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Denver International Airport to Seattle-Tacoma International Airport flight

Explore the cheapest one-way and round-trip flights from Denver International Airport to Seattle-Tacoma International Airport over the next 90 days, with one-way fares from £62 and round-trip from £115. Based on Trip.com's latest 7-day flight data.

    • Cheapest nonstop
      DEN 06:00
      3h 10m
      Direct
      SEA 08:10
      Denver - Seattle | Sun, Nov 15 | Delta Air Lines
      SEA 07:23
      2h 51m
      Direct
      DEN 11:14
      Seattle - Denver | Tue, Nov 17 | Alaska Airlines
      £115 £180
      36% off
      36% off
      £180 £115
    • DEN 13:32
      3h 11m
      Direct
      SEA 15:43
      Denver - Seattle | Fri, Dec 18 | Frontier Airlines
      SEA 16:58
      2h 50m
      Direct
      DEN 20:48
      Seattle - Denver | Mon, Dec 21 | Frontier Airlines
      £116 £180
      36% off
      36% off
      £180 £116
    • DEN 07:03
      3h 4m
      Direct
      SEA 09:07
      Denver - Seattle | Sun, Nov 15 | Alaska Airlines
      SEA 07:23
      2h 51m
      Direct
      DEN 11:14
      Seattle - Denver | Tue, Nov 17 | Alaska Airlines
      £118 £180
      34% off
      34% off
      £180 £118
    • DEN 13:32
      3h 8m
      Direct
      SEA 15:40
      Denver - Seattle | Sun, Dec 13 | Frontier Airlines
      SEA 16:58
      2h 50m
      Direct
      DEN 20:48
      Seattle - Denver | Wed, Dec 16 | Frontier Airlines
      £119
      34% off
      £180 £119
    • DEN 13:32
      3h 11m
      Direct
      SEA 15:43
      Denver - Seattle | Mon, Dec 14 | Frontier Airlines
      SEA 16:58
      2h 50m
      Direct
      DEN 20:48
      Seattle - Denver | Mon, Dec 21 | Frontier Airlines
      £124
      31% off
      £180 £124
    • DEN 13:32
      3h 11m
      Direct
      SEA 15:43
      Denver - Seattle | Mon, Dec 21 | Frontier Airlines
      SEA 16:58
      2h 50m
      Direct
      DEN 20:48
      Seattle - Denver | Fri, Dec 25 | Frontier Airlines
      £124
      31% off
      £180 £124
    • DEN 13:32
      3h 8m
      Direct
      SEA 15:40
      Denver - Seattle | Fri, Dec 11 | Frontier Airlines
      SEA 16:58
      2h 50m
      Direct
      DEN 20:48
      Seattle - Denver | Mon, Dec 14 | Frontier Airlines
      £127
      28% off
      £180 £127
    • DEN 13:32
      3h 11m
      Direct
      SEA 15:43
      Denver - Seattle | Sun, Dec 20 | Frontier Airlines
      SEA 16:58
      2h 50m
      Direct
      DEN 20:48
      Seattle - Denver | Fri, Dec 25 | Frontier Airlines
      £131
      27% off
      £180 £131
    • DEN 13:32
      3h 11m
      Direct
      SEA 15:43
      Denver - Seattle | Wed, Dec 16 | Frontier Airlines
      SEA 16:58
      2h 50m
      Direct
      DEN 20:48
      Seattle - Denver | Mon, Dec 21 | Frontier Airlines
      £131
      27% off
      £180 £131
    • DEN 13:00
      17h 25m
      1 stop
      SEA 14:00
      Denver - Seattle | Wed, Nov 11 | Normal Airline
      SEA 15:00
      6h
      Direct
      DEN 16:00
      Seattle - Denver | Fri, Nov 13 | Normal Airline
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    • Cheapest
      DEN 13:32
      3h 11m
      Direct
      SEA 15:43
      Denver - Seattle | Wed, Dec 9 | Frontier Airlines
      £62 £107
      42% off
      42% off
      £107 £62
    • DEN 13:32
      3h 11m
      Direct
      SEA 15:43
      Denver - Seattle | Sat, Dec 5 | Frontier Airlines
      £63 £107
      41% off
      41% off
      £107 £63
    • DEN 13:32
      3h 8m
      Direct
      SEA 15:40
      Denver - Seattle | Fri, Dec 4 | Frontier Airlines
      £66 £107
      38% off
