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$42+ Cheap flights from Washington to Denver (DEN)

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 4/6. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DEN
Mar 28 — Apr 41
Sat 3/28
Sat 4/4
1 adult, Economy
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Cheap flight deals from Washington to Denver

Cheapest flights from Washington to Denver
Explore the most affordable flight options available from Washington to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 26, 2026.

This Frontier deal was found by Cheapflights users on 2/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/187:12 pm
SEA
-
DEN
Nonstop2h 47m
Frontier
Mon 4/207:15 am
DEN
-
SEA
Nonstop3h 12m
Frontier
Deal found 2/25$79
This Cheapflightsfares deal was found by Cheapflights users on 2/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/217:12 pm
SEA
-
DEN
Nonstop2h 47m
Frontier
Tue 5/57:15 am
DEN
-
SEA
Nonstop3h 12m
Frontier
Deal found 2/25$80
This Kiwi.com deal was found by Cheapflights users on 2/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/177:12 pm
SEA
-
DEN
Nonstop2h 47m
Frontier
Mon 4/207:15 am
DEN
-
SEA
Nonstop3h 12m
Frontier
Deal found 2/25$81
This Kiwi.com deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/268:05 pm
SEA
-
DEN
Nonstop2h 54m
Multiple Airlines
Tue 4/287:15 am
DEN
-
SEA
Nonstop3h 12m
Multiple Airlines
Deal found 2/24$82
This Kiwi.com deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/3010:10 pm
SEA
-
DEN
1 stop10h 34m
Frontier
Tue 5/57:15 am
DEN
-
SEA
Nonstop3h 12m
Frontier
Deal found 2/24$84
This United Airlines deal was found by Cheapflights users on 2/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/145:00 am
SEA
-
DEN
Nonstop2h 44m
United Airlines
Tue 4/215:57 pm
DEN
-
SEA
1 stop6h 30m
United Airlines
Deal found 2/25$85
This Kiwi.com deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/1410:57 am
SEA
-
DEN
1 stop7h 52m
Frontier
Tue 4/217:15 am
DEN
-
SEA
Nonstop3h 12m
Frontier
Deal found 2/24$86
This Kiwi.com deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/268:05 pm
SEA
-
DEN
Nonstop2h 54m
Multiple Airlines
Mon 4/277:15 am
DEN
-
SEA
Nonstop3h 12m
Multiple Airlines
Deal found 2/24$87
This Southwest deal was found by Cheapflights users on 2/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/316:00 am
SEA
-
DEN
Nonstop2h 40m
Southwest
Thu 4/28:50 pm
DEN
-
SEA
Nonstop3h 00m
Southwest
Deal found 2/25$88
This Kiwi.com deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/910:05 pm
SEA
-
DEN
1 stop10h 38m
Frontier
Sat 4/187:15 am
DEN
-
SEA
Nonstop3h 12m
Frontier
Deal found 2/24$89
This Kiwi.com deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/3010:10 pm
SEA
-
DEN
1 stop10h 34m
Frontier
Thu 5/712:51 pm
DEN
-
SEA
Nonstop3h 14m
Frontier
Deal found 2/24$90
This Trip.com deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/118:11 pm
SEA
-
DEN
Nonstop2h 45m
Multiple Airlines
Sat 4/187:15 am
DEN
-
SEA
Nonstop3h 12m
Multiple Airlines
Deal found 2/24$91

Find flight deals from Washington to Denver

Keep the following information in mind while searching for Washington to Denver flight deals. Data was last updated February 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$79
(Booking.com)

One-way from

$42
(Priceline)

Popular in

June

Cheapest in

January

Average price

$205

Good round-trip deal

$216 or less

Good one-way deal

$143 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Denver Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Denver Intl flights.
Search Deals
From Washington to Denver Intl
Search Deals
One-way flight from Washington to Denver Intl
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($19 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($3 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals
Price to beat on a round-trip flight from Washington to Denver Intl.
Search Deals
Price to beat on a one-way flight from Washington to Denver Intl.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington 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 2,558,603 searches. Data last updated February 26, 2026.
Use the filters below to find and compare flights from Washington to Denver that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Sat 4/18

