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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 TWD 738 and round-trip from TWD 1,500. Based on Trip.com's latest 7-day flight data.

      • Cheapest nonstop
        SEA 16:27
        2h 50m
        Direct
        DEN 20:17
        Seattle - Denver | Mon, Nov 2 | Frontier Airlines
        DEN 13:04
        3h 8m
        Direct
        SEA 15:12
        Denver - Seattle | Mon, Nov 9 | Frontier Airlines
        TWD 1,500 TWD 3,213
        53% off
        53% off
        TWD 3,213 TWD 1,500
      • SEA 16:27
        2h 54m
        Direct
        DEN 20:21
        Seattle - Denver | Fri, Oct 2 | Frontier Airlines
        DEN 13:07
        3h 1m
        Direct
        SEA 15:08
        Denver - Seattle | Thu, Oct 8 | Frontier Airlines
        TWD 1,949 TWD 3,213
        39% off
        39% off
        TWD 3,213 TWD 1,949
      • SEA 16:27
        2h 54m
        Direct
        DEN 20:21
        Seattle - Denver | Fri, Oct 9 | Frontier Airlines
        DEN 13:07
        3h 1m
        Direct
        SEA 15:08
        Denver - Seattle | Fri, Oct 16 | Frontier Airlines
        TWD 1,949 TWD 3,213
        39% off
        39% off
        TWD 3,213 TWD 1,949
      • SEA 19:41
        2h 53m
        Direct
        DEN 23:34
        Seattle - Denver | Mon, Nov 9 | Frontier Airlines
        DEN 07:45
        3h 6m
        Direct
        SEA 09:51
        Denver - Seattle | Mon, Nov 16 | Frontier Airlines
        TWD 1,973
        39% off
        TWD 3,213 TWD 1,973
      • SEA 19:41
        2h 53m
        Direct
        DEN 23:34
        Seattle - Denver | Fri, Nov 6 | Frontier Airlines
        DEN 07:45
        3h 6m
        Direct
        SEA 09:51
        Denver - Seattle | Thu, Nov 12 | Frontier Airlines
        TWD 1,973
        39% off
        TWD 3,213 TWD 1,973
      • SEA 19:41
        2h 53m
        Direct
        DEN 23:34
        Seattle - Denver | Thu, Nov 12 | Frontier Airlines
        DEN 07:45
        3h 6m
        Direct
        SEA 09:51
        Denver - Seattle | Thu, Nov 19 | Frontier Airlines
        TWD 1,973
        39% off
        TWD 3,213 TWD 1,973
      • SEA 19:41
        2h 53m
        Direct
        DEN 23:34
        Seattle - Denver | Thu, Oct 29 | Frontier Airlines
        DEN 07:45
        3h 6m
        Direct
        SEA 09:51
        Denver - Seattle | Thu, Nov 5 | Frontier Airlines
        TWD 2,016
        37% off
        TWD 3,213 TWD 2,016
      • SEA 19:41
        2h 53m
        Direct
        DEN 23:34
        Seattle - Denver | Sat, Nov 7 | Frontier Airlines
        DEN 07:45
        3h 6m
        Direct
        SEA 09:51
        Denver - Seattle | Fri, Nov 13 | Frontier Airlines
        TWD 2,503
        22% off
        TWD 3,213 TWD 2,503
      • SEA 19:41
        2h 53m
        Direct
        DEN 23:34
        Seattle - Denver | Sat, Nov 14 | Frontier Airlines
        DEN 07:45
        3h 6m
        Direct
        SEA 09:51
        Denver - Seattle | Thu, Nov 19 | Frontier Airlines
        TWD 2,503
        22% off
        TWD 3,213 TWD 2,503
      • SEA 19:41
        2h 53m
        Direct
        DEN 23:34
        Seattle - Denver | Mon, Nov 16 | Frontier Airlines
        DEN 07:45
        3h 6m
        Direct
        SEA 09:51
        Denver - Seattle | Sat, Nov 21 | Frontier Airlines
        TWD 2,503
        22% off
        TWD 3,213 TWD 2,503
      • SEA 16:27
        2h 54m
        Direct
        DEN 20:21
        Seattle - Denver | Sat, Oct 10 | Frontier Airlines
