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Cheap flights from Denver to Washington, D.C. from $164

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Denver to Washington, D.C. departing on 9/28. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Denver to Washington, D.C.

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
10:30 am - 12:28 am
DEN
-
IAD
11h 58m
1 stop
Frontier Logo
1:38 pm - 12:12 am
IAD
-
DEN
12h 34m
1 stop
$307Frontier
Fri, Oct 23 - Mon, Oct 26
Frontier Logo
9:58 am - 10:55 pm
DEN
-
IAD
10h 57m
1 stop
Frontier Logo
1:32 pm - 7:33 am
IAD
-
DEN
20h 01m
1 stop
$308Frontier
Mon, Jul 20 - Thu, Jul 23
Frontier Logo
5:05 am - 6:01 pm
DEN
-
IAD
10h 56m
1 stop
Frontier Logo
9:50 am - 9:41 pm
IAD
-
DEN
13h 51m
1 stop
$309Frontier
Thu, Jul 16 - Fri, Jul 17
Frontier Logo
6:10 am - 8:20 am
DEN
-
IAD
24h 10m
1 stop
Frontier Logo
9:50 am - 3:48 am
IAD
-
DEN
19h 58m
1 stop
$310Frontier
Fri, Jul 17 - Sun, Jul 19
Frontier Logo
10:29 pm - 8:20 am
DEN
-
IAD
7h 51m
1 stop
Frontier Logo
6:49 am - 10:28 pm
IAD
-
DEN
17h 39m
1 stop
$311Frontier
Sat, Jul 18 - Sat, Jul 25
Frontier Logo
10:09 am - 10:52 pm
DEN
-
IAD
10h 43m
2 stops
Frontier Logo
9:50 am - 6:00 pm
IAD
-
DEN
10h 10m
1 stop
$312Frontier
Thu, Aug 6 - Wed, Aug 12
Frontier Logo
10:13 pm - 8:20 am
DEN
-
IAD
32h 07m
2 stops
Frontier Logo
8:33 pm - 9:03 am
IAD
-
DEN
14h 30m
1 stop
$313Frontier
Mon, Jul 20 - Sun, Jul 26
Frontier Logo
10:30 am - 12:28 am
DEN
-
IAD
11h 58m
1 stop
Frontier Logo
1:38 pm - 12:12 am
IAD
-
DEN
12h 34m
1 stop
$314Frontier
Fri, Oct 23 - Mon, Oct 26
Frontier Logo
11:46 pm - 5:14 pm
DEN
-
IAD
15h 28m
1 stop
Frontier Logo
6:49 am - 9:41 pm
IAD
-
DEN
16h 52m
2 stops
$315Frontier
Sun, Jul 26 - Sat, Aug 1
Frontier Logo
6:30 am - 5:14 pm
DEN
-
IAD
8h 44m
1 stop
Frontier Logo
9:50 am - 11:19 am
IAD
-
DEN
27h 29m
1 stop
$316Frontier
Mon, Jul 20 - Sun, Jul 26

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

Our best Frontier deals on Denver to Washington, D.C. Dulles Intl Airport flight tickets
Frontier
Oct 23
DEN10:30 amDenver Intl
11h 58m
1 stop
IAD12:28 amWashington, D.C. Dulles Intl
Oct 26
IAD1:38 pmWashington, D.C. Dulles Intl
12h 34m
1 stop
DEN12:12 amDenver Intl
$307
Frontier
Jul 20
DEN10:29 pmDenver Intl
7h 51m
1 stop
IAD8:20 amWashington, D.C. Dulles Intl
Jul 23
IAD9:50 amWashington, D.C. Dulles Intl
10h 10m
1 stop
DEN6:00 pmDenver Intl
$308
Frontier
Jul 16
DEN5:05 amDenver Intl
10h 56m
1 stop
IAD6:01 pmWashington, D.C. Dulles Intl
Jul 17
IAD9:50 amWashington, D.C. Dulles Intl
13h 51m
1 stop
DEN9:41 pmDenver Intl
$309

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

Our best American Airlines deals on Denver to Washington, D.C. Dulles Intl Airport flight tickets
American Airlines
Aug 12
DEN9:16 amDenver Intl
7h 11m
1 stop
IAD6:27 pmWashington, D.C. Dulles Intl
Aug 18
IAD10:27 amWashington, D.C. Dulles Intl
5h 44m
1 stop
DEN2:11 pmDenver Intl
$333
American Airlines
Sep 24
DEN7:26 amDenver Intl
8h 25m
1 stop
IAD5:51 pmWashington, D.C. Dulles Intl
Sep 28
IAD7:57 amWashington, D.C. Dulles Intl
8h 43m
1 stop
DEN2:40 pmDenver Intl
$341
American Airlines
Sep 9
DEN5:30 amDenver Intl
6h 48m
1 stop
IAD2:18 pmWashington, D.C. Dulles Intl
Sep 14
IAD7:57 amWashington, D.C. Dulles Intl
8h 43m
1 stop
DEN2:40 pmDenver Intl
$354

momondo Fare Finder

 
Customize your flight search to find flights from Denver to Washington, D.C. Dulles Intl Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated June 29, 2026.
Use the filters below to find and compare flights from Denver to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Fri 10/23

