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Cheap flights from Denver to Washington, D.C. from $73

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 3/1. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
1:09 pm - 12:36 am
DEN
-
IAD
9h 27m
1 stop
Frontier Logo
6:20 am - 11:03 pm
IAD
-
DEN
18h 43m
1 stop
$128Frontier
Wed, Apr 22 - Tue, Apr 28
Frontier Logo
11:59 pm - 8:56 am
DEN
-
IAD
6h 57m
1 stop
Frontier Logo
7:05 am - 12:09 pm
IAD
-
DEN
7h 04m
1 stop
$131Frontier
Wed, Apr 15 - Sat, Apr 18
Frontier Logo
11:59 pm - 8:56 am
DEN
-
IAD
6h 57m
1 stop
Frontier Logo
7:05 am - 12:09 pm
IAD
-
DEN
7h 04m
1 stop
$134Frontier
Wed, Apr 15 - Sat, Apr 18
Frontier Logo
11:59 pm - 12:36 am
DEN
-
IAD
22h 37m
1 stop
Frontier Logo
7:04 pm - 1:40 pm
IAD
-
DEN
20h 36m
1 stop
$143Frontier
Tue, Apr 21 - Fri, Apr 24
Frontier Logo
1:09 pm - 12:36 am
DEN
-
IAD
9h 27m
1 stop
Frontier Logo
7:04 pm - 7:00 am
IAD
-
DEN
13h 56m
1 stop
$144Frontier
Wed, Apr 15 - Sun, Apr 19
Frontier Logo
1:09 pm - 12:36 am
DEN
-
IAD
9h 27m
1 stop
Frontier Logo
6:20 am - 12:09 pm
IAD
-
DEN
7h 49m
1 stop
$148Frontier
Tue, Apr 21 - Thu, Apr 23
Frontier Logo
6:00 am - 6:19 pm
DEN
-
IAD
10h 19m
1 stop
Frontier Logo
9:51 am - 12:09 pm
IAD
-
DEN
28h 18m
1 stop
$149Frontier
Thu, May 7 - Mon, May 11
Frontier Logo
11:59 pm - 8:56 am
DEN
-
IAD
6h 57m
1 stop
Frontier Logo
7:04 pm - 7:00 am
IAD
-
DEN
13h 56m
1 stop
$150Frontier
Wed, Apr 15 - Sun, Apr 19
Frontier Logo
1:09 pm - 12:36 am
DEN
-
IAD
9h 27m
1 stop
Frontier Logo
6:20 am - 9:58 pm
IAD
-
DEN
17h 38m
2 stops
$151Frontier
Wed, Apr 22 - Tue, Apr 28
Frontier Logo
6:00 am - 6:19 pm
DEN
-
IAD
10h 19m
1 stop
Frontier Logo
9:51 am - 12:09 pm
IAD
-
DEN
28h 18m
1 stop
$154Frontier
Fri, May 8 - Mon, May 11

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
Apr 22
DEN1:09 pmDenver Intl
9h 27m
1 stop
IAD12:36 amWashington, D.C. Dulles Intl
Apr 28
IAD6:20 amWashington, D.C. Dulles Intl
18h 43m
1 stop
DEN11:03 pmDenver Intl
$128
Frontier
Apr 15
DEN11:59 pmDenver Intl
6h 57m
1 stop
IAD8:56 amWashington, D.C. Dulles Intl
Apr 18
IAD7:05 amWashington, D.C. Dulles Intl
7h 04m
1 stop
DEN12:09 pmDenver Intl
$131
Frontier
Apr 15
DEN11:59 pmDenver Intl
6h 57m
1 stop
IAD8:56 amWashington, D.C. Dulles Intl
Apr 18
IAD7:05 amWashington, D.C. Dulles Intl
7h 04m
1 stop
DEN12:09 pmDenver Intl
$134

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

Our best Southwest deals on Denver to Washington, D.C. Dulles Intl Airport flight tickets
Southwest
Apr 22
DEN6:10 pmDenver Intl
3h 30m
IAD11:40 pmWashington, D.C. Dulles Intl
Apr 28
IAD6:20 amWashington, D.C. Dulles Intl
3h 50m
DEN8:10 amDenver Intl
$177
Southwest
Feb 24
DEN6:00 amDenver Intl
8h 50m
1 stop
IAD4:50 pmWashington, D.C. Dulles Intl
Mar 5
IAD5:50 amWashington, D.C. Dulles Intl
3h 55m
DEN7:45 amDenver Intl
$287
Southwest
Feb 25
DEN4:45 pmDenver Intl
3h 10m
IAD9:55 pmWashington, D.C. Dulles Intl
Feb 28
IAD5:05 amWashington, D.C. Dulles Intl
4h 00m
DEN7:05 amDenver Intl
$297

