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Seattle Tacoma Intl. Airport to Denver International Airport flight

Explore the cheapest one-way and round-trip flights from Seattle Tacoma Intl. Airport to Denver International Airport over the next 90 days, with one-way fares from £18 and round-trip from £65. Based on Trip.com's latest 7-day flight data.

      • Cheapest nonstop
        SEA 4:27 PM
        2h 50m
        Nonstop
        DEN 8:17 PM
        Seattle - Denver | Wed, Oct 21 | Frontier Airlines
        DEN 1:07 PM
        3h 5m
        Nonstop
        SEA 3:12 PM
        Denver - Seattle | Sat, Oct 24 | Frontier Airlines
        £65 £138
        53% off
        53% off
        £138 £65
      • SEA 4:27 PM
        2h 50m
        Nonstop
        DEN 8:17 PM
        Seattle - Denver | Sat, Oct 24 | Frontier Airlines
        DEN 1:04 PM
        3h 8m
        Nonstop
        SEA 3:12 PM
        Denver - Seattle | Wed, Oct 28 | Frontier Airlines
        £66 £138
        52% off
        52% off
        £138 £66
      • SEA 4:27 PM
        2h 48m
        Nonstop
        DEN 8:15 PM
        Seattle - Denver | Sat, Nov 14 | Frontier Airlines
        DEN 1:04 PM
        3h 8m
        Nonstop
        SEA 3:12 PM
        Denver - Seattle | Wed, Nov 18 | Frontier Airlines
        £66 £138
        52% off
        52% off
        £138 £66
      • SEA 4:27 PM
        2h 48m
        Nonstop
        DEN 8:15 PM
        Seattle - Denver | Wed, Nov 4 | Frontier Airlines
        DEN 1:04 PM
        3h 8m
        Nonstop
        SEA 3:12 PM
        Denver - Seattle | Sat, Nov 7 | Frontier Airlines
        £66
        52% off
        £138 £66
      • SEA 4:27 PM
        2h 48m
        Nonstop
        DEN 8:15 PM
        Seattle - Denver | Sat, Nov 7 | Frontier Airlines
        DEN 1:04 PM
        3h 8m
        Nonstop
        SEA 3:12 PM
        Denver - Seattle | Wed, Nov 11 | Frontier Airlines
        £66
        52% off
        £138 £66
      • SEA 4:27 PM
        2h 48m
        Nonstop
        DEN 8:15 PM
        Seattle - Denver | Wed, Oct 28 | Frontier Airlines
        DEN 1:04 PM
        3h 8m
        Nonstop
        SEA 3:12 PM
        Denver - Seattle | Sat, Oct 31 | Frontier Airlines
        £66
        52% off
        £138 £66
      • SEA 4:27 PM
        2h 50m
        Nonstop
        DEN 8:17 PM
        Seattle - Denver | Fri, Oct 23 | Frontier Airlines
        DEN 7:07 AM
        3h 3m
        Nonstop
        SEA 9:10 AM
        Denver - Seattle | Sun, Oct 25 | Alaska Airlines
        £78
        43% off
        £138 £78
      • SEA 4:27 PM
        2h 50m
        Nonstop
        DEN 8:17 PM
        Seattle - Denver | Tue, Oct 20 | Frontier Airlines
        DEN 1:07 PM
        3h 5m
        Nonstop
        SEA 3:12 PM
        Denver - Seattle | Sat, Oct 24 | Frontier Airlines
        £79
        43% off
        £138 £79
      • SEA 4:27 PM
        2h 48m
        Nonstop
        DEN 8:15 PM
        Seattle - Denver | Sat, Oct 31 | Frontier Airlines
        DEN 1:04 PM
        3h 8m
        Nonstop
        SEA 3:12 PM
        Denver - Seattle | Wed, Nov 4 | Frontier Airlines
        £80
        42% off
        £138 £80
      • SEA 4:27 PM
        2h 48m
        Nonstop
        DEN 8:15 PM
        Seattle - Denver | Fri, Nov 13 | Frontier Airlines
        DEN 6:00 AM
        3h 12m
        Nonstop
        SEA 8:12 AM
        Denver - Seattle | Sun, Nov 15 | Delta Air Lines
        £85
        38% off
        £138 £85
      • SEA 4:27 PM
        2h 50m
        Nonstop
        DEN 8:17 PM
        Seattle - Denver | Sat, Oct 10 | Frontier Airlines
        DEN 1:07 PM
        3h 5m
        Nonstop
        SEA 3:12 PM
        Denver - Seattle | Wed, Oct 14 | Frontier Airlines
        £93
        33% off
        £138 £93
      • SEA 4:58 PM
        2h 48m
        Nonstop
        DEN 8:46 PM
        Seattle - Denver | Wed, Dec 2 | Frontier Airlines
        DEN 1:32 PM
        3h 11m
        Nonstop
        SEA 3:43 PM
        Denver - Seattle | Sat, Dec 5 | Frontier Airlines
        £96
        30% off
        £138 £96
      • SEA 1:00 PM
        17h 25m
        1 stop
        DEN 2:00 PM
        Seattle - Denver | Mon, Oct 5 | Normal Airline
        DEN 3:00 PM
        6h
        Nonstop
        SEA 4:00 PM
        Denver - Seattle | Wed, Oct 7 | Normal Airline
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      • Cheapest nonstop
        SEA 4:27 PM
        2h 48m
        Nonstop
        DEN 8:15 PM
        Seattle - Denver | Sun, Nov 8 | Frontier Airlines
        £18 £99
        82% off
        82% off
        £99 £18
      • SEA 4:27 PM
        2h 48m
        Nonstop
        DEN 8:15 PM
        Seattle - Denver | Tue, Nov 3 | Frontier Airlines
        £19 £99
        81% off
        81% off
        £99 £19
      • SEA 7:41 PM
        2h 53m
        Nonstop
        DEN 11:34 PM
        Seattle - Denver | Wed, Oct 14 | Frontier Airlines
        £51 £99
        48% off
        48% off
        £99 £51
      • SEA 7:23 AM
        2h 51m
        Nonstop
        DEN 11:14 AM
        Seattle - Denver | Tue, Nov 3 | Alaska Airlines
        £57
        42% off
        £99 £57
      • SEA 8:00 PM
        2h 55m
        Nonstop
        DEN 11:55 PM
        Seattle - Denver | Tue, Nov 3 | Delta Air Lines
        £59
        40% off
        £99 £59
      • SEA 8:00 PM
        2h 55m
        Nonstop
        DEN 11:55 PM
        Seattle - Denver | Sun, Nov 8 | Delta Air Lines
        £59
        40% off
        £99 £59
      • SEA 4:27 PM
        2h 50m
        Nonstop
        DEN 8:17 PM
        Seattle - Denver | Fri, Oct 9 | Frontier Airlines
        £63
        36% off
        £99 £63
      • SEA 4:27 PM
        2h 50m
        Nonstop
        DEN 8:17 PM
        Seattle - Denver | Sat, Oct 17 | Frontier Airlines
        £69
        30% off
        £99 £69
      • SEA 8:09 PM
        12h 36m
        1 stop
        DEN 9:45 AM
        Seattle - Denver | Wed, Nov 18 | Frontier Airlines
        £54
        45% off
        £99 £54
      • SEA 8:00 PM
        18h 11m
        1 stop
        DEN 3:11 PM
        Seattle - Denver | Tue, Oct 27 | Frontier Airlines
        £66
        33% off
        £99 £66
      • SEA 1:35 PM
        7h 34m
        1 stop
        DEN 10:09 PM
        Seattle - Denver | Tue, Nov 3 | American Airlines
        £67
        32% off
        £99 £67
      • SEA 8:09 PM
        20h 54m
        1 stop
        DEN 6:03 PM
        Seattle - Denver | Thu, Nov 19 | Frontier Airlines
        £68
        31% off
        £99 £68
      • SEA 1:00 PM
        17h 25m
        1 stop
        DEN 2:00 PM
        Seattle - Denver | Mon, Oct 5 | Normal Airline
        Find more flights
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Displayed flight fares from Seattle Tacoma Intl. Airport to Denver International Airport 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 Intl. Airport to Denver International Airport