      38% off
      £107 £66
    • DEN 13:14
      3h 8m
      Direct
      SEA 15:22
      Denver - Seattle | Tue, Nov 24 | Frontier Airlines
      £67
      37% off
      £107 £67
    • DEN 10:08
      3h 14m
      Direct
      SEA 12:22
      Denver - Seattle | Fri, Dec 25 | Frontier Airlines
      £70
      35% off
      £107 £70
    • DEN 13:03
      3h 11m
      Direct
      SEA 15:14
      Denver - Seattle | Fri, Jan 8 | Frontier Airlines
      £72
      33% off
      £107 £72
    • DEN 06:42
      6h 55m
      1 stop
      SEA 12:37
      Denver - Seattle | Wed, Nov 25 | Frontier Airlines
      £74
      31% off
      £107 £74
    • DEN 06:01
      3h 10m
      Direct
      SEA 08:11
      Denver - Seattle | Tue, Nov 24 | Alaska Airlines
      £74
      31% off
      £107 £74
    • DEN 13:32
      3h 11m
      Direct
      SEA 15:43
      Denver - Seattle | Mon, Dec 7 | Frontier Airlines
      £74
      60% off
      £183 £74
    • DEN 13:00
      17h 25m
      1 stop
      SEA 14:00
      Denver - Seattle | Wed, Nov 11 | Normal Airline
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    • Cheapest nonstop
      DEN 13:32
      3h 11m
      Direct
      SEA 15:43
      Denver - Seattle | Wed, Dec 9 | Frontier Airlines
      £62 £107
      42% off
      42% off
      £107 £62
    • DEN 13:32
      3h 11m
      Direct
      SEA 15:43
      Denver - Seattle | Sat, Dec 5 | Frontier Airlines
      £63 £107
      41% off
      41% off
      £107 £63
    • DEN 13:32
      3h 8m
      Direct
      SEA 15:40
      Denver - Seattle | Fri, Dec 4 | Frontier Airlines
      £66 £107
      38% off
      38% off
      £107 £66
    • DEN 13:14
      3h 8m
      Direct
      SEA 15:22
      Denver - Seattle | Tue, Nov 24 | Frontier Airlines
      £67
      37% off
      £107 £67
    • DEN 10:08
      3h 14m
      Direct
      SEA 12:22
      Denver - Seattle | Fri, Dec 25 | Frontier Airlines
      £70
      35% off
      £107 £70
    • DEN 13:03
      3h 11m
      Direct
      SEA 15:14
      Denver - Seattle | Fri, Jan 8 | Frontier Airlines
      £72
      33% off
      £107 £72
    • DEN 06:01
      3h 10m
      Direct
      SEA 08:11
      Denver - Seattle | Tue, Nov 24 | Alaska Airlines
      £74
      31% off
      £107 £74
    • DEN 13:32
      3h 11m
      Direct
      SEA 15:43
      Denver - Seattle | Mon, Dec 7 | Frontier Airlines
      £74
      60% off
      £183 £74
    • DEN 15:05
      3h 2m
      Direct
      SEA 17:07
      Denver - Seattle | Wed, Jan 6 | Alaska Airlines
      £76
      28% off
      £107 £76
    • DEN 13:00
      17h 25m
      1 stop
      SEA 14:00
      Denver - Seattle | Wed, Nov 11 | Normal Airline
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    • Cheapest nonstop
      DEN 13:32
      3h 11m
      Direct
      SEA 15:43
      Denver - Seattle | Wed, Dec 9 | Frontier Airlines
      £62 £183
      66% off
      66% off
      £183 £62
    • DEN 13:32
      3h 11m
      Direct
      SEA 15:43
      Denver - Seattle | Sat, Dec 5 | Frontier Airlines
      £63 £183
      66% off
      66% off
      £183 £63
    • DEN 13:14
      3h 8m
      Direct
      SEA 15:22
      Denver - Seattle | Tue, Nov 24 | Frontier Airlines
      £67 £183
      63% off
      63% off
      £183 £67
    • DEN 13:32
      3h 11m
      Direct
      SEA 15:43
      Denver - Seattle | Mon, Dec 7 | Frontier Airlines
      £74
      60% off
      £183 £74
    • DEN 13:14
      3h 8m
      Direct
      SEA 15:22
      Denver - Seattle | Thu, Nov 26 | Frontier Airlines
      £79
      56% off
      £183 £79
    • DEN 13:14
      3h 8m
      Direct
      SEA 15:22
      Denver - Seattle | Wed, Nov 25 | Frontier Airlines