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 February 11, 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

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Wed 4/22

1:09 pm-12:36 am

1 stop9h 27m

Washington, D.C. Dulles Intl

Tue 4/28

6:20 am-11:03 pm

1 stop18h 43m

$128

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Wed 4/15

11:59 pm-8:56 am

1 stop6h 57m

Washington, D.C. Dulles Intl

Sat 4/18

7:05 am-12:09 pm

1 stop7h 04m

$131

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Wed 4/15

11:59 pm-8:56 am

1 stop6h 57m

Washington, D.C. Dulles Intl

Sat 4/18

7:05 am-12:09 pm

1 stop7h 04m

$134

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Tue 4/21

11:59 pm-12:36 am

1 stop22h 37m

Washington, D.C. Dulles Intl

Fri 4/24

7:04 pm-1:40 pm

1 stop20h 36m

$143

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Wed 4/15

1:09 pm-12:36 am

1 stop9h 27m

Washington, D.C. Dulles Intl

Sun 4/19

7:04 pm-7:00 am

1 stop13h 56m

$144

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Tue 4/21

1:09 pm-12:36 am

1 stop9h 27m

Washington, D.C. Dulles Intl

Thu 4/23

6:20 am-12:09 pm

1 stop7h 49m

$148

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Thu 5/7

6:00 am-6:19 pm

1 stop10h 19m

Washington, D.C. Dulles Intl

Mon 5/11

9:51 am-12:09 pm

1 stop28h 18m

$149

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Wed 4/15

11:59 pm-8:56 am

1 stop6h 57m

Washington, D.C. Dulles Intl

Sun 4/19

7:04 pm-7:00 am

1 stop13h 56m

$150

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Wed 4/22

1:09 pm-12:36 am

1 stop9h 27m

Washington, D.C. Dulles Intl

Tue 4/28

6:20 am-9:58 pm

2 stops17h 38m

$151

DenverWashington, D.C.

DEN - IAD

DENIAD

Denver Intl

Fri 5/8

6:00 am-6:19 pm

1 stop10h 19m

Washington, D.C. Dulles Intl

Mon 5/11

9:51 am-12:09 pm

1 stop28h 18m

$154

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

In general, August 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 $286. If you aren’t able to travel to Washington, D.C. Dulles Intl Airport during the month of August, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $303.

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 $469. 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 $658.

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 $490 when looking at flights departing in the morning. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $630 on average. Flights to Washington, D.C. Dulles Intl Airport from Denver in the afternoon 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 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 $341 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 $279 on momondo.

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

There are 4 cabin classes available to choose from on Denver Intl to Washington, D.C. Dulles 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 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 February 2026, prices for Denver to Washington, D.C. Dulles Intl Airport flights are approximately 2% 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

$207

Fastest flight time

3h 10m

Direct flights

Every day
The best one-way flight to Washington, D.C. Dulles Intl Airport from Denver in the past 72 hours is $207. The best round-trip flight deal from Denver to Washington, D.C. Dulles Intl Airport found on momondo in the last 72 hours is $388.
The fastest flight from Denver to Washington, D.C. Dulles Intl Airport takes 3h 10m
Direct flights go from Denver to Washington, D.C. Dulles Intl Airport every day.
Search flight deals

  • 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 10m.

  • 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 $111Free CancellationRating
5.7
3,052 reviews
Search Frontier flights
SouthwestPriceFrom $177Free CancellationRating
8.0
4,280 reviews
Search Southwest flights
United AirlinesPriceFrom $201Free CancellationRating
7.4
9,274 reviews
Search United Airlines flights

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

    Southwest flies from Denver to Washington, D.C. Dulles Intl Airport around 8 times per week, with 4,280 momondo users rating the airline 8.0/10. The cheapest Southwest deal from Denver to Washington, D.C. Dulles Intl Airport in the last 72 hours was $177 (round-trip), much lower than the average airfare cost of $295 for Southwest flights on this route.

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

    Another popular option for Denver to Washington, D.C. Dulles Intl Airport flights is United Airlines (7.4/10, 9,274 ratings). United Airlines flies from Denver to Washington, D.C. Dulles Intl Airport around 12 times per week, with deals starting from $201 round-trip and rising to an average price of around $361.

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
Gettysburg
Arlington
Winchester
Waldorf
Woodbridge
Laurel
Colonial Beach
Tysons
Silver Spring
Towson
Fredericksburg
Gaithersburg
Rockville
Manassas
Springfield
Sterling
Fairfax
Linthicum Heights

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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