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Seattle-Tacoma International Airport to Denver International Airport flight

Explore the cheapest one-way and round-trip flights from Seattle-Tacoma International Airport to Denver International Airport over the next 90 days, with one-way fares from £22 and round-trip from £66. Based on Trip.com's latest 7-day flight data.

    • Cheapest
      SEA 17:25
      2h 51m
      Direct
      DEN 21:16
      Seattle - Denver | Sat, Dec 26 | Frontier Airlines
      £22 £75
      71% off
      71% off
      £75 £22
    • SEA 16:27
      2h 48m
      Direct
      DEN 20:15
      Seattle - Denver | Mon, Nov 9 | Frontier Airlines
      £34 £251
      86% off
      86% off
      £251 £34
    • SEA 16:58
      2h 48m
      Direct
      DEN 20:46
      Seattle - Denver | Thu, Dec 3 | Frontier Airlines
      £44 £75
      41% off
      41% off
      £75 £44
    • SEA 16:58
      2h 48m
      Direct
      DEN 20:46
      Seattle - Denver | Wed, Dec 2 | Frontier Airlines
      £44
      82% off
      £251 £44
    • SEA 16:27
      2h 48m
      Direct
      DEN 20:15
      Seattle - Denver | Sun, Nov 15 | Frontier Airlines
      £45
      40% off
      £75 £45
    • SEA 16:58
      2h 50m
      Direct
      DEN 20:48
      Seattle - Denver | Thu, Dec 17 | Frontier Airlines
      £45
      40% off
      £75 £45
    • SEA 16:27
      2h 48m
      Direct
      DEN 20:15
      Seattle - Denver | Sat, Nov 14 | Frontier Airlines
      £45
      82% off
      £251 £45
    • SEA 14:07
      18h 24m
      1 stop
      DEN 09:31
      Seattle - Denver | Tue, Dec 8 | Frontier Airlines
      £52
      31% off
      £75 £52
    • SEA 14:07
      24h 7m
      1 stop
      DEN 15:14
      Seattle - Denver | Sat, Dec 5 | Frontier Airlines
      £52
      31% off
      £75 £52
    • SEA 13:00
      17h 25m
      1 stop
      DEN 14:00
      Seattle - Denver | Wed, Nov 4 | Normal Airline
      Find more flights
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    • Cheapest nonstop
      SEA 16:27
      2h 48m
      Direct
      DEN 20:15
      Seattle - Denver | Sat, Nov 14 | Frontier Airlines
      DEN 13:04
      3h 8m
      Direct
      SEA 15:12
      Denver - Seattle | Wed, Nov 18 | Frontier Airlines
      £66 £132
      50% off
      50% off
      £132 £66
    • SEA 16:58
      2h 50m
      Direct
      DEN 20:48
      Seattle - Denver | Sat, Dec 12 | Frontier Airlines
      DEN 13:32
      3h 11m
      Direct
      SEA 15:43
      Denver - Seattle | Wed, Dec 16 | Frontier Airlines
      £66 £132
      50% off
      50% off
      £132 £66
    • SEA 16:27
      2h 48m
      Direct
      DEN 20:15
      Seattle - Denver | Sat, Nov 7 | Frontier Airlines
      DEN 13:04
      3h 8m
      Direct
      SEA 15:12
      Denver - Seattle | Wed, Nov 11 | Frontier Airlines
      £66 £132
      50% off
      50% off
      £132 £66
    • SEA 16:58
      2h 48m
      Direct
      DEN 20:46
      Seattle - Denver | Wed, Dec 2 | Frontier Airlines
      DEN 13:32
      3h 11m
      Direct
      SEA 15:43
      Denver - Seattle | Sat, Dec 5 | Frontier Airlines
      £95
      28% off
      £132 £95
    • SEA 16:27
      2h 48m
      Direct
      DEN 20:15
      Seattle - Denver | Wed, Nov 18 | Frontier Airlines
      DEN 13:14
      3h 8m
      Direct
      SEA 15:22
      Denver - Seattle | Fri, Nov 20 | Frontier Airlines
      £100
      24% off
      £132 £100
    • SEA 17:25
      2h 51m
      Direct
      DEN 21:16
      Seattle - Denver | Wed, Dec 30 | Frontier Airlines
      DEN 06:45
      3h 14m
      Direct
      SEA 08:59
      Denver - Seattle | Mon, Jan 4 | Delta Air Lines
      £100
      24% off
      £132 £100
    • SEA 16:58
      2h 50m
      Direct
      DEN 20:48
      Seattle - Denver | Sat, Dec 5 | Frontier Airlines
