What is the cheapest airline that flies from Denver Intl to District of Columbia?

Southwest and United Airlines are the most popular carriers operating from Denver Intl to District of Columbia

How many flights depart from Denver to District of Columbia on average per week?

As of November 2026, 149 flights take off from Denver and land in District of Columbia each week. The most common flight departure day for this route is Wed, with 18% of weekly flights taking off on this day.

How many flights depart from Denver to District of Columbia on average per day?

The number of flights available between Denver and District of Columbia is 21 per day as of November 2026. The most frequent departure time is 7:00AM, with 45% of daily flights leaving at noon.

What airlines fly to District of Columbia?

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

When did momondo last update prices for flights from Denver Intl Airport to District of Columbia?

Prices for flights from Denver Intl Airport to District of Columbia are updated daily.

How many operators does momondo search for flights from Denver Intl Airport to District of Columbia?

There are 5 operators available for flights from Denver Intl Airport to District of Columbia as of November 2026.

How old do you have to be to fly from Denver Intl Airport to District of Columbia?

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 Denver Intl Airport to District of Columbia.

What documentation or ID do you need to fly to District of Columbia?

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

$148 Cheap Flights from Denver to District of Columbia in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Denver to District of Columbia

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

10:29 pm - 3:13 pmDEN Denver Intl-IAD Washington, D.C. Dulles Intl

14h 44m2 stops Los Angeles Atlanta Hartsfield-Jackson

10:59 pm - 6:29 amIAD Washington, D.C. Dulles Intl-DEN Denver Intl

9h 30m1 stop Atlanta Hartsfield-Jackson

$297Frontier

Wed, Dec 16 - Wed, Dec 23

6:25 am - 7:50 pmDEN Denver Intl-IAD Washington, D.C. Dulles Intl

11h 25m1 stop Dallas/Fort Worth

10:28 pm - 9:24 amIAD Washington, D.C. Dulles Intl-DEN Denver Intl

12h 56m1 stop Orlando

$297Frontier

Fri, Dec 18 - Mon, Jan 4

10:34 am - 7:33 pmDEN Denver Intl-IAD Washington, D.C. Dulles Intl

6h 59m1 stop Dallas/Fort Worth

5:30 pm - 10:44 amIAD Washington, D.C. Dulles Intl-DEN Denver Intl

19h 14m1 stop Seattle/Tacoma Intl

$313Multiple Airlines

Mon, Jan 25 - Wed, Jan 27

9:17 pm - 11:41 amDEN Denver Intl-IAD Washington, D.C. Dulles Intl

12h 24m1 stop Minneapolis St Paul

10:33 pm - 8:17 pmIAD Washington, D.C. Dulles Intl-DEN Denver Intl

23h 44m2 stops Atlanta Hartsfield-Jackson Austin Bergstrom

$319Multiple Airlines

Mon, Nov 23 - Wed, Dec 2

9:15 am - 5:02 pmDEN Denver Intl-DCA Washington, D.C. Reagan-National

5h 47m1 stop Chicago O'Hare Intl

5:26 pm - 9:58 pmDCA Washington, D.C. Reagan-National-DEN Denver Intl

6h 32m1 stop Charlotte Douglas

$354American Airlines

Thu, Nov 26 - Wed, Dec 2

12:22 pm - 8:00 pmDEN Denver Intl-DCA Washington, D.C. Reagan-National

5h 38m1 stop Chicago O'Hare Intl

5:06 pm - 9:24 pmDCA Washington, D.C. Reagan-National-DEN Denver Intl

6h 18m1 stop Chicago O'Hare Intl

$355American Airlines

Mon, Dec 21 - Fri, Jan 1

6:50 am - 1:55 pmDEN Denver Intl-DCA Washington, D.C. Reagan-National

