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$77+ Cheap flights from Denver to Seattle (DEN - SEA)

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 6/14. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SEA
Apr 13 — Apr 201
Sun 4/13
Sun 4/20
1 adult, Economy
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Find cheap flights from Denver to Seattle with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

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Cheapflights Tip: The best prices from Denver Intl to Seattle/Tacoma Intl are usually found in October or September, booked 88 days in advance, depart on a Friday or Thursday and return on a Friday

Cheap flight deals from Denver to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) to Seattle (SEA). 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 April 8, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$123
(Frontier)

One-way from

$77
(Cheapflightsfares)

Popular in

July

Cheapest in

October

Average price

$205

Good round-trip deal

$232 or less

Good one-way deal

$118 or less
Provider with most accurate pricing for Denver Intl-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Denver Intl-Seattle/Tacoma Intl flights.
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From Denver Intl to Seattle/Tacoma Intl
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One-way flight from Denver Intl to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 5% potential increase in price ($12 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($3 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Price to beat on a round-trip flight from Denver Intl to Seattle/Tacoma Intl.
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Price to beat on a one-way flight from Denver Intl to Seattle/Tacoma Intl.
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Find flight deals from Denver to Seattle

Cheapest flights from Denver to Seattle
Explore the most affordable flight options available from Denver to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 8, 2025.

This Frontier deal was found by Cheapflights users on 4/7. 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 5/110:36 pmDEN - SEA
Nonstop3h 08mFrontier
Sat 5/106:00 amSEA - DEN
Nonstop2h 51mFrontier
Deal found 4/7$123
This Expedia deal was found by Cheapflights users on 4/7. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/69:43 pmDEN - SEA
Nonstop3h 06mMultiple Airlines
Tue 5/135:30 amSEA - DEN
1 stop4h 51mMultiple Airlines
Deal found 4/7$137
This Delta deal was found by Cheapflights users on 4/7. 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.
Wed 5/77:45 amDEN - SEA
Nonstop3h 04mDelta
Wed 5/72:00 pmSEA - DEN
Nonstop2h 50mDelta
Deal found 4/7$157
This Southwest deal was found by Cheapflights users on 4/8. 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.
Wed 5/78:20 amDEN - SEA
1 stop6h 40mSouthwest
Wed 5/147:35 amSEA - DEN
Nonstop2h 55mSouthwest
Deal found 4/8$167
This Alaska Airlines deal was found by Cheapflights users on 4/7. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/67:00 amDEN - SEA
Nonstop3h 00mAlaska Airlines
Tue 5/611:20 amSEA - DEN
2 stops8h 55mAlaska Airlines
Deal found 4/7$183
This United Airlines deal was found by Cheapflights users on 4/7. 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 5/67:16 pmDEN - SEA
1 stop6h 43mUnited Airlines
Tue 5/137:00 amSEA - DEN
1 stop6h 59mUnited Airlines
Deal found 4/7$192
This Hawaiian Airlines deal was found by Cheapflights users on 4/6. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/177:06 pmDEN - SEA
1 stop4h 53mHawaiian Airlines
Fri 7/258:17 pmSEA - DEN
Nonstop2h 42mHawaiian Airlines
Deal found 4/6$257

Cheapflights Fare Finder

Customize your flight search to find flights from Denver to Seattle 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 April 8, 2025.
Use the filters below to find and compare flights from Denver to Seattle that are best for you.

