Cheap flights from Washington, D.C. to Denver from £66

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 24/9. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — DEN
31 Aug — 7 Sep1
1 adult

Cheapflights Tip: The best prices from Washington, D.C. to Denver Intl are usually found in September or January, booked 60 days in advance, depart on a Monday or Tuesday and return on a Monday

Cheap flight deals from Washington, D.C. to Denver

Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) to Denver (DEN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 26 August 2025.

Round-trip from

£131

One-way from

£66

Popular in

December

Cheapest in

September

Average price

£185

Good round-trip deal

£194 or less

Good one-way deal

£237 or less
United Airlines
  • United Airlines
  • 24/9-1/10
  • Nonstop
  • 7h 14m total
  • Washington, D.C. to Denver
United Airlines
  • United Airlines
  • 30/9
  • Nonstop
  • 3h 48m total
  • Washington, D.C. to Denver
Highest demand for flights based on searches. 2% potential increase in price (£3 potential increase over avg. return price).
Cheapest flight prices on average. 2% potential price decrease (£4 potential savings vs. average return price).
Average for round-trip flights in August 2025
Price to beat on a round-trip flight from Washington, D.C. (WAS) to Denver Intl.
Price to beat on a one-way flight from Washington, D.C. (WAS) to Denver Intl.

Find flight deals from Washington, D.C. to Denver

Cheapest flights from Washington, D.C. to Denver
Explore the most affordable flight options available from Washington, D.C. to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 26 August 2025.

Wed 24/922:14IAD - DEN
Nonstop3h 45mUnited Airlines
Tue 30/923:59DEN - IAD
Nonstop3h 23mUnited Airlines
Deal found 25/8£131
Sat 20/913:02IAD - DEN
1 stop10h 20mFrontier
Sat 27/919:47DEN - IAD
1 stop11h 30mFrontier
Deal found 25/8£132
Fri 17/1019:45IAD - DEN
Nonstop3h 50mSouthwest
Wed 22/1017:45DEN - IAD
Nonstop3h 20mSouthwest
Deal found 25/8£139
Sat 20/922:14IAD - DEN
Nonstop3h 45mUnited Airlines
Sat 27/923:59DEN - IAD
Nonstop3h 23mUnited Airlines
Deal found 25/8£146
Sat 20/916:24DCA - DEN
Nonstop3h 56mUnited Airlines
Sat 27/909:40DEN - DCA
Nonstop3h 27mUnited Airlines
Deal found 24/8£146
Sat 1/1106:40IAD - DEN
Nonstop3h 50mSouthwest
Wed 5/1107:25DEN - IAD
1 stop7h 40mSouthwest
Deal found 24/8£147
Thu 23/1022:09IAD - DEN
Nonstop3h 48mUnited Airlines
Mon 27/1016:05DEN - IAD
Nonstop3h 16mUnited Airlines
Deal found 24/8£148
Tue 23/918:05IAD - DEN
Nonstop3h 55mSouthwest
Tue 30/907:00DEN - IAD
1 stop8h 15mSouthwest
Deal found 23/8£154
Mon 22/917:47IAD - DEN
Nonstop3h 51mUnited Airlines
Fri 26/923:59DEN - IAD
Nonstop3h 23mUnited Airlines
Deal found 25/8£155
Wed 17/905:45IAD - DEN
Nonstop3h 35mSouthwest
Sat 20/909:40DEN - IAD
Nonstop3h 20mSouthwest
Deal found 25/8£161
Fri 19/922:14IAD - DEN
Nonstop3h 45mUnited Airlines
Tue 23/910:12DEN - IAD
Nonstop3h 22mUnited Airlines
Deal found 25/8£162
Sat 20/905:00DCA - DEN
1 stop6h 41mAmerican Airlines
Sat 27/914:17DEN - DCA
1 stop5h 43mAmerican Airlines
Deal found 25/8£162

Cheapflights Fare Finder

 
Customise your flight search to find flights from Washington, D.C. 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, Cheapflights users made 858,174 searches. Data last updated 26 August 2025.
Use the filters below to find and compare flights from Washington, D.C. to Denver that are best for you.

Fly from

Washington, D.C.

