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$28+ 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 2/22. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DEN
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Find 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 October 30, 2025.

This Frontier deal was found by Cheapflights users on 10/29. 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.
Tue 11/41:37 pmSEA - DEN
Nonstop2h 53mFrontier
Tue 11/189:58 amDEN - SEA
Nonstop3h 09mFrontier
Deal found 10/29$93
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
Wed 11/198:37 amSEA - DEN
Nonstop2h 50mMultiple Airlines
Thu 11/209:44 amDEN - SEA
Nonstop3h 12mMultiple Airlines
Deal found 10/29$94
This Frontier deal was found by Cheapflights users on 10/30. 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.
Fri 12/510:51 amSEA - DEN
1 stop6h 49mFrontier
Fri 12/129:42 amDEN - SEA
Nonstop3h 11mFrontier
Deal found 10/30$96
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 12/1212:55 pmPDX - DEN
Nonstop2h 28mFrontier
Sun 1/119:52 amDEN - PDX
Nonstop3h 00mFrontier
Deal found 10/29$96
This Delta deal was found by Cheapflights users on 10/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/127:35 pmSEA - DEN
Nonstop2h 46mDelta
Mon 12/156:05 amDEN - SEA
Nonstop3h 10mDelta
Deal found 10/30$97
This Cheapflightsfares deal was found by Cheapflights users on 10/28. 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.
Fri 11/143:26 pmPDX - DEN
Nonstop2h 41mFrontier
Tue 11/1810:05 amDEN - PDX
Nonstop2h 51mFrontier
Deal found 10/28$97
This CheapOair deal was found by Cheapflights users on 10/29. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/121:37 pmSEA - DEN
Nonstop2h 53mFrontier
Sat 11/158:45 pmDEN - SEA
1 stop17h 52mFrontier
Deal found 10/29$98
This Frontier deal was found by Cheapflights users on 10/30. 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.
Thu 12/41:09 pmSEA - DEN
Nonstop2h 53mFrontier
Sun 12/79:05 pmDEN - SEA
1 stop12h 41mFrontier
Deal found 10/30$99
This CheapOair deal was found by Cheapflights users on 10/30. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/411:14 amPDX - DEN
1 stop12h 06mFrontier
Sun 12/79:56 amDEN - PDX
Nonstop3h 00mFrontier
Deal found 10/30$99
This Frontier deal was found by Cheapflights users on 10/30. 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 11/221:01 pmSEA - DEN
Nonstop2h 46mFrontier
Fri 12/510:51 amDEN - SEA
1 stop4h 54mFrontier
Deal found 10/30$100
This CheapOair deal was found by Cheapflights users on 10/30. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/221:01 pmSEA - DEN
Nonstop2h 46mFrontier
Fri 11/289:44 amDEN - SEA
Nonstop3h 12mFrontier
Deal found 10/30$101
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Wed 12/243:59 pmPDX - DEN
1 stop24h 40mFrontier
Thu 1/19:43 amDEN - PDX
Nonstop3h 00mFrontier
Deal found 10/28$101

Cheap flight deals from Washington to Denver

Keep the following information in mind while searching for Washington to Denver flight deals. Data was last updated October 30, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$92
(Kiwi.com)

One-way from

$28
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$188

Good round-trip deal

$133 or less

Good one-way deal

$85 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
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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 October 30, 2025.
Use the filters below to find and compare flights from Washington to Denver that are best for you.

Fly from

Washington

Fly to

Denver

Route

Depart

Return

Price

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Fri 12/12

7:35 pm-11:21 pm

Nonstop2h 46m

Denver Intl

Mon 12/15

6:05 am-8:15 am

Nonstop3h 10m

$97

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Thu 12/4

1:09 pm-5:02 pm

Nonstop2h 53m

Denver Intl

Sun 12/7

9:05 pm-8:46 am

1 stop12h 41m

$99

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 12/10

11:02 am-2:46 pm

Nonstop2h 44m

Denver Intl

Sat 12/13

6:59 pm-12:12 am

1 stop6h 13m

$123

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Fri 12/5

9:35 am-1:15 pm

Nonstop2h 40m

Denver Intl

Sun 12/7

7:55 am-3:25 pm

1 stop8h 30m

$123

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Tue 12/2

7:40 am-11:32 am

Nonstop2h 52m

Denver Intl

Wed 12/10

12:25 pm-2:33 pm

Nonstop3h 08m

$127

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Tue 11/11

1:37 pm-5:30 pm

Nonstop2h 53m

Denver Intl

Tue 11/18

9:58 am-12:07 pm

Nonstop3h 09m

$131

EverettDenver

PAE - DEN

PAEDEN

Everett Paine Field

Mon 12/15

8:42 pm-3:58 am

1 stop6h 16m

Denver Intl

Mon 12/29

9:36 am-11:50 am

Nonstop3h 14m

$134

PortlandDenver

PDX - DEN

PDXDEN

Portland

Wed 12/17

5:50 pm-9:28 pm

Nonstop2h 38m

Denver Intl

Tue 12/30

7:20 am-9:18 am

Nonstop2h 58m

$137

SpokaneDenver

GEG - DEN

GEGDEN

Spokane

Sun 1/11

5:15 am-11:57 am

1 stop5h 42m

Denver Intl

Thu 1/15

6:29 am-12:37 pm

1 stop7h 08m

$137

PortlandDenver

PDX - DEN

PDXDEN

Portland

Tue 1/6

5:50 pm-9:28 pm

Nonstop2h 38m

Denver Intl

Tue 1/13

11:49 am-1:45 pm

Nonstop2h 56m

$137

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 60 results
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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 $46). 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 October 30, 2025.

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 42% 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 December 16, 2024.

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

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 308 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, Frontier, and Alaska Airlines fly from State of Washington to Denver in about 2h 44m. The time it takes to get you to your destination is usually consistent. There are 1022 mi between State of Washington and Denver. Generally, flights for this route are nonstop.

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

    $59 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on Frontier and Delta, with prices starting from $64 and $69, 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 Spokane - 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 (88%), LATAM Airlines (88%), United Airlines( 87%).

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

    While on average a flight from State of Washington to Denver is generally $666, our data shows the cheapest flight currently is $64. When looking at the most popular route, (Seattle/Tacoma Intl - Denver Intl), you can expect to pay $53 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 $46). 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
Black Hawk
Westminster
Broomfield
Lakewood
Golden
Winter Park
Greeley
Lone Tree
Cripple Creek
Thornton
Silverthorne
Central City
Manitou Springs
Fort Morgan
Wheat Ridge
Brighton
Longmont
Idaho Springs
Parker
Sterling

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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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$61Average$156FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$87Average$370FlexibilityNo cancel feeOn-time85%
SouthwestCheapest$118Average$324FlexibilityNo cancel feeOn-time63%
DeltaCheapest$118Average$273FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$154Average$355FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$168Average$405FlexibilityNo cancel feeOn-time75%

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