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Cheap flights from Washington, D.C. to Denver from £57

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 19/11. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — DEN
14 Nov — 21 Nov1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from Washington, D.C. to Denver Intl are usually found in August or January, booked 85 days in advance, depart on a Tuesday or Thursday 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 15 October 2025.

Round-trip from

£106

One-way from

£57

Popular in

December

Cheapest in

August

Average price

£201
United Airlines
  • United Airlines
  • 13/11-17/11
  • Nonstop
  • 7h 22m total
  • Washington, D.C. to Denver
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Southwest
  • Southwest
  • 19/11
  • 1 total stop
  • 5h 10m total
  • Washington, D.C. to Denver
Search Deals
Highest demand for flights based on searches. 1% potential increase in price (£3 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£4 potential savings vs. average return price).
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Average for round-trip flights in October 2025
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Find flight deals from Washington, D.C. to Denver

Enter your travel dates to find the best prices.

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 15 October 2025.

Thu 13/1117:18IAD - DEN
Nonstop4h 02mUnited Airlines
Sun 16/1123:59DEN - IAD
Nonstop3h 17mUnited Airlines
Deal found 13/10£106
Tue 9/1216:05DCA - DEN
Nonstop4h 07mUnited Airlines
Sat 13/1209:35DEN - DCA
Nonstop3h 16mUnited Airlines
Deal found 13/10£106
Wed 12/1122:10IAD - DEN
Nonstop4h 05mUnited Airlines
Fri 14/1123:59DEN - IAD
Nonstop3h 17mUnited Airlines
Deal found 14/10£113
Thu 4/1216:40DCA - DEN
1 stop5h 10mSouthwest
Sun 7/1207:45DEN - DCA
1 stop4h 35mSouthwest
Deal found 13/10£114
Wed 12/1115:40DCA - DEN
1 stop6h 15mSouthwest
Thu 13/1114:10DEN - DCA
1 stop4h 45mSouthwest
Deal found 13/10£117
Wed 17/1222:10IAD - DEN
Nonstop4h 05mUnited Airlines
Sat 10/107:45DEN - IAD
Nonstop3h 27mUnited Airlines
Deal found 13/10£119
Fri 7/1122:10IAD - DEN
Nonstop4h 05mUnited Airlines
Sun 9/1123:59DEN - IAD
Nonstop3h 17mUnited Airlines
Deal found 14/10£121
Sat 15/1108:00DCA - DEN
1 stop5h 45mSouthwest
Mon 17/1110:20DEN - DCA
1 stop6h 45mSouthwest
Deal found 14/10£121
Wed 12/1106:00DCA - DEN
2 stops7h 15mSouthwest
Sun 16/1107:20DEN - DCA
1 stop6h 55mSouthwest
Deal found 13/10£125
Fri 7/1119:50IAD - DEN
Nonstop3h 50mSouthwest
Sat 8/1106:00DEN - IAD
1 stop7h 15mSouthwest
Deal found 12/10£128
Fri 7/1116:20DCA - DEN
1 stop7h 10mSouthwest
Wed 12/1114:25DEN - DCA
1 stop6h 25mSouthwest
Deal found 13/10£128
Tue 4/1116:40DCA - DEN
1 stop5h 10mSouthwest
Fri 7/1107:45DEN - DCA
1 stop4h 35mSouthwest
Deal found 13/10£129

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 15 October 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

Sun 7/12

19:50-21:40

Nonstop3h 50m

Denver Intl

Fri 12/12

18:15-23:30

Nonstop3h 15m

£106

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Fri 12/12

19:50-21:40

Nonstop3h 50m

Denver Intl

Sun 14/12

07:50-13:10

Nonstop3h 20m

£106

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Sat 15/11

15:55-17:50

Nonstop3h 55m

Denver Intl

Tue 18/11

16:50-22:00

Nonstop3h 10m

£106

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Thu 6/11

05:05-07:00

Nonstop3h 55m

Denver Intl

Thu 13/11

06:20-17:05

1 stop8h 45m

£121

Washington, D.C.Denver

DCA - DEN

DCADEN

Washington, D.C. Reagan-National

Thu 6/11

15:55-21:35

1 stop7h 40m

Denver Intl

Sat 8/11

07:55-15:00

1 stop5h 05m

£136

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Tue 11/11

17:45-19:45

Nonstop4h 00m

Denver Intl

Tue 18/11

10:30-15:45

Nonstop3h 15m

£148

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Thu 13/11

19:50-21:40

Nonstop3h 50m

Denver Intl

Mon 17/11

07:25-17:05

1 stop7h 40m

£150

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Sat 1/11

17:18-19:29

Nonstop4h 11m

Denver Intl

Wed 5/11

23:59-05:16

Nonstop3h 17m

£155

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Sat 7/2

12:30-17:37

1 stop7h 07m

Denver Intl

Mon 9/2

00:59-09:11

1 stop6h 12m

£163

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Wed 12/11

08:25-10:24

Nonstop3h 59m

Denver Intl

Sat 15/11

08:00-13:18

Nonstop3h 18m

£166

Flights are sorted by cheapest return flights first.

Deals found on 13/10

Showing 1-10 of 46 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 10 October 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 85 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, November is the cheapest month in which you can book a flight from Washington, D.C. to Denver (average of £59). Flying from Washington, D.C. to Denver in June is currently the most expensive (average of £130). 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 15 October 2025.

It’s typically best to fly out from Washington, D.C. to Denver at midday. Doing so could potentially save you 48% 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 15 October 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 (17 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 15 October 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.
Frontier
5.8
Fair
3,135 reviews
Check prices

Comfort

5.5

Boarding

6.1

Crew

6.7

Overall

5.8

Entertainment

4.4

Food

4.6

Reviews

1 / 20
2.0
Mediocre

Shawn,Sept 2025

SAN - SFO

The flight was over booked and was unadble to get help with issue. I could not get a refund or rebooked in order to make my trip
Frontier
5.8
Fair
3,135 reviews
Frontier
5.8
Fair
3,135 reviews
Check prices

Comfort

5.5

Boarding

6.1

Crew

6.7

Overall

5.8

Entertainment

4.4

Food

4.6

Reviews

1 / 20
2.0
Mediocre

Shawn,Sept 2025

SAN - SFO

The flight was over booked and was unadble to get help with issue. I could not get a refund or rebooked in order to make my trip

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 24 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. Southwest provides one of the quickest options available for as low as £106. Airlines will cover a distance of 1448 mi. Both multi-stop and direct flights can be found to your destination and back.

  • 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 (93%), Brussels Airlines (83%), Copa Airlines( 82%).

  • 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, November is the cheapest month in which you can book a flight from Washington, D.C. to Denver (average of £59). Flying from Washington, D.C. to Denver in June is currently the most expensive (average of £130). 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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Can Cheapflights notify me if prices for flights from Washington, D.C. to Denver become cheaper?

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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