10:30 am-12:28 am

1 stop11h 58m

Washington, D.C. Dulles Intl

Mon 10/26

1:38 pm-12:12 am

1 stop12h 34m

$307

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Mon 7/20

9:58 am-10:55 pm

1 stop10h 57m

Washington, D.C. Dulles Intl

Thu 7/23

1:32 pm-7:33 am

1 stop20h 01m

$308

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Thu 7/16

5:05 am-6:01 pm

1 stop10h 56m

Washington, D.C. Dulles Intl

Fri 7/17

9:50 am-9:41 pm

1 stop13h 51m

$309

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Fri 7/17

6:10 am-8:20 am

1 stop24h 10m

Washington, D.C. Dulles Intl

Sun 7/19

9:50 am-3:48 am

1 stop19h 58m

$310

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Sat 7/18

10:29 pm-8:20 am

1 stop7h 51m

Washington, D.C. Dulles Intl

Sat 7/25

6:49 am-10:28 pm

1 stop17h 39m

$311
Quickest round-trip

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Thu 8/6

10:09 am-10:52 pm

2 stops10h 43m

Washington, D.C. Dulles Intl

Wed 8/12

9:50 am-6:00 pm

1 stop10h 10m

$312

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Mon 7/20

10:13 pm-8:20 am

2 stops32h 07m

Washington, D.C. Dulles Intl

Sun 7/26

8:33 pm-9:03 am

1 stop14h 30m

$313

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Fri 10/23

10:30 am-12:28 am

1 stop11h 58m

Washington, D.C. Dulles Intl

Mon 10/26

1:38 pm-12:12 am

1 stop12h 34m

$314

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Sun 7/26

11:46 pm-5:14 pm

1 stop15h 28m

Washington, D.C. Dulles Intl

Sat 8/1

6:49 am-9:41 pm

2 stops16h 52m

$315

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Mon 7/20

6:30 am-5:14 pm

1 stop8h 44m

Washington, D.C. Dulles Intl

Sun 7/26

9:50 am-11:19 am

1 stop27h 29m

$316

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Washington, D.C. from

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

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 typical price of a round-trip flight between Denver and Washington, D.C. Dulles Intl Airport?

What is the cheapest month to fly to Washington, D.C. Dulles Intl Airport?

In general, October is the cheapest month to fly from Denver to Washington, D.C. Dulles Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $313. If you aren’t able to travel to Washington, D.C. Dulles Intl Airport during the month of October, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $322.

What is the cheapest day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Our data shows that Thursday is the least expensive day to fly to Washington, D.C. Dulles Intl Airport. Tickets to fly out on this day can be as low as $508. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Denver to Washington, D.C. Dulles Intl Airport for around $698.

What is the cheapest time of day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Flying to Washington, D.C. Dulles Intl Airport from Denver in the morning is the least expensive time of day to depart. momondo users have found prices as low as $550 when looking at flights departing in the morning. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $748 on average. Flights to Washington, D.C. Dulles Intl Airport from Denver in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.

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

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

How far in advance should I book a flight from Denver to Washington, D.C. Dulles Intl Airport?

You are more likely to see cheaper flights to Washington, D.C. Dulles Intl Airport from Denver when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. Dulles Intl Airport for around $398 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. Dulles Intl Airport from Denver for as low as $327 on momondo.

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

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

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

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

As of June 2026, prices for Denver to Washington, D.C. Dulles Intl Airport flights are approximately 54% more expensive when compared to flights at the same time last year.

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

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

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

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

Best Price Found

$255

Fastest flight time

3h 18m

Direct flights

Every day
The best one-way flight to Washington, D.C. Dulles Intl Airport from Denver in the past 72 hours is $255. The best round-trip flight deal from Denver to Washington, D.C. Dulles Intl Airport found on momondo in the last 72 hours is $537.
The fastest flight from Denver to Washington, D.C. Dulles Intl Airport takes 3h 18m
Direct flights go from Denver to Washington, D.C. Dulles Intl Airport every day.
Search flight deals

Frequently asked questions about flying from Denver to Washington, D.C. Dulles Intl Airport

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

    A flight from Denver Intl to Washington, D.C. Dulles Intl will travel around 1465.5 mi. A reasonable flight in good conditions will take 3h 18m.

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

    Prices for flights from Denver Intl Airport to Washington, D.C. Dulles Intl Airport are refreshed on a daily basis.

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Denver Intl Airport to Washington, D.C. Dulles Intl Airport.

  • What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?

    The required travel and health documents for your Washington, D.C. Dulles Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington, D.C. Dulles Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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

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

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

Compare and see reviews for airlines that fly from Denver to Washington, D.C. Dulles Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $131Free CancellationRating
5.6
2,855 reviews
Search Frontier flights
SouthwestPriceFrom $177Free CancellationRating
7.9
4,246 reviews
Search Southwest flights
United AirlinesPriceFrom $217Free CancellationRating
7.4
9,896 reviews
Search United Airlines flights

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

    United Airlines flies from Denver to Washington, D.C. Dulles Intl Airport around 60 times per week, with 9,895 momondo users rating the airline 7.4/10. The cheapest United Airlines deal from Denver to Washington, D.C. Dulles Intl Airport in the last 72 hours was $217 (round-trip), much lower than the average airfare cost of $467 for United Airlines flights on this route.

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
National Harbor
Arlington
Gettysburg
Winchester
Waldorf
Laurel
Woodbridge
Fredericksburg
Gaithersburg
Linthicum Heights
Rockville
Colonial Beach
Towson
Manassas
Silver Spring
Sterling
Tysons
Springfield
Bethesda

Why use momondo?

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

Finding the right flight to Washington, D.C. from Denver is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Washington, D.C. quick and easy, saving you time and money.

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

Flights from Denver to Washington, D.C. with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once you have performed a search for Denver to Washington, D.C. 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 Washington, D.C. right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Washington, D.C. from Denver. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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