5h 05m1 stop Chicago Midway

4:55 pm - 9:15 pmDCA Washington, D.C. Reagan-National-DEN Denver Intl

6h 20m1 stop Nashville Intl

$374Southwest

Tue, Feb 16 - Tue, Feb 16

11:20 am - 5:55 pmDEN Denver Intl-DCA Washington, D.C. Reagan-National

4h 35m1 stop Omaha Eppley Airfield

6:10 am - 10:00 amDCA Washington, D.C. Reagan-National-DEN Denver Intl

5h 50m1 stop Chicago Midway

$374Southwest

Tue, Dec 8 - Thu, Dec 10

12:00 pm - 5:19 pmDEN Denver Intl-IAD Washington, D.C. Dulles Intl

3h 19mnonstop

5:30 pm - 7:39 pmIAD Washington, D.C. Dulles Intl-DEN Denver Intl

4h 09mnonstop

$379United Airlines

Wed, Dec 9 - Mon, Dec 14

10:20 am - 3:46 pmDEN Denver Intl-IAD Washington, D.C. Dulles Intl

3h 26mnonstop

5:28 pm - 7:40 pmIAD Washington, D.C. Dulles Intl-DEN Denver Intl

4h 12mnonstop

$379United Airlines

Thu, Jan 28 - Sun, Jan 31

Cheap last minute flights

Enter your travel dates to find the best prices.

7:10 pm - 10:21 amDEN Denver Intl-IAD Washington, D.C. Dulles Intl

13h 11m1 stop Orlando

7:25 pm - 8:24 amIAD Washington, D.C. Dulles Intl-DEN Denver Intl

14h 59m1 stop Tampa

$298Frontier

Wed, Nov 11 - Wed, Nov 18

7:10 pm - 10:21 amDEN Denver Intl-IAD Washington, D.C. Dulles Intl

13h 11m1 stop Orlando

12:31 pm - 9:34 pmIAD Washington, D.C. Dulles Intl-DEN Denver Intl

11h 03m1 stop Dallas/Fort Worth

$298Frontier

Wed, Nov 11 - Tue, Nov 17

6:45 am - 12:09 pmDEN Denver Intl-DCA Washington, D.C. Reagan-National

3h 24mnonstop

5:45 pm - 1:22 pmDCA Washington, D.C. Reagan-National-DEN Denver Intl

21h 37m1 stop Boston Logan Intl

$400Multiple Airlines

Mon, Nov 9 - Tue, Dec 8

7:15 am - 3:59 pmDEN Denver Intl-DCA Washington, D.C. Reagan-National

6h 44m1 stop Charlotte Douglas

5:26 pm - 9:58 pmDCA Washington, D.C. Reagan-National-DEN Denver Intl

6h 32m1 stop Charlotte Douglas

$462American Airlines

Mon, Nov 9 - Tue, Dec 8

11:59 pm - 5:19 amDEN Denver Intl-IAD Washington, D.C. Dulles Intl

3h 20mnonstop

4:21 pm - 6:25 pmIAD Washington, D.C. Dulles Intl-DEN Denver Intl

4h 04mnonstop

$464United Airlines

Mon, Nov 9 - Tue, Dec 8

4:35 pm - 9:50 pmDEN Denver Intl-DCA Washington, D.C. Reagan-National

3h 15mnonstop

5:20 pm - 2:27 pmDCA Washington, D.C. Reagan-National-DEN Denver Intl

23h 07m1 stop Portland

$465Multiple Airlines

Thu, Nov 12 - Tue, Nov 17

2:10 pm - 10:55 pmDEN Denver Intl-DCA Washington, D.C. Reagan-National

6h 45m2 stops Knoxville McGhee Tyson Nashville Intl

1:00 pm - 6:50 pmDCA Washington, D.C. Reagan-National-DEN Denver Intl

7h 50m1 stop Chicago Midway

$479Southwest

Mon, Nov 9 - Tue, Dec 8

7:40 am - 12:55 pmDEN Denver Intl-IAD Washington, D.C. Dulles Intl

3h 15mnonstop

5:20 pm - 7:30 pmIAD Washington, D.C. Dulles Intl-DEN Denver Intl

4h 10mnonstop

$494United Airlines

Wed, Nov 11 - Mon, Nov 16

11:20 am - 6:00 pmDEN Denver Intl-DCA Washington, D.C. Reagan-National

4h 40m1 stop Omaha Eppley Airfield

4:00 pm - 7:15 pmDCA Washington, D.C. Reagan-National-DEN Denver Intl

5h 15m1 stop Omaha Eppley Airfield

$505Southwest

Wed, Nov 11 - Tue, Nov 17

6:50 am - 4:06 pmDEN Denver Intl-DCA Washington, D.C. Reagan-National

7h 16m1 stop Chicago O'Hare Intl

5:00 am - 9:47 amDCA Washington, D.C. Reagan-National-DEN Denver Intl

6h 47m1 stop Dallas/Fort Worth

$514American Airlines

Thu, Nov 12 - Sun, Nov 15

Cheap direct flights

Enter your travel dates to find the best prices.