Fly from

Denver

Fly to

Seattle

Route

Depart

Return

Price

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Thu 5/1

10:36 pm-12:44 am

Nonstop3h 08m

Seattle/Tacoma Intl

Sat 5/10

6:00 am-9:51 am

Nonstop2h 51m

$123

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Tue 5/6

9:43 pm-11:49 pm

Nonstop3h 06m

Seattle/Tacoma Intl

Tue 5/13

5:30 am-11:21 am

1 stop4h 51m

$137

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Wed 5/7

7:45 am-9:49 am

Nonstop3h 04m

Seattle/Tacoma Intl

Wed 5/7

2:00 pm-5:50 pm

Nonstop2h 50m

$157

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Wed 5/7

4:05 pm-11:50 pm

1 stop8h 45m

Seattle/Tacoma Intl

Wed 5/14

2:50 pm-6:30 pm

Nonstop2h 40m

$167

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Tue 5/6

7:00 am-9:00 am

Nonstop3h 00m

Seattle/Tacoma Intl

Tue 5/6

11:20 am-9:15 pm

2 stops8h 55m

$183

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Tue 5/6

7:16 pm-12:59 am

1 stop6h 43m

Seattle/Tacoma Intl

Tue 5/13

7:00 am-2:59 pm

1 stop6h 59m

$192

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Mon 5/5

8:20 am-12:29 pm

1 stop5h 09m

Seattle/Tacoma Intl

Mon 5/12

8:20 pm-11:59 pm

Nonstop2h 39m

$217

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Sat 6/14

10:29 pm-12:34 am

Nonstop3h 05m

$77

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Sat 5/10

8:20 am-11:32 am

1 stop4h 12m

$88

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Fri 5/2

7:00 am-7:51 pm

1 stop13h 51m

$92

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/7

Showing 1-10 of 16 results
1
2

Compare providers for flights from Denver to Seattle

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Denver to Seattle in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
Kiwi.comPrice Accuracy3 starsTrust Score*2 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*3 stars
MytripPrice Accuracy3 starsTrust Score*3 stars
FlightnetworkPrice Accuracy-Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Denver-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Denver-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Denver-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Denver-Seattle flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Denver-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

The best insider tips for Denver to Seattle flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Denver to Seattle trip
Airlines
Frontier

Frontier offers extra comfort seats with 32” separation for a fee, ideal for taller passengers.


Frontier’s Board First option is available with a carry-on purchase or for elite members.

Read more about Frontierby Marisa Garcia
Alaska Airlines

Alaska Airlines offers Wi-Fi for a flat fee, ideal for business travelers needing connectivity.


Alaska’s MileagePlan awards miles based on distance, not ticket price, offering great value.

Read more about Alaska Airlinesby Robert Schrader
Airports
DEN

For a quick security experience, reserve a time online with DEN Reserve, available for general screening only.

Read more about DENby Emily Zemler
SEA

Use the Link light rail from SEA to downtown Seattle for an affordable and convenient 40-minute journey.

Read more about SEAby Brandon Schultz
Our travel experts
Marisa Garcia

Marisa Garcia

Expert on Frontier

Marisa Garcia

Marisa Garcia

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialized in airline interiors and regulations. Ten years ago, she pivoted to journalism. She shares her insights in leading aviation, travel, and business publications and on her site FlightChic.

Read more
Robert Schrader

Robert Schrader

Expert on Alaska Airlines

Robert Schrader

Robert Schrader

One of the web's original travel bloggers, Robert launched his first site Leave Your Daily Hell in 2009. Since then, he's expanded into destination niche sites (one each for Japan, Thailand and Taiwan), in addition to having written for the inflight magazines of Singapore Airlines and Korean Air. Overall, he's visited nearly 100 countries, and flies business as often as possible.

Read more
Emily Zemler

Emily Zemler

Expert on DEN

Emily Zemler

Emily Zemler

Emily is a freelance writer and book author based in London covering entertainment and travel. Her work has appeared in Los Angeles Times, Observer, and Conde Nast Traveler She has ventured to more than 40 countries and all seven continents, always in search of a great art museum. She has written extensively about hotels, luxury travel, and aviation.

Read more
Brandon Schultz

Brandon Schultz

Expert on SEA

Brandon Schultz

Brandon Schultz

Brandon Schultz is an award-winning food and travel writer based in New York City. His work has appeared in Forbes, AAA, Thrillist, Travel + Leisure, and The Daily Meal, among many others, and he is the author of 6 books, including 3 cookbooks.

Read more

Best time to book a flight from Denver to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Denver 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 Denver to Seattle

How far ahead should I book a flight from Denver to Seattle?

Use this chart to determine the optimal time to book a round-trip flight from Denver to Seattle. Price data was last updated on April 4, 2025.