      £81
      56% off
      £183 £81
    • DEN 21:55
      3h 4m
      Direct
      SEA 23:59
      Denver - Seattle | Wed, Nov 25 | Alaska Airlines
      £82
      55% off
      £183 £82
    • DEN 13:32
      3h 8m
      Direct
      SEA 15:40
      Denver - Seattle | Wed, Dec 2 | Frontier Airlines
      £84
      54% off
      £183 £84
    • DEN 06:05
      3h 18m
      Direct
      SEA 08:23
      Denver - Seattle | Sun, Dec 20 | Delta Air Lines
      £103
      44% off
      £183 £103
    • DEN 13:00
      17h 25m
      1 stop
      SEA 14:00
      Denver - Seattle | Wed, Nov 11 | Normal Airline
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    • Cheapest nonstop
      DEN 07:03
      3h 4m
      Direct
      SEA 09:07
      Denver - Seattle | Sun, Nov 15 | Alaska Airlines
      £133 £299
      56% off
      56% off
      £299 £133
    • DEN 13:04
      3h 8m
      Direct
      SEA 15:12
      Denver - Seattle | Wed, Nov 11 | Frontier Airlines
      £139 £299
      54% off
      54% off
      £299 £139
    • DEN 13:04
      3h 8m
      Direct
      SEA 15:12
      Denver - Seattle | Mon, Nov 16 | Frontier Airlines
      £140 £299
      53% off
      53% off
      £299 £140
    • DEN 13:04
      3h 8m
      Direct
      SEA 15:12
      Denver - Seattle | Fri, Nov 13 | Frontier Airlines
      £145
      52% off
      £299 £145
    • DEN 07:03
      3h 4m
      Direct
      SEA 09:07
      Denver - Seattle | Wed, Nov 11 | Alaska Airlines
      £194
      35% off
      £299 £194
    • DEN 12:12
      3h 3m
      Direct
      SEA 14:15
      Denver - Seattle | Tue, Nov 10 | Alaska Airlines
      £218
      27% off
      £299 £218
    • DEN 13:00
      17h 25m
      1 stop
      SEA 14:00
      Denver - Seattle | Wed, Nov 11 | Normal Airline
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    • DEN 15:05
      3h 2m
      Direct
      SEA 17:07
      Denver - Seattle | Wed, Jan 6 | Alaska Airlines
      £76 £107
      28% off
      28% off
      £107 £76
    • DEN 16:05
      3h 2m
      Direct
      SEA 18:07
      Denver - Seattle | Thu, Dec 17 | United Airlines
      £154 £379
      59% off
      59% off
      £379 £154
    • DEN 16:05
      3h 2m
      Direct
      SEA 18:07
      Denver - Seattle | Fri, Dec 18 | United Airlines
      £178 £379
      53% off
      53% off
      £379 £178
    • DEN 16:05
      3h 2m
      Direct
      SEA 18:07
      Denver - Seattle | Sun, Dec 20 | United Airlines
      £181
      52% off
      £379 £181
    • DEN 15:25
      3h 2m
      Direct
      SEA 17:27
      Denver - Seattle | Sun, Nov 15 | Alaska Airlines
      £185
      51% off
      £379 £185
    • DEN 16:05
      3h 2m
      Direct
      SEA 18:07
      Denver - Seattle | Tue, Dec 22 | United Airlines
      £191
      50% off
      £379 £191
    • DEN 16:05
      3h 2m
      Direct
      SEA 18:07
      Denver - Seattle | Fri, Jan 1 | United Airlines
      £212
      44% off
      £379 £212
    • DEN 16:02
      3h 2m
      Direct
      SEA 18:04
      Denver - Seattle | Sat, Jan 2 | United Airlines
      £253
      33% off
      £379 £253
    • DEN 16:05
      3h 2m
      Direct
      SEA 18:07
      Denver - Seattle | Mon, Dec 28 | United Airlines
      £255
      33% off
      £379 £255
    • DEN 13:00
      17h 25m
      1 stop
      SEA 14:00
      Denver - Seattle | Wed, Nov 11 | Normal Airline
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Displayed flight fares from Denver to Seattle are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Trip.com Price Insights: Flights from Denver International Airport to Seattle-Tacoma International Airport