5:35 am-11:32 am

1 stop4h 57m

Denver Intl

Sat 4/25

1:20 pm-3:15 pm

Nonstop2h 55m

$107

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Fri 3/13

7:45 pm-11:29 pm

Nonstop2h 44m

Denver Intl

Wed 3/18

6:30 am-8:38 am

Nonstop3h 08m

$117

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Mon 4/6

7:46 pm-11:32 pm

Nonstop2h 46m

Denver Intl

Tue 4/7

6:15 pm-12:03 am

1 stop6h 48m

$127

PortlandDenver

PDX - DEN

PDXDEN

Portland

Tue 4/21

7:15 am-5:24 pm

1 stop9h 09m

Denver Intl

Tue 4/28

11:46 am-1:35 pm

Nonstop2h 49m

$137

PortlandDenver

PDX - DEN

PDXDEN

Portland

Wed 4/22

6:05 pm-11:50 pm

1 stop4h 45m

Denver Intl

Tue 4/28

1:20 pm-5:10 pm

1 stop4h 50m

$137

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 4/15

8:25 am-5:30 pm

1 stop8h 05m

Denver Intl

Wed 4/22

8:30 pm-10:30 pm

Nonstop3h 00m

$145

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Mon 3/23

5:30 am-9:05 am

Nonstop2h 35m

Denver Intl

Wed 3/25

8:30 pm-10:30 pm

Nonstop3h 00m

$157

PortlandDenver

PDX - DEN

PDXDEN

Portland

Thu 4/23

6:05 pm-11:50 pm

1 stop4h 45m

Denver Intl

Wed 4/29

5:30 am-8:56 am

1 stop4h 26m

$157

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Sun 3/29

6:00 am-9:40 am

Nonstop2h 40m

Denver Intl

Tue 4/7

3:00 pm-4:55 pm

Nonstop2h 55m

$159

SpokaneDenver

GEG - DEN

GEGDEN

Spokane

Fri 4/10

3:25 pm-11:32 pm

1 stop7h 07m

Denver Intl

Fri 4/17

7:45 pm-12:20 am

1 stop5h 35m

$165

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/23

Showing 1-10 of 60 resultsSorted by cheapest first
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6

Best time to book a flight from Washington to Denver

Have a flexible travel schedule? Discover the best time to fly to Denver from Washington with our price prediction graph.
Estimated round-trip 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 to Denver

What is the cheapest month to book a flight from State of Washington to Denver?

Currently, January is the cheapest month in which you can book a flight from State of Washington to Denver (average of $53). Flying from State of Washington to Denver in July is currently the most expensive (average of $99). 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 WA to DEN?

Find hourly flight availability from Washington 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 February 26, 2026.

One of the essential ways to save on airfare from State of Washington to Denver is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 7% on airfare.

What is the cheapest day to fly from State of Washington to Denver?

Use this chart to determine the cheapest time to fly round-trip from Washington to Denver. Price data was last updated on February 21, 2026.

Travelers seeking maximum savings on their State of Washington to Denver flight should consider departing on Friday at noon when fares are most often at their lowest. Tuesday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from State of Washington to Denver

Explore weekly flight availability from Washington 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 February 26, 2026.

The most flights from USWA to DEN are scheduled on a Wednesday (31 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (16 on average).

Related info for your journey

Find useful and relevant information for your journey from Washington 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?

    Most people fly into Denver Intl (DEN) if they book a flight to Denver from Washington. Denver Intl is conveniently located just 18.5 mi from Denver’s city center.

  • How popular is this State of Washington to Denver flight route?

    The Washington to Denver Intl flight path was viewed by 275 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from State of Washington to Denver?

    Airlines like Delta, Alaska Airlines, and Southwest fly from State of Washington to Denver in about 4h 57m. The time it takes to get you to your destination can typically vary by up to 4h 12m. There are 1022 mi between State of Washington and Denver. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from State of Washington to Denver one-way?

    $29 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on United Airlines and Delta, with prices starting from $59 and $68, respectively.

  • What are the most popular routes from State of Washington to Denver?

    When deciding which route to take from State of Washington to Denver consider Seattle/Tacoma Intl - Denver Intl, Portland - Denver Intl or Everett Paine Field - Denver Intl as they are the most popular.

  • What are the most reliable airlines from State of Washington to Denver?

    Before booking your flight to Denver from State of Washington, check out the most reliable airlines to get you to your destination on time: Aeromexico (93%), Southwest (92%), SkyWest Airlines( 92%).

  • What are the cheapest flights from State of Washington to Denver?

    While on average a flight from State of Washington to Denver is generally $625, our data shows the cheapest flight currently is $83. When looking at the most popular route, (Seattle/Tacoma Intl - Denver Intl), you can expect to pay $54 for that flight.

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

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

  • How can I find direct flights from Washington to Denver?

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

  • Can I find deals for business class flights from Washington to Denver?

    Yes. Cheapflights offers flight deals from Washington 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 State of Washington to Denver?

    Currently, January is the cheapest month in which you can book a flight from State of Washington to Denver (average of $53). Flying from State of Washington to Denver in July is currently the most expensive (average of $99). 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

Traveling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
Thornton
Black Hawk
Lakewood
Broomfield
Westminster
Golden
Centennial
Greeley
Lone Tree
Wheat Ridge
Silverthorne
Cripple Creek
Winter Park
Central City
Glendale
Manitou Springs
Frisco
Fort Morgan
Brighton
Evergreen

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Top 6 airlines flying from Washington to Denver

Discover the top 6 airlines that operate flights from Washington to Denver. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 26, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$57Average$154FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$78Average$352FlexibilityNo cancel feeOn-time85%
DeltaCheapest$98Average$253FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$117Average$357FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$126Average$322FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$131Average$332FlexibilityNo cancel feeOn-time69%

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