7:00 am - 12:25 pmDEN Denver Intl-DCA Washington, D.C. Reagan-National

3h 25mnonstop

7:40 am - 9:56 amDCA Washington, D.C. Reagan-National-DEN Denver Intl

4h 16mnonstop

$298Frontier

Wed, Dec 23 - Fri, Jan 1

7:00 am - 12:25 pmDEN Denver Intl-DCA Washington, D.C. Reagan-National

3h 25mnonstop

7:40 am - 9:56 amDCA Washington, D.C. Reagan-National-DEN Denver Intl

4h 16mnonstop

$299Frontier

Wed, Dec 23 - Sun, Jan 3

7:30 am - 12:55 pmDEN Denver Intl-DCA Washington, D.C. Reagan-National

3h 25mnonstop

6:00 pm - 8:20 pmDCA Washington, D.C. Reagan-National-DEN Denver Intl

4h 20mnonstop

$300Frontier

Sun, Dec 6 - Sun, Dec 6

7:30 am - 12:55 pmDEN Denver Intl-DCA Washington, D.C. Reagan-National

3h 25mnonstop

6:00 pm - 8:20 pmDCA Washington, D.C. Reagan-National-DEN Denver Intl

4h 20mnonstop

$301Frontier

Sat, Dec 5 - Sat, Dec 12

7:10 am - 12:35 pmDEN Denver Intl-DCA Washington, D.C. Reagan-National

3h 25mnonstop

6:00 pm - 8:14 pmDCA Washington, D.C. Reagan-National-DEN Denver Intl

4h 14mnonstop

$302Frontier

Fri, Jan 15 - Tue, Jan 19

4:40 pm - 9:59 pmDEN Denver Intl-DCA Washington, D.C. Reagan-National

3h 19mnonstop

7:40 am - 9:56 amDCA Washington, D.C. Reagan-National-DEN Denver Intl

4h 16mnonstop

$302Frontier

Fri, Dec 18 - Thu, Dec 24

7:41 am - 12:59 pmDEN Denver Intl-DCA Washington, D.C. Reagan-National

3h 18mnonstop

7:00 am - 9:16 amDCA Washington, D.C. Reagan-National-DEN Denver Intl

4h 16mnonstop

$302Frontier

Tue, Nov 24 - Fri, Nov 27

7:10 am - 12:35 pmDEN Denver Intl-DCA Washington, D.C. Reagan-National

3h 25mnonstop

7:00 am - 9:20 amDCA Washington, D.C. Reagan-National-DEN Denver Intl

4h 20mnonstop

$302Frontier

Fri, Jan 15 - Mon, Jan 18

12:00 pm - 5:19 pmDEN Denver Intl-IAD Washington, D.C. Dulles Intl

3h 19mnonstop

5:30 pm - 7:39 pmIAD Washington, D.C. Dulles Intl-DEN Denver Intl

4h 09mnonstop

$379United Airlines

Wed, Dec 9 - Mon, Dec 14

10:20 am - 3:46 pmDEN Denver Intl-IAD Washington, D.C. Dulles Intl

3h 26mnonstop

5:28 pm - 7:40 pmIAD Washington, D.C. Dulles Intl-DEN Denver Intl

4h 12mnonstop

$379United Airlines

Thu, Jan 28 - Sun, Jan 31

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Frontier flights from Denver to District of Columbia