What is the cheapest month for one-way flights from Seattle Tacoma Intl. Airport to Denver International Airport?

Data is based on average one-way flight prices from Seattle Tacoma Intl. Airport to Denver International Airport in Trip.com's database over the past 12 months.

Based on Trip.com’s data from the past 12 months, if you’re looking for a low-cost one-way ticket from Seattle Tacoma Intl. Airport to Denver International Airport, the best time to buy is in September, with an average price of £80. You’ll want to avoid June, when the average price can reach as high as £158.

£158
£119
£80
£41
  • £80
    Sep
  • £92
    Oct
  • £117
    Nov
  • £109
    Dec
  • £86
    Jan
  • £118
    Feb
  • £110
    Mar
  • £125
    Apr
  • £107
    May
  • £158
    Jun
  • £153
    Jul
  • £139
    Aug

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

The data is based on the past 12 months and shows the average ticket prices from Seattle Tacoma Intl. 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 day to depart from Seattle Tacoma Intl. Airport to Denver International Airport is Tuesday, with average fares typically lower than other days. You’ll want to avoid flying on Sunday, as ticket prices are usually the highest that day.

£137
£120
£102
£85
  • £122
    Mon
  • £102
    Tue
  • £113
    Wed
  • £127
    Thu
  • £134
    Fri
  • £122
    Sat
  • £137
    Sun

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

The cheapest airline flying from Seattle Tacoma Intl. Airport to Denver International Airport is Frontier Airlines (from £18) among 7 carriers operating this route. Based on Trip.com's latest 7-day flight data.