What is the cheapest month to fly from Denver International Airport to Seattle-Tacoma International Airport?

The data is based on the past 12 months and shows the average one-way ticket prices from Denver International Airport to Seattle-Tacoma International Airport for each month in the Trip.com database.

Based on Trip.com's data from the past 12 months, the cheapest one-way flights from Denver International Airport to Seattle-Tacoma International Airport are usually in April, with an average price of £91. It is best to avoid October, when the average price can reach £160.

£160
£126
£91
£57
    Cheapest
  • £106
    Nov
  • £112
    Dec
  • £101
    Jan
  • £108
    Feb
  • £112
    Mar
  • £91
    Apr
  • £120
    May
  • £143
    Jun
  • £133
    Jul
  • £118
    Aug
  • £130
    Sep
  • £160
    Oct

What is the cheapest day of the week to fly from Denver International Airport to Seattle-Tacoma International Airport?

The data is based on the past 12 months and shows the average ticket prices from Denver International Airport to Seattle-Tacoma International Airport for each day of the week in the Trip.com database.

Based on Trip.com's data from the past 12 months, the cheapest departure day from Denver International Airport to Seattle-Tacoma International Airport is Wednesday, with average prices usually lower than other days. Avoid departing on Thursday as prices are typically highest on that day.

£132
£112
£92
£72
    Cheapest
  • £123
    Mon
  • £100
    Tue
  • £92
    Wed
  • £132
    Thu
  • £129
    Fri
  • £125
    Sat
  • £129
    Sun

Which airline offers the cheapest flights from Denver International Airport to Seattle-Tacoma International Airport?

The cheapest airline flying from Denver International Airport to Seattle-Tacoma International Airport is Frontier Airlines (from £41) among 7 carriers operating this route. Based on Trip.com's latest 7-day flight data.

Frontier Airlines
From £41
Delta Air Lines
From £59
Alaska Airlines
From £74
American Airlines
From £85
United Airlines
From £123
Sun Country Airlines
From £156
Hahn Air
From £258

Find more flights and airlines

What is the flight schedule from Denver International Airport to Seattle-Tacoma International Airport?

Check the schedule for flights from Denver to Seattle and find the flight that best matches your travel plans.

Flight info.
Departure
Arrival
Weekly Schedule

  1. AS493

    Denver International Airport

    15:25

    DEN

    3h 2m

    17:27

    SEA

    S M T W T F S
    Search

  2. DL2543

    Denver International Airport

    18:42

    DEN

    3h 6m

    20:48

    SEA

    S M T W T F S
    Search

  3. AS317

    Denver International Airport

    07:03

    DEN

    3h 4m

    09:07

    SEA

    S M T W T F S
    Search

  4. DL1731

    Denver International Airport

    06:45

    DEN

    3h 14m

    08:59

    SEA

    S M T W T F S
    Search

  5. F92341

    Denver International Airport

    14:48

    DEN

    2h 43m

    Direct

    16:31

    LAX

    S M T W T F S
    Search

  6. F91177

    Los Angeles International Airport

    06:00

    LAX

    3h 3m

    Direct

    09:03

    SEA

    S M T W T F S

  7. DL2362

    Denver International Airport

    15:40

    DEN

    1h 35m

    Direct

    17:15

    SLC

    S M T W T F S
    Search

  8. DL2817

    Salt Lake City International Airport

    15:35

    SLC

    2h 18m

    Direct

    16:53

    SEA

    S M T W T F S

  9. F94967

    Denver International Airport

    13:19

    DEN

    2h 5m

    Direct

    14:24

    LAS

    S M T W T F S
    Search

  10. F92407

    Harry Reid International Airport

    07:35

    LAS

    3h 3m

    Direct

    10:38

    SEA

    S - - W T - S
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About Denver International Airport and Seattle-Tacoma International Airport

Learn about Denver International Airport (DEN) and Seattle-Tacoma International Airport (SEA) — including location, terminals, transportation, and travel tips.