        DEN 13:07
        3h 1m
        Direct
        SEA 15:08
        Denver - Seattle | Fri, Oct 16 | Frontier Airlines
        TWD 2,508
        22% off
        TWD 3,213 TWD 2,508
      • SEA 16:27
        2h 50m
        Direct
        DEN 20:17
        Seattle - Denver | Sat, Oct 17 | Frontier Airlines
        DEN 13:07
        3h 5m
        Direct
        SEA 15:12
        Denver - Seattle | Thu, Oct 22 | Frontier Airlines
        TWD 2,602
        19% off
        TWD 3,213 TWD 2,602
      • SEA 13:00
        17h 25m
        1 stop
        DEN 14:00
        Seattle - Denver | Fri, Sep 25 | Normal Airline
        DEN 15:00
        6h
        Direct
        SEA 16:00
        Denver - Seattle | Sun, Sep 27 | Normal Airline
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      • Cheapest nonstop
        SEA 16:27
        2h 48m
        Direct
        DEN 20:15
        Seattle - Denver | Sat, Nov 7 | Frontier Airlines
        TWD 738 TWD 3,038
        76% off
        76% off
        TWD 3,038 TWD 738
      • SEA 16:27
        2h 48m
        Direct
        DEN 20:15
        Seattle - Denver | Mon, Nov 2 | Frontier Airlines
        TWD 767 TWD 3,038
        75% off
        75% off
        TWD 3,038 TWD 767
      • SEA 16:27
        2h 50m
        Direct
        DEN 20:17
        Seattle - Denver | Mon, Oct 19 | Frontier Airlines
        TWD 790 TWD 3,038
        74% off
        74% off
        TWD 3,038 TWD 790
      • SEA 16:27
        2h 50m
        Direct
        DEN 20:17
        Seattle - Denver | Thu, Oct 22 | Frontier Airlines
        TWD 1,055
        65% off
        TWD 3,038 TWD 1,055
      • SEA 19:41
        2h 53m
        Direct
        DEN 23:34
        Seattle - Denver | Tue, Oct 13 | Frontier Airlines
        TWD 2,129
        30% off
        TWD 3,038 TWD 2,129
      • SEA 07:23
        2h 51m
        Direct
        DEN 11:14
        Seattle - Denver | Tue, Nov 3 | Alaska Airlines
        TWD 2,361
        22% off
        TWD 3,038 TWD 2,361
      • SEA 07:23
        2h 51m
        Direct
        DEN 11:14
        Seattle - Denver | Mon, Nov 2 | Alaska Airlines
        TWD 2,361
        22% off
        TWD 3,038 TWD 2,361
      • SEA 20:00
        2h 55m
        Direct
        DEN 23:55
        Seattle - Denver | Mon, Oct 19 | Delta Air Lines
        TWD 2,427
        20% off
        TWD 3,038 TWD 2,427
      • SEA 20:00
        2h 55m
        Direct
        DEN 23:55
        Seattle - Denver | Mon, Nov 2 | Delta Air Lines
        TWD 2,460
        19% off
        TWD 3,038 TWD 2,460
      • SEA 20:00
        2h 55m
        Direct
        DEN 23:55
        Seattle - Denver | Tue, Nov 3 | Delta Air Lines
        TWD 2,460
        19% off
        TWD 3,038 TWD 2,460
      • SEA 20:00
        2h 55m
        Direct
        DEN 23:55
        Seattle - Denver | Sat, Nov 7 | Delta Air Lines
        TWD 2,460
        19% off
        TWD 3,038 TWD 2,460
      • SEA 20:09
        12h 36m
        1 stop
        DEN 09:45
        Seattle - Denver | Tue, Nov 17 | Frontier Airlines
        TWD 2,243
        26% off
        TWD 3,038 TWD 2,243
      • SEA 13:00
        17h 25m
        1 stop
        DEN 14:00
        Seattle - Denver | Fri, Sep 25 | Normal Airline
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Displayed flight fares from Seattle-Tacoma International Airport to Denver International Airport are based on average prices across airlines for the next 3 months according to the latest Trip.com data.