      DEN 13:32
      3h 11m
      Direct
      SEA 15:43
      Denver - Seattle | Wed, Dec 9 | Frontier Airlines
      £102
      23% off
      £132 £102
    • SEA 10:06
      2h 52m
      Direct
      DEN 13:58
      Seattle - Denver | Sat, Nov 7 | Alaska Airlines
      DEN 13:04
      3h 8m
      Direct
      SEA 15:12
      Denver - Seattle | Wed, Nov 11 | Frontier Airlines
      £104
      21% off
      £132 £104
    • SEA 07:23
      2h 51m
      Direct
      DEN 11:14
      Seattle - Denver | Tue, Nov 3 | Alaska Airlines
      DEN 13:04
      3h 8m
      Direct
      SEA 15:12
      Denver - Seattle | Sat, Nov 7 | Frontier Airlines
      £104
      21% off
      £132 £104
    • SEA 13:00
      17h 25m
      1 stop
      DEN 14:00
      Seattle - Denver | Wed, Nov 4 | Normal Airline
      DEN 15:00
      6h
      Direct
      SEA 16:00
      Denver - Seattle | Fri, Nov 6 | Normal Airline
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    • Cheapest nonstop
      SEA 17:25
      2h 51m
      Direct
      DEN 21:16
      Seattle - Denver | Sat, Dec 26 | Frontier Airlines
      £22 £75
      71% off
      71% off
      £75 £22
    • SEA 16:27
      2h 48m
      Direct
      DEN 20:15
      Seattle - Denver | Mon, Nov 9 | Frontier Airlines
      £34 £251
      86% off
      86% off
      £251 £34
    • SEA 16:58
      2h 48m
      Direct
      DEN 20:46
      Seattle - Denver | Thu, Dec 3 | Frontier Airlines
      £44 £75
      41% off
      41% off
      £75 £44
    • SEA 16:58
      2h 48m
      Direct
      DEN 20:46
      Seattle - Denver | Wed, Dec 2 | Frontier Airlines
      £44
      82% off
      £251 £44
    • SEA 16:27
      2h 48m
      Direct
      DEN 20:15
      Seattle - Denver | Sun, Nov 15 | Frontier Airlines
      £45
      40% off
      £75 £45
    • SEA 16:58
      2h 50m
      Direct
      DEN 20:48
      Seattle - Denver | Thu, Dec 17 | Frontier Airlines
      £45
      40% off
      £75 £45
    • SEA 16:27
      2h 48m
      Direct
      DEN 20:15
      Seattle - Denver | Sat, Nov 14 | Frontier Airlines
      £45
      82% off
      £251 £45
    • SEA 19:57
      2h 49m
      Direct
      DEN 23:46
      Seattle - Denver | Sat, Dec 26 | Delta Air Lines
      £55
      27% off
      £75 £55
    • SEA 19:59
      2h 49m
      Direct
      DEN 23:48
      Seattle - Denver | Fri, Dec 4 | Delta Air Lines
      £58
      23% off
      £75 £58
    • SEA 13:00
      17h 25m
      1 stop
      DEN 14:00
      Seattle - Denver | Wed, Nov 4 | Normal Airline
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    • Cheapest nonstop
      SEA 16:27
      2h 48m
      Direct
      DEN 20:15
      Seattle - Denver | Mon, Nov 9 | Frontier Airlines
      £34 £251
      86% off
      86% off
      £251 £34
    • SEA 16:58
      2h 48m
      Direct
      DEN 20:46
      Seattle - Denver | Wed, Dec 2 | Frontier Airlines
      £44 £251
      82% off
      82% off
      £251 £44
    • SEA 16:27
      2h 48m
      Direct
      DEN 20:15
      Seattle - Denver | Sat, Nov 14 | Frontier Airlines
      £45 £251
      82% off
      82% off
      £251 £45
    • SEA 16:37
      2h 48m
      Direct
      DEN 20:25
      Seattle - Denver | Sat, Nov 21 | Frontier Airlines
      £58
      77% off
      £251 £58
    • SEA 16:27
      2h 48m
      Direct
      DEN 20:15
      Seattle - Denver | Wed, Nov 18 | Frontier Airlines
      £62
      75% off
      £251 £62
    • SEA 16:37
      2h 48m
      Direct
      DEN 20:25
      Seattle - Denver | Fri, Nov 20 | Frontier Airlines
      £67
      73% off
      £251 £67
    • SEA 13:37
      2h 49m
      Direct
      DEN 17:26
      Seattle - Denver | Mon, Dec 21 | Frontier Airlines
      £72
      71% off
      £251 £72
    • SEA 16:58
      2h 50m
      Direct
      DEN 20:48