Flight distance 1,646.85km
Cheapest one-way ticket price £62
Cheapest return ticket price £100

FAQs for Denver International Airport to Seattle-Tacoma International Airport Flights

  • How long is the flight from Denver International Airport to Seattle-Tacoma International Airport?

    Denver International Airport to Seattle-Tacoma International Airport takes about 2 hours 34 minutes on average. Actual flight time may vary depending on route, weather and air traffic.
  • There are around 10 daily flights from Denver International Airport (DEN) to Seattle-Tacoma International Airport (SEA).
  • The earliest flight from Denver International Airport to Seattle-Tacoma International Airport departs at 06:00, and the last departs at 21:07, with about 34 flights per day. Flight times may change, so please check the latest departure and arrival times before you travel.
  • The route from Denver International Airport (DEN) to Seattle-Tacoma International Airport (SEA) is quite popular. Without considering departure times or holidays, tickets cost around £223 in November, the most expensive month to book this route.
    • The distance from Seattle-Tacoma International Airport to downtown is about 17km, by taxi about 30 minutes.
  • Frontier Airlines is a very popular airline operating an average of 4518 flights per month.
  • One-way flights from Denver International Airport to Seattle-Tacoma International Airport currently start from £62, and round-trip fares start from £100. The current lowest fare is a Frontier Airlines flight departing on Wed, Dec 9; prices may vary depending on availability.
  • Yes. United Airlines, Alaska Airlines, Delta Air Lines and Frontier Airlines operate direct flights from Denver International Airport to Seattle-Tacoma International Airport, with an average flight time of 2 hours 35 minutes, and around 111 weekly flights. Actual flight frequency may vary by season.
  • Based on Trip.com flight data for departures within the next 30 days with at most one stop, the average one-way price from Denver International Airport to Seattle-Tacoma International Airport is £146. Prices may vary depending on the departure date, airline, and availability.
  • Condor, Frontier Airlines and Volaris are the most popular budget airlines flying from Denver International Airport to Seattle-Tacoma International Airport, with one-way fares starting from £62. Compare final prices carefully, as baggage, seat selection and payment fees may apply.
  • Denver International Airport to Seattle-Tacoma International Airport operates around 109 weekly flights, mainly by United Airlines and Alaska Airlines. Actual frequency may vary during holidays and seasonal schedule adjustments.
  • Enter Denver International Airport and Seattle-Tacoma International Airport, select your departure date and number of passengers, then compare flights by price, flight duration, and baggage allowance. Once you've chosen a fare, review the change and refund rules, fill in passenger details, and pay to receive your booking confirmation.

Find Cheap Flights with Trip.com

Note: Prices shown on this page are the estimated lowest prices and include all taxes and fees found in the last 24 hours.

Book with no extra fees

Prices displayed on this page are all-inclusive (including taxes, fuel surcharges, civil aviation development fund, etc.), with all fees confirmed before payment. Fees for luggage, meals, Wi-Fi, or other additional services are also included as shown in the flight cards.

Real-time pricing updates

Prices, availability, and travel information on this page have been updated within the last 24 hours—sometimes even in real time. The more popular the route, the more accurate the data.

Change & Cancellation Policy

Trip.com shows the cancellation and change policies for each flight ticket during the booking process, including any fees and applicable conditions. Please check the following scenarios:
Voluntary cancellation/change:
To request a change or cancellation, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and flight segment, and submit your request. Please note that additional charges may apply according to the airline's ticket policy.
Cancellation/change due to a flight schedule change:
If the flight schedule has changed and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please visit the customer support pages.