Our best Frontier deals on Denver to District of Columbia flight tickets

Frontier

Dec 16

DEN10:29 pmDenver Intl

14h 44m

2 stops

IAD3:13 pmWashington, D.C. Dulles Intl

Dec 23

IAD10:59 pmWashington, D.C. Dulles Intl

9h 30m

1 stop

DEN6:29 amDenver Intl

$297

Frontier

Nov 18

DEN7:10 pmDenver Intl

13h 11m

1 stop

IAD10:21 amWashington, D.C. Dulles Intl

Nov 22

IAD9:56 pmWashington, D.C. Dulles Intl

12h 54m

1 stop

DEN8:50 amDenver Intl

$298

Frontier

Dec 17

DEN6:00 amDenver Intl

7h 13m

1 stop

IAD3:13 pmWashington, D.C. Dulles Intl

Dec 29

IAD10:59 pmWashington, D.C. Dulles Intl

9h 30m

1 stop

DEN6:29 amDenver Intl

$299

momondo Fare Finder

Use the filters below to find and compare flights from Denver to District of Columbia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DenverWashington, D.C.

DEN Denver Intl - IAD Washington, D.C. Dulles Intl

DENIAD

Denver Intl

Wed 12/16

10:29 pm-3:13 pm

2 stops14h 44m

Washington, D.C. Dulles Intl

Wed 12/23

10:59 pm-6:29 am

1 stop9h 30m

$297

DenverWashington, D.C.

DEN Denver Intl - IAD Washington, D.C. Dulles Intl

DENIAD

Denver Intl

Fri 12/18

6:25 am-7:50 pm

1 stop11h 25m

Washington, D.C. Dulles Intl

Mon 1/4

10:28 pm-9:24 am

1 stop12h 56m

$297

DenverWashington, D.C.

DEN Denver Intl - IAD Washington, D.C. Dulles Intl

DENIAD

Denver Intl

Mon 1/25

10:34 am-7:33 pm

1 stop6h 59m

Washington, D.C. Dulles Intl

Wed 1/27

5:30 pm-10:44 am

1 stop19h 14m

$313

DenverWashington, D.C.

DEN Denver Intl - IAD Washington, D.C. Dulles Intl

DENIAD

Denver Intl

Mon 11/23

9:17 pm-11:41 am

1 stop12h 24m

Washington, D.C. Dulles Intl

Wed 12/2

10:33 pm-8:17 pm

2 stops23h 44m

$319

DenverWashington, D.C.

DEN Denver Intl - DCA Washington, D.C. Reagan-National

DENDCA

Denver Intl

Thu 11/26

9:15 am-5:02 pm

1 stop5h 47m

Washington, D.C. Reagan-National

Wed 12/2

5:26 pm-9:58 pm

1 stop6h 32m

$354

DenverWashington, D.C.

DEN Denver Intl - DCA Washington, D.C. Reagan-National

DENDCA

Denver Intl

Mon 12/21

12:22 pm-8:00 pm

1 stop5h 38m

Washington, D.C. Reagan-National

Fri 1/1

5:06 pm-9:24 pm

1 stop6h 18m

$355

DenverWashington, D.C.

DEN Denver Intl - DCA Washington, D.C. Reagan-National

DENDCA

Denver Intl

Tue 2/16

6:50 am-1:55 pm

1 stop5h 05m

Washington, D.C. Reagan-National

Tue 2/16

4:55 pm-9:15 pm

1 stop6h 20m

$374

DenverWashington, D.C.

DEN Denver Intl - DCA Washington, D.C. Reagan-National

DENDCA

Denver Intl

Tue 12/8

11:20 am-5:55 pm

1 stop4h 35m

Washington, D.C. Reagan-National

Thu 12/10

6:10 am-10:00 am

1 stop5h 50m

$374

Quickest round-trip

DenverWashington, D.C.

DEN Denver Intl - IAD Washington, D.C. Dulles Intl

DENIAD

Denver Intl

Wed 12/9

12:00 pm-5:19 pm

Nonstop3h 19m

Washington, D.C. Dulles Intl

Mon 12/14

5:30 pm-7:39 pm

Nonstop4h 09m

$379

DenverWashington, D.C.

DEN Denver Intl - IAD Washington, D.C. Dulles Intl

DENIAD

Denver Intl

Thu 1/28

10:20 am-3:46 pm

Nonstop3h 26m

Washington, D.C. Dulles Intl

Sun 1/31

5:28 pm-7:40 pm

Nonstop4h 12m

$379

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 Denver to District of Columbia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to District of Columbia?