      Seattle - Denver | Sat, Dec 5 | Frontier Airlines
      £74
      71% off
      £251 £74
    • SEA 07:25
      2h 45m
      Direct
      DEN 11:10
      Seattle - Denver | Tue, Dec 1 | Alaska Airlines
      £75
      70% off
      £251 £75
    • SEA 13:00
      17h 25m
      1 stop
      DEN 14:00
      Seattle - Denver | Wed, Nov 4 | Normal Airline
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    • Cheapest nonstop
      SEA 16:27
      2h 48m
      Direct
      DEN 20:15
      Seattle - Denver | Mon, Nov 9 | Frontier Airlines
      £34 £309
      89% off
      89% off
      £309 £34
    • SEA 16:27
      2h 48m
      Direct
      DEN 20:15
      Seattle - Denver | Sat, Nov 7 | Frontier Airlines
      £82 £309
      73% off
      73% off
      £309 £82
    • SEA 13:55
      2h 52m
      Direct
      DEN 17:47
      Seattle - Denver | Sat, Nov 7 | Delta Air Lines
      £98 £309
      68% off
      68% off
      £309 £98
    • SEA 16:27
      2h 48m
      Direct
      DEN 20:15
      Seattle - Denver | Wed, Nov 4 | Frontier Airlines
      £129
      57% off
      £309 £129
    • SEA 16:27
      2h 48m
      Direct
      DEN 20:15
      Seattle - Denver | Fri, Nov 6 | Frontier Airlines
      £141
      54% off
      £309 £141
    • SEA 13:59
      2h 40m
      Direct
      DEN 17:39
      Seattle - Denver | Tue, Nov 3 | Alaska Airlines
      £191
      38% off
      £309 £191
    • SEA 07:23
      2h 51m
      Direct
      DEN 11:14
      Seattle - Denver | Wed, Nov 4 | Alaska Airlines
      £192
      38% off
      £309 £192
    • SEA 07:23
      2h 51m
      Direct
      DEN 11:14
      Seattle - Denver | Sun, Nov 8 | Alaska Airlines
      £198
      36% off
      £309 £198
    • SEA 13:59
      2h 40m
      Direct
      DEN 17:39
      Seattle - Denver | Thu, Nov 5 | Alaska Airlines
      £244
      21% off
      £309 £244
    • SEA 13:00
      17h 25m
      1 stop
      DEN 14:00
      Seattle - Denver | Wed, Nov 4 | Normal Airline
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    • SEA 13:59
      2h 40m
      Direct
      DEN 17:39
      Seattle - Denver | Sat, Nov 14 | Alaska Airlines
      £76 £251
      70% off
      70% off
      £251 £76
    • SEA 07:25
      2h 45m
      Direct
      DEN 11:10
      Seattle - Denver | Tue, Dec 1 | Alaska Airlines
      £75 £251
      70% off
      70% off
      £251 £75
    • SEA 16:27
      2h 48m
      Direct
      DEN 20:15
      Seattle - Denver | Mon, Nov 9 | Frontier Airlines
      £34 £251
      86% off
      86% off
      £251 £34
    • SEA 16:58
      2h 48m
      Direct
      DEN 20:46
      Seattle - Denver | Thu, Dec 3 | Frontier Airlines
      £44
      41% off
      £75 £44
    • SEA 16:58
      2h 48m
      Direct
      DEN 20:46
      Seattle - Denver | Wed, Dec 2 | Frontier Airlines
      £44
      82% off
      £251 £44
    • SEA 16:27
      2h 48m
      Direct
      DEN 20:15
      Seattle - Denver | Sun, Nov 15 | Frontier Airlines
      £45
      40% off
      £75 £45
    • SEA 16:27
      2h 48m
      Direct
      DEN 20:15
      Seattle - Denver | Sat, Nov 14 | Frontier Airlines
      £45
      82% off
      £251 £45
    • SEA 16:37
      2h 48m
      Direct
      DEN 20:25
      Seattle - Denver | Sun, Nov 22 | Frontier Airlines
      £58
      23% off
      £75 £58
    • SEA 16:37
      2h 48m
      Direct
      DEN 20:25
      Seattle - Denver | Sat, Nov 21 | Frontier Airlines
      £58
      77% off
      £251 £58
    • SEA 13:00
      17h 25m
      1 stop
      DEN 14:00
      Seattle - Denver | Wed, Nov 4 | Normal Airline
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Displayed flight fares from Seattle to Denver 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 Seattle-Tacoma International Airport to Denver International Airport

