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Cheap flights from Washington, D.C. Dulles Intl Airport to Denver from $89

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. Dulles Intl Airport to Denver departing on 10/25. 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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Find the cheapest flights from Washington, D.C. Dulles Intl Airport to Denver

Cheap round-trip flights

Southwest Logo
6:40 am - 8:30 amIAD-DEN
3h 50mnonstop
Southwest Logo
5:45 pm - 11:05 pmDEN-IAD
3h 20mnonstop
$149Southwest
Find Deal
Sat, Oct 25 - Wed, Oct 29
Frontier Logo
1:55 pm - 8:47 pmIAD-DEN
8h 52m1 stop
Frontier Logo
12:59 am - 12:55 pmDEN-IAD
9h 56m1 stop
$150Frontier
Find Deal
Mon, Sep 29 - Thu, Oct 2
Frontier Logo
1:55 pm - 8:47 pmIAD-DEN
8h 52m1 stop
Frontier Logo
11:59 pm - 12:22 pmDEN-IAD
10h 23m1 stop
$155Frontier
Find Deal
Thu, Oct 2 - Wed, Oct 8
Frontier Logo
9:38 pm - 8:15 amIAD-DEN
12h 37m1 stop
Frontier Logo
1:42 pm - 11:29 pmDEN-IAD
7h 47m1 stop
$157Frontier
Find Deal
Sat, Oct 25 - Fri, Oct 31
Frontier Logo
9:38 pm - 8:15 amIAD-DEN
12h 37m1 stop
Frontier Logo
12:25 pm - 11:55 pmDEN-IAD
9h 30m1 stop
$158Frontier
Find Deal
Sat, Oct 25 - Sat, Nov 1
American Airlines Logo
5:40 pm - 10:09 pmIAD-DEN
6h 29m1 stop
American Airlines Logo
11:59 pm - 9:55 amDEN-IAD
7h 56m1 stop
$169American Airlines
Find Deal
Tue, Sep 30 - Tue, Oct 7
American Airlines Logo
6:11 am - 11:46 amIAD-DEN
7h 35m1 stop
American Airlines Logo
10:23 am - 11:07 pmDEN-IAD
10h 44m2 stops
$172American Airlines
Find Deal
Sat, Nov 1 - Tue, Nov 4
Southwest Logo
3:55 pm - 5:50 pmIAD-DEN
3h 55mnonstop
Southwest Logo
5:00 pm - 10:10 pmDEN-IAD
3h 10mnonstop
$177Southwest
Find Deal
Sat, Nov 8 - Tue, Nov 11
United Airlines Logo
10:09 pm - 11:57 pmIAD-DEN
3h 48mnonstop
United Airlines Logo
11:59 pm - 5:22 amDEN-IAD
3h 23mnonstop
$181United Airlines
Find Deal
Fri, Oct 3 - Mon, Oct 6
United Airlines Logo
10:09 pm - 11:57 pmIAD-DEN
3h 48mnonstop
United Airlines Logo
8:01 am - 1:28 pmDEN-IAD
3h 27mnonstop
$195United Airlines
Find Deal
Wed, Oct 15 - Sat, Oct 18

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

Our best Southwest deals on Washington, D.C. Dulles Intl Airport to Denver flight tickets
Southwest
Oct 25
IAD6:40 amWashington, D.C. Dulles Intl
3h 50m
DEN8:30 amDenver Intl
Oct 29
DEN5:45 pmDenver Intl
3h 20m
IAD11:05 pmWashington, D.C. Dulles Intl
$149
Find similar
Southwest
Nov 8
IAD3:55 pmWashington, D.C. Dulles Intl
3h 55m
DEN5:50 pmDenver Intl
Nov 11
DEN5:00 pmDenver Intl
3h 10m
IAD10:10 pmWashington, D.C. Dulles Intl
$177
Find similar
Southwest
Sep 30
IAD5:45 amWashington, D.C. Dulles Intl
3h 35m
DEN7:20 amDenver Intl
Oct 4
DEN5:40 pmDenver Intl
3h 20m
IAD11:00 pmWashington, D.C. Dulles Intl
$194
Find similar

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

Our best Frontier deals on Washington, D.C. Dulles Intl Airport to Denver flight tickets
Frontier
Sep 29
IAD1:55 pmWashington, D.C. Dulles Intl
8h 52m
1 stop
DEN8:47 pmDenver Intl
Oct 2
DEN12:59 amDenver Intl
9h 56m
1 stop
IAD12:55 pmWashington, D.C. Dulles Intl
$150
Find similar
Frontier
Oct 2
IAD1:55 pmWashington, D.C. Dulles Intl
8h 52m
1 stop
DEN8:47 pmDenver Intl
Oct 8
DEN11:59 pmDenver Intl
10h 23m
1 stop
IAD12:22 pmWashington, D.C. Dulles Intl
$155
Find similar
Frontier
Oct 25
IAD9:38 pmWashington, D.C. Dulles Intl
12h 37m
1 stop
DEN8:15 amDenver Intl
Oct 31
DEN1:42 pmDenver Intl
7h 47m
1 stop
IAD11:29 pmWashington, D.C. Dulles Intl
$157
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Dulles Intl Airport to Denver 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 September 15, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Denver that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Sat 10/25