In general, February is the cheapest month to fly from Denver to District of Columbia. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $241. If you don’t want to visit District of Columbia in February, then you should wait until January to fly from Denver, when ticket prices are also cheap, with an average price of $258.

What is the cheapest day to depart on your flight to District of Columbia?

The cheapest day to depart on your flight to District of Columbia is on a Thursday when prices can be found for as low as $397. This is often the case because there is less demand to fly during this day of the week. On the other hand, Monday is the most expensive day to depart from Denver because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $616.

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

Flying to District of Columbia from Denver in the morning is the least expensive time of day to depart. momondo users have found prices as low as $442 when looking at flights departing in the morning. Flights to District of Columbia are more costly in the evening, with an average ticket price of $871. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Denver Intl to District of Columbia flight route?

Fly from Denver Intl to Washington, D.C. Reagan-National for the best Denver Intl - District of Columbia flight prices

How far in advance should I book a flight from Denver to District of Columbia?

You are more likely to see cheaper flights to District of Columbia from Denver when booking weeks ahead of your departure date. In general, you can expect to find flights to District of Columbia for around $462 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to District of Columbia from Denver for as low as $357 on momondo.

What cabin class options are available on Denver to District of Columbia flights?

There are 4 cabin classes available to choose from on Denver to District of Columbia 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 Denver to District of Columbia flights?

No. A direct flight is the cheapest option for a flight between Denver to District of Columbia.

Cheap Denver to District of Columbia flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Denver to District of Columbia

Best Price Found	$148
Fastest flight time	3h 14m
Direct flights	Every day
Airports in District of Columbia	2 airports

The best one-way flight to District of Columbia from Denver in the past 72 hours is $148. The best round-trip flight deal from Denver to District of Columbia found on momondo in the last 72 hours is $297.

The fastest flight from Denver to District of Columbia takes 3h 14m

Direct flights go from Denver to District of Columbia every day.

There are 2 airports in District of Columbia. From Denver there are direct flights to Washington, D.C. Reagan-National (DCA), Washington, D.C. Dulles Intl (IAD).

Search flight deals

Frequently asked questions about flying from Denver to District of Columbia

When did momondo last update prices for flights from Denver Intl Airport to District of Columbia?
Prices for flights from Denver Intl Airport to District of Columbia are updated daily.
How many operators does momondo search for flights from Denver Intl Airport to District of Columbia?
There are 5 operators available for flights from Denver Intl Airport to District of Columbia as of November 2026.
How old do you have to be to fly from Denver Intl Airport to District of Columbia?
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 Denver Intl Airport to District of Columbia.
What documentation or ID do you need to fly to District of Columbia?
The travel and health documents you'll need for your trip to District of Columbia 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 District of Columbia. 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 Denver to District of Columbia?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Denver to District of Columbia is Airbus A320neo (18.68% of total bookings). The next most popular plane models are Airbus A321neo (16.26%), Boeing 737-900 (12.65%), and Boeing 757-300 (12.48%).

Best airlines flying from Denver to District of Columbia

Compare and see reviews for airlines that fly from Denver to District of Columbia with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $108	Free Cancellation	Rating 7.8 8,701 reviews	Search Delta flights
Frontier	PriceFrom $127	Free Cancellation	Rating 5.5 2,512 reviews	Search Frontier flights
Southwest	PriceFrom $216	Free Cancellation	Rating 8.0 4,212 reviews	Search Southwest flights
American Airlines	PriceFrom $255	Free Cancellation	Rating 7.0 12,233 reviews	Search American Airlines flights
United Airlines	PriceFrom $255	Free Cancellation	Rating 7.3 10,470 reviews	Search United Airlines flights
JetBlue	PriceFrom $280	Free Cancellation	Rating 7.1 3,064 reviews	Search JetBlue flights

Why use momondo?

Why should I use momondo to find a flight deal from Denver to District of Columbia?

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

Can I find flights from Denver to District of Columbia with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to District of Columbia from Denver with this policy.

How can momondo help me find flights from Denver to District of Columbia?

Once you have performed a search for Denver to District of Columbia flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Denver to District of Columbia right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Denver to District of Columbia flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.