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

The data is based on the past 12 months and shows the average one-way ticket prices from Seattle-Tacoma International Airport to Denver 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 Seattle-Tacoma International Airport to Denver International Airport are usually in January, with an average price of £86. It is best to avoid June, when the average price can reach £157.

£157
£122
£86
£51
    Cheapest
  • £111
    Nov
  • £109
    Dec
  • £86
    Jan
  • £117
    Feb
  • £110
    Mar
  • £124
    Apr
  • £107
    May
  • £157
    Jun
  • £153
    Jul
  • £139
    Aug
  • £132
    Sep
  • £153
    Oct

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

The data is based on the past 12 months and shows the average ticket prices from Seattle-Tacoma International Airport to Denver 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 Seattle-Tacoma International Airport to Denver International Airport is Tuesday, with average prices usually lower than other days. Avoid departing on Sunday as prices are typically highest on that day.

£140
£127
£113
£100
  • £133
    Mon
  • £113
    Tue
  • £113
    Wed
  • £129
    Thu
  • £139
    Fri
  • £125
    Sat
  • £140
    Sun

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

The cheapest airline flying from Seattle-Tacoma International Airport to Denver International Airport is Frontier Airlines (from £26) among 7 carriers operating this route. Based on Trip.com's latest 7-day flight data.

