 9:59 pm

DEN

DCA

3h 23mnonstop

$108Frontier

Wed, Mar 25 - Wed, Apr 1

6:00 pm - 8:16 pm

DCA

DEN

4h 16mnonstop

7:48 am - 1:15 pm

DEN

DCA

3h 27mnonstop

$110Frontier

Thu, Feb 26 - Wed, Mar 4

6:00 pm - 8:16 pm

DCA

DEN

4h 16mnonstop

7:48 am - 1:15 pm

DEN

DCA

3h 27mnonstop

$111Frontier

Thu, Feb 26 - Wed, Mar 4

2:00 pm - 4:22 pm

DCA

DEN

4h 22mnonstop

7:35 am - 1:02 pm

DEN

DCA

3h 27mnonstop

$112Frontier

Thu, Mar 5 - Tue, Mar 10

8:00 am - 10:22 am

DCA

DEN

4h 22mnonstop

11:34 am - 4:59 pm

DEN

DCA

3h 25mnonstop

$113Frontier

Mon, Mar 23 - Tue, Apr 7

8:00 am - 10:22 am

DCA

DEN

4h 22mnonstop

11:37 am - 4:59 pm

DEN

DCA

3h 22mnonstop

$116Frontier

Wed, Feb 18 - Sun, Feb 22

8:00 am - 10:22 am

DCA

DEN

4h 22mnonstop

7:48 am - 1:15 pm

DEN

DCA

3h 27mnonstop

$117Frontier

Wed, Feb 18 - Sun, Feb 22

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

Mar 11

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

4h 16m

DEN8:16 pmDenver Intl

Mar 16

DEN11:37 amDenver Intl

3h 22m

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

$100

Frontier

Feb 25

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

4h 22m

DEN10:22 amDenver Intl

Feb 25

DEN1:39 pmDenver Intl

3h 20m

DCA6:59 pmWashington, D.C. Reagan-National

$103

Frontier

Feb 21

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

4h 16m

DEN8:16 pmDenver Intl

Feb 25

DEN7:48 amDenver Intl

3h 27m

DCA1:15 pmWashington, D.C. Reagan-National

$107

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

Wed 3/11

6:00 pm-8:16 pm

Nonstop4h 16m

Denver Intl

Mon 3/16

11:37 am-4:59 pm

Nonstop3h 22m

$100

Washington, D.C.Denver

DCA - DEN

DCADEN

Washington, D.C. Reagan-National

Wed 2/25

8:00 am-10:22 am

Nonstop4h 22m

Denver Intl

Wed 2/25

1:39 pm-6:59 pm

Nonstop3h 20m

$103

Washington, D.C.Denver

DCA - DEN

DCADEN

Washington, D.C. Reagan-National

Sat 2/21

6:00 pm-8:16 pm

Nonstop4h 16m

Denver Intl

Wed 2/25

7:48 am-1:15 pm

Nonstop3h 27m

$107

Washington, D.C.Denver

DCA - DEN

DCADEN

Washington, D.C. Reagan-National

Wed 3/25

8:00 am-10:22 am

Nonstop4h 22m

Denver Intl

Wed 4/1

4:36 pm-9:59 pm

Nonstop3h 23m

$108

Washington, D.C.Denver

DCA - DEN

DCADEN

Washington, D.C. Reagan-National

Thu 2/26

6:00 pm-8:16 pm

Nonstop4h 16m

Denver Intl

Wed 3/4

7:48 am-1:15 pm

Nonstop3h 27m

$110

Washington, D.C.Denver

DCA - DEN

DCADEN

Washington, D.C. Reagan-National

Thu 2/26

6:00 pm-8:16 pm

Nonstop4h 16m

Denver Intl

Wed 3/4

7:48 am-1:15 pm

Nonstop3h 27m

$111

Washington, D.C.Denver

DCA - DEN

DCADEN

Washington, D.C. Reagan-National

Thu 3/5

2:00 pm-4:22 pm

Nonstop4h 22m

Denver Intl

Tue 3/10

7:35 am-1:02 pm

Nonstop3h 27m

$112

Washington, D.C.Denver

DCA - DEN

DCADEN

Washington, D.C. Reagan-National

Mon 3/23

8:00 am-10:22 am

Nonstop4h 22m

Denver Intl

Tue 4/7

11:34 am-4:59 pm

Nonstop3h 25m

$113

Washington, D.C.Denver

DCA - DEN

DCADEN

Washington, D.C. Reagan-National

Wed 2/18

8:00 am-10:22 am

Nonstop4h 22m

Denver Intl

Sun 2/22

11:37 am-4:59 pm

Nonstop3h 22m

$116

Washington, D.C.Denver

DCA - DEN

DCADEN

Washington, D.C. Reagan-National

Wed 2/18

8:00 am-10:22 am

Nonstop4h 22m

Denver Intl

Sun 2/22

7:48 am-1:15 pm

Nonstop3h 27m

$117

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from 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 February. Flight prices, which tend to average around $216, are often lower during this time because this is during the off-season. If you don’t want to visit Denver in February, 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 $307. 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 $268. Flights in the evening are often more expensive with an average ticket price of $371.

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 $261 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 $202 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 January 2026, 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	$111
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 $111. The best round-trip flight deal from Washington, D.C. Reagan-National Airport to Denver found on momondo in the last 72 hours is $164.

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 January 2026, there are 5 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 14.65% of all bookings. The subsequent popular models are Airbus A320neo at 13.22%, Boeing 737-900 at 12.59%, and Boeing 737-800 Passenger/BBJ2 (winglets) at 11.17%.
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 (87% of total bookings). The next most popular airlines are United Airlines (6%), 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 $99	Free Cancellation	Rating 5.7 3,054 reviews	Search Frontier flights
United Airlines	PriceFrom $188	Free Cancellation	Rating 7.4 9,219 reviews	Search United Airlines flights
American Airlines	PriceFrom $216	Free Cancellation	Rating 7.2 11,213 reviews	Search American Airlines flights
Delta	PriceFrom $236	Free Cancellation	Rating 7.9 8,130 reviews	Search Delta flights
Southwest	PriceFrom $236	Free Cancellation	Rating 8.0 4,267 reviews	Search Southwest flights

United Airlines Flights From Washington, D.C. Reagan-National Airport to Denver
Across 13 United Airlines flights from Washington, D.C. Reagan-National Airport to Denver this week, the average price was $416, with the best United Airlines deals starting from $188 round-trip. 9,219 users have rated United Airlines on momondo, with an average score of 7.4/10.
Frontier Flights From Washington, D.C. Reagan-National Airport to Denver
Across 3,054 Frontier reviews on momondo, the average score is 5.7/10. Frontier flies from Washington, D.C. Reagan-National Airport to Denver about 17 times each week, with ticket deals ranging from $99 to $247. Price data is based on momondo searches in the last 72 hours.

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Cripple Creek

Boulder

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Greeley

Lakewood

Westminster

Thornton

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Copper Mountain

Winter Park

Centennial

Englewood

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.

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Cheap flights from Washington, D.C. Reagan-National Airport to Denver from $93

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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

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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 $307. 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 $268. Flights in the evening are often more expensive with an average ticket price of $371.

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 January 2026, 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?

Frontier, United Airlines, and Delta 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 16% 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 175 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 16% 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 January 2026, there are 5 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 54% 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 37 per week as of January 2026. The most frequent departure day is Mon, with 16% 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

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

Frontier 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

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