Frontier Airlines
From £18
Alaska Airlines
From £57
Delta Air Lines
From £59
American Airlines
From £67
United Airlines
From £91
Hahn Air
From £114
Sun Country Airlines
From £141

Find more flights and airlines

What is the flight schedule from Seattle Tacoma Intl. 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. F93406

    Seattle Tacoma Intl. Airport

    4:27 PM

    SEA

    2h 50m

    8:17 PM

    DEN

    S M T W T F S
    Search

  2. AS682

    Seattle Tacoma Intl. Airport

    7:21 AM

    SEA

    2h 57m

    11:18 AM

    DEN

    S M T W T F S
    Search

  3. DL2851

    Seattle Tacoma Intl. Airport

    7:40 PM

    SEA

    2h 48m

    11:28 PM

    DEN

    S M T W T F S
    Search

  4. DL953

    Seattle Tacoma Intl. Airport

    11:53 PM

    SEA

    3h 22m

    Nonstop

    5:15 AM

    MSP

    S M T W T F S
    Search

  5. DL2849

    Minneapolis-Saint Paul International Airport

    8:59 AM

    MSP

    2h 6m

    Nonstop

    10:05 AM

    DEN

    S M T W T F S

  6. F91178

    Seattle Tacoma Intl. Airport

    1:52 PM

    SEA

    2h 45m

    Nonstop

    4:37 PM

    LAX

    S M T W T F S
    Search

  7. F93156

    Los Angeles Intl. Airport

    6:15 AM

    LAX

    2h 30m

    Nonstop

    9:45 AM

    DEN

    S M T W T F S

  8. F91178

    Seattle Tacoma Intl. Airport

    1:52 PM

    SEA

    2h 45m

    Nonstop

    4:37 PM

    LAX

    S M T W T F S
    Search

  9. F92342

    Los Angeles Intl. Airport

    11:42 AM

    LAX

    2h 29m

    Nonstop

    3:11 PM

    DEN

    S - - W T F S

  10. F92276

    Seattle Tacoma Intl. Airport

    10:53 AM

    SEA

    2h 52m

    Nonstop

    1:45 PM

    ONT

    S - T W T - S
    Search

  11. F91500

    Ontario International Airport

    6:15 AM

    ONT

    2h 20m

    Nonstop

    9:35 AM

    DEN

    S M T W T F S
Find more flights and airlines

About Seattle Tacoma Intl. Airport and Denver International Airport

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

Flight distance 1,646.85 km
Cheapest one-way ticket price £18
Cheapest return ticket price £65

FAQs for Seattle Tacoma Intl. Airport to Denver International Airport Flights

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

    Seattle Tacoma Intl. Airport to Denver International Airport takes about 2 hours 17 minutes on average. Actual flight time may vary depending on route, weather and air traffic.
  • There are around 13 daily flights from Seattle Tacoma Intl. Airport (SEA) to Denver International Airport (DEN).
  • The earliest flight from Seattle Tacoma Intl. Airport to Denver International Airport departs at 05:00, and the last departs at 20:00, with about 35 flights per day. Flight times may change, so please check the latest departure and arrival times before you travel.
  • The route from Seattle Tacoma Intl. Airport (SEA) to Denver International Airport (DEN) is quite popular. Without considering departure times or holidays, tickets cost around £177 in October, the most expensive month to book this route.
  • The earliest flight departs from Seattle Tacoma Intl. Airport (SEA) at 05:02 and arrives in Denver International Airport (DEN) at 08:51.
  • The latest flight departs from Seattle Tacoma Intl. Airport (SEA) at 20:43 and arrives in Denver International Airport (DEN) at 00:35.
  • Frontier Airlines is a very popular airline operating an average of 4338 flights per month.
  • One-way flights from Seattle Tacoma Intl. Airport to Denver International Airport currently start from £18, and round-trip fares start from £65. The current lowest fare is a Frontier Airlines flight departing on Sun, Nov 8; prices may vary depending on availability.
  • Yes. United Airlines, Alaska Airlines, Delta Air Lines and Frontier Airlines operate direct flights from Seattle Tacoma Intl. Airport to Denver International Airport, with an average flight time of 2 hours 10 minutes, and around 127 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 Intl. Airport to Denver International Airport is £139. 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 Intl. Airport to Denver International Airport, with one-way fares starting from £18. Compare final prices carefully, as baggage, seat selection and payment fees may apply.
  • Seattle Tacoma Intl. Airport to Denver International Airport operates around 130 weekly flights, mainly by United Airlines and Alaska Airlines. Actual frequency may vary during holidays and seasonal schedule adjustments.
  • Enter Seattle Tacoma Intl. 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.

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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 in 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, WLAN, 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 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.