Frontier Airlines
From £26
Alaska Airlines
From £57
Delta Air Lines
From £58
American Airlines
From £66
United Airlines
From £97
Hahn Air
From £102
Sun Country Airlines
From £307

Find more flights and airlines

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

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

Flight info.
Departure
Arrival
Weekly Schedule

  1. AS421

    Seattle-Tacoma International Airport

    15:16

    SEA

    2h 40m

    18:56

    DEN

    S M T W T F S
    Search

  2. AS682

    Seattle-Tacoma International Airport

    07:23

    SEA

    2h 51m

    11:14

    DEN

    S M T W T F S
    Search

  3. F93406

    Seattle-Tacoma International Airport

    16:27

    SEA

    2h 50m

    20:17

    DEN

    S - T - T F -
    Search

  4. DL2851

    Seattle-Tacoma International Airport

    19:40

    SEA

    2h 48m

    23:28

    DEN

    S M T W T F S
    Search

  5. DL1165

    Seattle-Tacoma International Airport

    17:45

    SEA

    2h 6m

    Direct

    20:51

    SLC

    S M T W T F S
    Search

  6. DL1667

    Salt Lake City International Airport

    20:59

    SLC

    1h 34m

    Direct

    22:33

    DEN

    - - - - - - S

  7. F91178

    Seattle-Tacoma International Airport

    13:52

    SEA

    2h 45m

    Direct

    16:37

    LAX

    S M T W T F S
    Search

  8. F93156

    Los Angeles International Airport

    06:00

    LAX

    2h 31m

    Direct

    09:31

    DEN

    S M T W T F S

  9. DL2508

    Seattle-Tacoma International Airport

    07:15

    SEA

    2h 52m

    Direct

    10:07

    SAN

    S M T W T F S
    Search

  10. F94990

    San Diego International Airport

    15:04

    SAN

    2h 33m

    Direct

    18:37

    DEN

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

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

Flight distance 1,646.85km
Cheapest one-way ticket price £22
Cheapest return ticket price £66

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

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

    Seattle-Tacoma International Airport to Denver International Airport takes about 2 hours 26 minutes on average. Actual flight time may vary depending on route, weather and air traffic.
  • There are around 10 daily flights from Seattle-Tacoma International Airport (SEA) to Denver International Airport (DEN).
  • The earliest flight from Seattle-Tacoma International Airport to Denver International Airport departs at 05:00, and the last departs at 21:15, with about 27 flights per day. Flight times may change, so please check the latest departure and arrival times before you travel.
  • The route from Seattle-Tacoma International Airport (SEA) to Denver International Airport (DEN) is quite popular. Without considering departure times or holidays, tickets cost around £173 in November, the most expensive month to book this route.
  • Frontier Airlines is a very popular airline operating an average of 4338 flights per month.
  • One-way flights from Seattle-Tacoma International Airport to Denver International Airport currently start from £22, and round-trip fares start from £66. The current lowest fare is a Frontier Airlines flight departing on Sat, Dec 26; prices may vary depending on availability.
  • Yes. United Airlines, Alaska Airlines, Delta Air Lines and Frontier Airlines operate direct flights from Seattle-Tacoma International Airport to Denver International Airport, with an average flight time of 2 hours 28 minutes, and around 119 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 Seattle-Tacoma International Airport to Denver International Airport is £140. Prices may vary depending on the departure date, airline, and availability.
  • WestJet, Condor and Frontier Airlines are the most popular budget airlines flying from Seattle-Tacoma International Airport to Denver International Airport, with one-way fares starting from £22. Compare final prices carefully, as baggage, seat selection and payment fees may apply.
  • Seattle-Tacoma International Airport to Denver International Airport operates around 120 weekly flights, mainly by United Airlines and Alaska Airlines. Actual frequency may vary during holidays and seasonal schedule adjustments.
  • Enter Seattle-Tacoma International Airport and Denver 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 estimated lowest price 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 prices (incl. taxes, fuel surcharge, 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 were updated within the last 24 hours—even in real-time. The more popular the route, the more precise the data.

Change & Cancellation Policy

Trip.com displays flight cancellation and change policies for each flight ticket during the booking process, including fees and applicable conditions. Please check the following scenarios:
Voluntary cancellation/change:
To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy.
Cancellation/change due to a flight schedule change:
If the flight has been rescheduled 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 check the customer support pages.