To ensure you get the cheapest price possible for a flight from Denver to Seattle, you should look to book at least 88 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 Denver to Seattle?

Currently, January is the cheapest month in which you can book a flight from Denver to Seattle (average of $238). Flying from Denver to Seattle in July is currently the most expensive (average of $411). 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 DEN to SEA?

Find hourly flight availability from Denver to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 8, 2025.

When flying from Denver to Seattle, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 29% versus a flight at noon.

What is the cheapest day to fly from Denver to Seattle?

Use this chart to determine the cheapest time to fly round-trip from Denver to Seattle. Price data was last updated on March 30, 2025.

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

Weekly flight availability from Denver to Seattle

Explore weekly flight availability from Denver to Seattle. 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 April 8, 2025.

The most flights from DEN to SEA are scheduled on a Monday (43 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (16 on average).

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated April 8, 2025.
Read through reviews of airlines operating flights from Denver to Seattle, such as Alaska Airlines, Southwest and Delta. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,846 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Entertainment

7.1

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,846 reviews
Alaska Airlines
8.0
Very good
9,846 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Entertainment

7.1

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Southwest
8.0
Very good
4,277 reviews
Alaska Airlines
8.0
Very good
9,846 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Entertainment

7.1

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,901 reviews
Alaska Airlines
8.0
Very good
9,846 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Entertainment

7.1

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Hawaiian Airlines
7.9
Good
2,360 reviews
Alaska Airlines
8.0
Very good
9,846 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Entertainment

7.1

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,629 reviews
Alaska Airlines
8.0
Very good
9,846 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Entertainment

7.1

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Related info for your journey

Find useful and relevant information for your journey from Denver to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from Denver to Seattle?

    You will need to book a flight from Denver Intl to Seattle/Tacoma Intl if you want to fly from Denver to Seattle. At least 7 different airlines have flights from Denver Intl (DEN) to Seattle/Tacoma Intl (SEA) on a regular basis. There are 29 flights to Seattle from the Denver airport per day. If you manage to book one that is nonstop, then you can expect the flight time from DEN to SEA to be around 2h 57m.

  • How popular is this Denver to Seattle flight route?

    Within the past month, 231 users have taken a look at flights from Denver Intl to Seattle/Tacoma Intl.

  • What are the cheapest airlines flying from Denver to Seattle round-trip?

    Frontier, at $123, was found to be the cheapest airline from Denver to Seattle.Alternate airlines to your destination round-trip include Delta and United Airlines. Users have found that Frontier is 37% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Denver to Seattle one-way?

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $77. Users have also found prices from $88 and $109 on Alaska Airlines and United Airlines, respectively.

  • What are the most reliable airlines from Denver to Seattle?

    Before booking your flight to Seattle from Denver, check out the most reliable airlines to get you to your destination on time: Condor (94%), Japan Airlines (93%), Korean Air( 91%).

  • What are the cheapest flights from Denver to Seattle?

    Looking at all options, your cheapest flight can be booked for $77. While the most popular route (Denver Intl - Seattle/Tacoma Intl) can be booked for $119 on average our data indicates $789 when flying from Denver to Seattle.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Denver to Seattle 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 Denver to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Denver to Seattle (average of $238). Flying from Denver to Seattle in July is currently the most expensive (average of $411). 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
SeaTac
Tukwila
Tacoma
Lakewood
Renton
Lacey
Ocean Shores
Leavenworth
Federal Way
Olympia
Cle Elum
Centralia
Mukilteo
Aberdeen
Shoreline
Lynnwood
Shelton
Silverdale
Redmond
Monroe

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Alternative routes for Denver to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Denver to Seattle

Discover the top 6 airlines that operate flights from Denver to Seattle. 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 April 8, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$57Average$142FlexibilityNo cancel feeOn-time62%
DeltaCheapest$107Average$235FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$108Average$248FlexibilityNo cancel feeOn-time85%
SouthwestCheapest$119Average$208FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$143Average$270FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$148Average$302FlexibilityNo cancel feeOn-time69%

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