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 TWD 3,585. It is best to avoid June, when the average price can reach TWD 6,615.

TWD 6,615
TWD 5,100
TWD 3,585
TWD 2,070
    Cheapest
  • TWD 3,922
    Sep
  • TWD 3,833
    Oct
  • TWD 4,905
    Nov
  • TWD 4,555
    Dec
  • TWD 3,585
    Jan
  • TWD 4,929
    Feb
  • TWD 4,622
    Mar
  • TWD 5,226
    Apr
  • TWD 4,490
    May
  • TWD 6,615
    Jun
  • TWD 6,410
    Jul
  • TWD 5,823
    Aug

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.

TWD 5,743
TWD 5,017
TWD 4,291
TWD 3,565
  • TWD 5,122
    Mon
  • TWD 4,291
    Tue
  • TWD 4,636
    Wed
  • TWD 5,282
    Thu
  • TWD 5,559
    Fri
  • TWD 5,129
    Sat
  • TWD 5,743
    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 TWD 738) among 7 carriers operating this route. Based on Trip.com's latest 7-day flight data.

Frontier Airlines
From TWD 738
Alaska Airlines
From TWD 2,347
Delta Air Lines
From TWD 2,427
American Airlines
From TWD 2,801
United Airlines
From TWD 3,813
Hahn Air
From TWD 4,773
Sun Country Airlines
From TWD 8,946

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. F93406

    Seattle-Tacoma International Airport

    16:27

    SEA

    2h 50m

    20:17

    DEN

    S M T W T F S
    Search

  2. AS682

    Seattle-Tacoma International Airport

    07:21

    SEA

    2h 57m

    11:18

    DEN

    S M T W T F S
    Search

  3. DL2851

    Seattle-Tacoma International Airport

    19:40

    SEA

    2h 48m

    23:28

    DEN

    S M T W T F S
    Search

  4. DL953

    Seattle-Tacoma International Airport

    23:53

    SEA

    3h 22m

    Direct

    05:15

    MSP

    S M T W T F S
    Search

  5. DL2849

    Minneapolis-Saint Paul International Airport

    08:59

    MSP

    2h 4m

    Direct

    10:03

    DEN

    S M T W T F S

  6. F91178

    Seattle-Tacoma International Airport

    20:00

    SEA

    2h 46m

    Direct

    22:46

    LAX

    S M T W T F S
    Search

  7. F93156

    Los Angeles International Airport

    06:05

    LAX

    2h 25m

    Direct

    09:30

    DEN

    S M T W T F S

  8. F91178

    Seattle-Tacoma International Airport

    20:00

    SEA

    2h 46m

    Direct

    22:46

    LAX

    S M T W T F S
    Search

  9. F92342

    Los Angeles International Airport

    14:28

    LAX

    2h 31m

    Direct

    17:59

    DEN

    S - - W T F S

  10. F92276

    Seattle-Tacoma International Airport

    10:53

    SEA

    2h 52m

    Direct

    13:45

    ONT

    S - T W T F S
    Search

  11. F91500

    Ontario International Airport

    06:15

    ONT

    2h 26m

    Direct

    09:41

    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 TWD 738
Cheapest return ticket price TWD 1,500

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 22 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 20:00, with about 28 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 TWD 10,067 in September, 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 TWD 738, and round-trip fares start from TWD 1,500. The current lowest fare is a Frontier Airlines flight departing on Sat, Nov 7; 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 13 minutes, and around 136 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 TWD 5,429. 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 TWD 738. Compare final prices carefully, as baggage, seat selection and payment fees may apply.
  • Seattle-Tacoma International Airport to Denver International Airport operates around 94 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.

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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.