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Cheap flights from Denver to Seattle from £63

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 27/3. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SEA
25 Feb — 4 Mar1
1 adult

The best prices from Denver Intl to Seattle/Tacoma Intl are usually found in April or March, booked 25 days in advance, depart on a Thursday or Wednesday and return on a Tuesday

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 20 February 2025.

Round-trip from

£109

One-way from

£63

Popular in

December

Cheapest in

April

Average price

£141

Good one-way deal

£149 or less
Delta
  • Delta
  • 13/3-17/3
  • Nonstop
  • 6h 07m total
  • Denver to Seattle
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Delta
  • Delta
  • 27/3
  • 1 total stop
  • 6h 59m total
  • Denver to Seattle
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Highest demand for flights based on searches. 8% potential increase in price (£10 potential increase over avg. return price).
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Cheapest flight prices on average. 1% potential price decrease (£2 potential savings vs. average return price).
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Average for round-trip flights in February 2025
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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 20 February 2025.

Fri 11/419:50DEN - SEA
Nonstop3h 13mDelta
Mon 14/419:55SEA - DEN
Nonstop2h 45mDelta
Deal found 20/2£109
Sat 19/407:00DEN - SEA
Nonstop3h 07mAlaska Airlines
Sat 19/413:01SEA - DEN
Nonstop2h 39mAlaska Airlines
Deal found 19/2£152
Thu 20/322:50DEN - SEA
Nonstop3h 00mSouthwest
Tue 25/308:05SEA - DEN
2 stops8h 20mSouthwest
Deal found 19/2£152
Wed 19/321:00DEN - SEA
Nonstop3h 01mUnited Airlines
Mon 24/319:10SEA - DEN
Nonstop2h 45mUnited Airlines
Deal found 20/2£157
Wed 19/207:00DEN - SEA
Nonstop3h 16mHawaiian Airlines
Wed 19/212:34SEA - DEN
Nonstop2h 38mHawaiian Airlines
Deal found 19/2£318

Find flights from Denver to Seattle within your budget

Customise 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 858,174 searches. Data last updated 20 February 2025.

Fly from

Denver

Fly to

Seattle

Route

Depart

Return

Price

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Fri 11/4

19:50-22:03

Nonstop3h 13m

Seattle/Tacoma Intl

Mon 14/4

19:55-23:40

Nonstop2h 45m

£109

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Sat 19/4

07:00-09:07

Nonstop3h 07m

Seattle/Tacoma Intl

Sat 19/4

13:01-16:40

Nonstop2h 39m

£152

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Thu 20/3

22:50-00:50

Nonstop3h 00m

Seattle/Tacoma Intl

Tue 25/3

08:05-17:25

2 stops8h 20m

£152

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Wed 19/3

21:00-23:01

Nonstop3h 01m

Seattle/Tacoma Intl

Mon 24/3

19:10-22:55

Nonstop2h 45m

£157

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Thu 27/3

18:10-00:09

1 stop6h 59m

£63

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Tue 8/4

05:15-11:49

1 stop7h 34m

£83

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Sat 26/4

08:20-11:32

1 stop4h 12m

£86

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Wed 19/3

07:05-14:40

1 stop8h 35m

£94

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Tue 25/2

12:38-14:45

Nonstop3h 07m

£162

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Tue 8/7

15:57-21:49

2 stops6h 52m

£442

Flights are sorted by cheapest return flights first.

Deals found on 20/2

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 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.

Travel insights for flights from Denver to Seattle

Get recent, data-driven insights about flights from Denver to Seattle including ideal travel times, pricing trends, and more.

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

Use this chart to determine the optimal time to book a return flight from Denver to Seattle. Price data was last updated on 14 February 2025.

To ensure you get the cheapest price possible for a flight from Denver to Seattle, you should look to book at least 25 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 £622). Flying from Denver to Seattle in July is currently the most expensive (average of £946). 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 20 February 2025.

It’s typically best to fly out from Denver to Seattle at midday. Doing so could potentially save you 84% on the flight price compared to flying in the morning, which is usually more expensive.

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 20 February 2025.

The most flights from DEN to SEA are scheduled on a Monday (44 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (14 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 18.0 - 168.0 inches per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit Seattle when rainfall is around 18.0 mm.

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 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

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 20 February 2025.
Read reviews from past customers who have flown Southwest, Alaska Airlines and Delta from Denver to Seattle. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very Good
4,411 reviews
Check prices

Comfort

8.1

Boarding

8.2

Food

7.1

Crew

8.7

Entertainment

7.6

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Southwest
8.1
Very Good
4,411 reviews
Southwest
8.1
Very Good
4,411 reviews
Check prices

Comfort

8.1

Boarding

8.2

Food

7.1

Crew

8.7

Entertainment

7.6

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Alaska Airlines
8.0
Very Good
9,691 reviews
Southwest
8.1
Very Good
4,411 reviews
Check prices

Comfort

8.1

Boarding

8.2

Food

7.1

Crew

8.7

Entertainment

7.6

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Delta
8.0
Very Good
8,236 reviews
Southwest
8.1
Very Good
4,411 reviews
Check prices

Comfort

8.1

Boarding

8.2

Food

7.1

Crew

8.7

Entertainment

7.6

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Hawaiian Airlines
7.9
Good
2,317 reviews
Southwest
8.1
Very Good
4,411 reviews
Check prices

Comfort

8.1

Boarding

8.2

Food

7.1

Crew

8.7

Entertainment

7.6

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

United Airlines
7.4
Good
8,771 reviews
Southwest
8.1
Very Good
4,411 reviews
Check prices

Comfort

8.1

Boarding

8.2

Food

7.1

Crew

8.7

Entertainment

7.6

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

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 1 airline has flights from Denver Intl (DEN) to Seattle/Tacoma Intl (SEA) on a regular basis. There are 32 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 3h 06m.

  • How popular is this Denver to Seattle flight route?

    The Denver Intl to Seattle/Tacoma Intl flight path was viewed by 12 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    Flying on Delta is currently your cheapest option to Seattle, with prices starting at £109. Additional return tickets that might be worth considering are offered by Alaska Airlines and Southwest, with the lowest prices starting at £152 and £152, respectively. Delta is priced at 24% lower than the current average price of a flight leaving 3 months from now.

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

    The cheapest airline one-way is Delta, with whom users have recently found tickets for as low as £63. However, be on the lookout for offers from United Airlines and Alaska Airlines, as they are both options that can get you from Denver to Seattle for a low price.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Denver to Seattle on time: WestJet (88%), Icelandair (88%), Condor (88%).

  • What are the cheapest flights from Denver to Seattle?

    The cheapest flight price from Denver to Seattle is £77. On average you can expect to pay £218. The most popular route, (Denver Intl - Seattle/Tacoma Intl), can usually be booked for £119.

  • 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 holiday 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 £622). Flying from Denver to Seattle in July is currently the most expensive (average of £946). 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
Tacoma
Leavenworth
Bothell

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Top airline flying from Denver to Seattle

Discover the top airline 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 858,174 searches. Data last updated 20 February 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest£132Average£137FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Denver to Seattle?

Deals for Denver to Seattle flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Denver to Seattle?

Cheapflights helps you find that perfect flight to Seattle from Denver by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Denver to Seattle with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Denver to Seattle, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Denver to Seattle become cheaper?

Not ready to book yet? You can track prices for flights from Denver to Seattle on Cheapflights with our Price Alert feature and get notified when better prices are available.

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