6:40 am-8:30 am

Nonstop3h 50m

Denver Intl

Wed 10/29

5:45 pm-11:05 pm

Nonstop3h 20m

$149

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Mon 9/29

1:55 pm-8:47 pm

1 stop8h 52m

Denver Intl

Thu 10/2

12:59 am-12:55 pm

1 stop9h 56m

$150

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Thu 10/2

1:55 pm-8:47 pm

1 stop8h 52m

Denver Intl

Wed 10/8

11:59 pm-12:22 pm

1 stop10h 23m

$155

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Sat 10/25

9:38 pm-8:15 am

1 stop12h 37m

Denver Intl

Fri 10/31

1:42 pm-11:29 pm

1 stop7h 47m

$157

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Sat 10/25

9:38 pm-8:15 am

1 stop12h 37m

Denver Intl

Sat 11/1

12:25 pm-11:55 pm

1 stop9h 30m

$158

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Tue 9/30

5:40 pm-10:09 pm

1 stop6h 29m

Denver Intl

Tue 10/7

11:59 pm-9:55 am

1 stop7h 56m

$169

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Sat 11/1

6:11 am-11:46 am

1 stop7h 35m

Denver Intl

Tue 11/4

10:23 am-11:07 pm

2 stops10h 44m

$172

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Sat 11/8

3:55 pm-5:50 pm

Nonstop3h 55m

Denver Intl

Tue 11/11

5:00 pm-10:10 pm

Nonstop3h 10m

$177

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Fri 10/3

10:09 pm-11:57 pm

Nonstop3h 48m

Denver Intl

Mon 10/6

11:59 pm-5:22 am

Nonstop3h 23m

$181

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Wed 10/15

10:09 pm-11:57 pm

Nonstop3h 48m

Denver Intl

Sat 10/18

8:01 am-1:28 pm

Nonstop3h 27m

$195

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 Denver from

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

What is the cheapest month to fly to Denver?

The cheapest month to fly to Denver from Washington, D.C. Dulles Intl Airport is in January. Flight prices, which tend to average around $307, 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 February to fly from Washington, D.C. Dulles Intl Airport, when ticket prices are also cheap, with an average price of $307.

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 $300. 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 $371.

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 $259. Flights in the evening are often more expensive with an average ticket price of $373.

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

Fly from Washington, D.C. Dulles Intl to Denver Intl for the best Washington, D.C. Dulles Intl - 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. Dulles Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Denver for around $342 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. Dulles Intl Airport for as low as $275 on momondo.

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

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

As of September 2025, prices for Washington, D.C. Dulles Intl Airport to Denver flights are approximately 7% cheaper when compared to flights at the same time last year.

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

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

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

Best Price Found

$148

Fastest flight time

3h 35m

Direct flights

Every day

Airports in Denver

1 airport
The best one-way flight to Denver from Washington, D.C. Dulles Intl Airport in the past 72 hours is $148. The best round-trip flight deal from Washington, D.C. Dulles Intl Airport to Denver found on momondo in the last 72 hours is $327.
The fastest flight from Washington, D.C. Dulles Intl Airport to Denver takes 3h 35m
Direct flights go from Washington, D.C. Dulles Intl Airport to Denver every day.
There is 1 airport near Denver: Denver Intl (DEN)
Search flight deals

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

    A flight from Washington, D.C. Dulles Intl to Denver Intl will travel around 1465.5 mi. Flights usually cover this in 3h 35m, depending on flying conditions and air traffic around both airports.

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

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

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

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

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

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

Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to Denver with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $100Free CancellationRating
5.8
3,173 reviews
Search Frontier flights
American AirlinesPriceFrom $166Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $178Free CancellationRating
8.0
4,245 reviews
Search Southwest flights
United AirlinesPriceFrom $219Free CancellationRating
7.4
8,931 reviews
Search United Airlines flights
DeltaPriceFrom $236Free CancellationRating
7.9
7,956 reviews
Search Delta flights

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

    Southwest flight deals from Washington, D.C. Dulles Intl Airport to Denver start from $178 round-trip. Over the 13 Southwest flights for this route in a normal week, average airfare is usually $296 round-trip - but some users have found much cheaper deals with momondo.

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

    The best United Airlines deal for Washington, D.C. Dulles Intl Airport to Denver flight tickets found on momondo in the last 72 hours was $219, round-trip. It should be noted that an average United Airlines flight deal for this route in this time was higher, at $374 round-trip. United Airlines operates 50 flights out of Washington, D.C. Dulles Intl Airport into Denver in an average week, so prices vary by time and availability. 8,931 United Airlines reviews by users on momondo have scored the airline at 7.4/10.

Traveling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
Estes Park
Breckenridge
Black Hawk
Aurora
Fort Collins
Keystone
Cripple Creek
Boulder
Manitou Springs
Longmont
Lakewood
Greeley
Thornton
Westminster
Winter Park
Copper Mountain
Frisco
Grand Lake
Silverthorne
Golden

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 helps you find the best flight between Washington, D.C. and Denver by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

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