Fly to

Denver

Route

Depart

Return

Price

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Sat 27/9

22:09-23:59

Nonstop3h 50m

Denver Intl

Wed 1/10

23:59-05:22

Nonstop3h 23m

£131

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Sat 11/10

06:40-08:30

Nonstop3h 50m

Denver Intl

Sat 18/10

17:40-23:00

Nonstop3h 20m

£131

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Sat 25/10

17:36-19:25

Nonstop3h 49m

Denver Intl

Sat 25/10

23:59-05:22

Nonstop3h 23m

£131

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Wed 24/9

22:14-23:59

Nonstop3h 45m

Denver Intl

Tue 30/9

23:59-05:22

Nonstop3h 23m

£131

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Sat 4/10

22:09-23:57

Nonstop3h 48m

Denver Intl

Tue 7/10

23:59-05:22

Nonstop3h 23m

£131

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Wed 1/10

22:09-23:57

Nonstop3h 48m

Denver Intl

Sat 4/10

23:59-05:22

Nonstop3h 23m

£131

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Tue 28/10

18:40-20:35

Nonstop3h 55m

Denver Intl

Fri 31/10

17:10-22:25

Nonstop3h 15m

£139

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Sun 28/9

22:09-23:59

Nonstop3h 50m

Denver Intl

Wed 1/10

23:59-05:22

Nonstop3h 23m

£139

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Wed 12/11

08:25-10:24

Nonstop3h 59m

Denver Intl

Sun 16/11

23:59-05:16

Nonstop3h 17m

£139

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Thu 25/9

14:45-16:35

Nonstop3h 50m

Denver Intl

Sat 27/9

08:01-13:28

Nonstop3h 27m

£139

Flights are sorted by cheapest return flights first.

Deals found on 24/8

Showing 1-10 of 39 results
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Best time to book a flight from Washington, D.C. to Denver

Have a flexible travel schedule? Discover the best time to fly to Denver from Washington, D.C. with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. to Denver

How far ahead should I book a flight from Washington, D.C. to Denver?

Use this chart to determine the optimal time to book a return flight from Washington, D.C. to Denver. Price data was last updated on 22 August 2025.

To ensure you get the cheapest price possible for a flight from Washington, D.C. to Denver, you should look to book at least 60 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Washington, D.C. to Denver?

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. to Denver (average of £667). Flying from Washington, D.C. to Denver in July is currently the most expensive (average of £985). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from WAS to DEN?

Find hourly flight availability from Washington, D.C. to Denver. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 26 August 2025.

It’s typically best to fly out from Washington, D.C. to Denver in the morning. Doing so could potentially save you 23% on the flight price compared to flying in the afternoon, which is usually more expensive.

Weekly flight availability from Washington, D.C. to Denver

Explore weekly flight availability from Washington, D.C. to Denver. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 26 August 2025.

The most flights from WAS to DEN are scheduled on a Monday (29 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (20 on average).

How much does it cost for a return flight from Washington, D.C. to Denver?

Reviews of airlines servicing Denver

Get insights into the airlines that provide service to Denver. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Denver. Reviews last updated 26 August 2025.
Get a feel of what it's like to fly with Frontier from Washington, D.C. to Denver by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Comfort

5.5

Crew

6.7

Food

4.7

Overall

5.8

Boarding

6.1

Entertainment

4.4

Reviews

1 / 20
8.0
Excellent

Joe,Aug 2025

MYR - ISP

Having a direct flight at a discount price was great. Not happy about only flight being at 10pm. Also preboarding was haphazard. No lines or areas to stand for preboarding.

Comfort

5.5

Crew

6.7

Food

4.7

Overall

5.8

Boarding

6.1

Entertainment

4.4

Reviews

1 / 20
8.0
Excellent

Joe,Aug 2025

MYR - ISP

Having a direct flight at a discount price was great. Not happy about only flight being at 10pm. Also preboarding was haphazard. No lines or areas to stand for preboarding.

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. to Denver. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What airport do you fly into for flights to Denver from Washington, D.C.?

    Located just 18.5 mi from the city center, Denver Intl is the airport most travelers will use when flying to Denver from Washington, D.C.. Booking flights from Washington, D.C. to Denver Intl (DEN) should be relatively easy as there are 26 daily inbound flights from Washington, D.C. from 0 different airlines.

  • How long is the flight from Washington, D.C. to Denver?

    A quick flight from Washington, D.C. to Denver can take about 3h 50m. United Airlines provides one of the quickest options available for as low as £131. Airlines will cover a distance of 1448 mi. Generally, flights for this route are direct.

  • What are the most reliable airlines from Washington, D.C. to Denver?

    Before booking your flight to Denver from Washington, D.C., check out the most reliable airlines to get you to your destination on time: Ethiopian Air (85%), Copa Airlines (72%), United Airlines( 71%).

  • What are the cheapest flights from Washington, D.C. to Denver?

    On average you can expect to pay £255 for a flight from Washington, D.C. to Denver. The cheapest flight overall is £229 while the most popular route, (Washington, D.C. Reagan-National - Denver Intl) is currently priced at £136.

  • Can I find deals for flights from Washington, D.C. to Denver that include hotel bookings?

    Yes. In addition to deals on Washington, D.C. to Denver flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Washington, D.C. to Denver?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington, D.C. to Denver.

  • Can I find deals for business class flights from Washington, D.C. to Denver?

    Yes. Cheapflights offers flight deals from Washington, D.C. to Denver by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Washington, D.C. to Denver?

    Currently, January is the cheapest month in which you can book a flight from Washington, D.C. to Denver (average of £667). Flying from Washington, D.C. to Denver in July is currently the most expensive (average of £985). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
Winter Park
Frisco

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Yes, Cheapflights offers price alerts on Washington, D.C. to Denver flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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