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Find cheap one-way flights from Denver to Seattle starting at US$18.

Discover our range of affordable one-way and round-trip flights from Denver to Seattle and kick-start your next adventure today!

  • One way
  • Round-trip
      • DEN06:00
        3h 1m
        Direct
        SEA08:01
        Sat, Sep 21|Denver - Seattle|Frontier Airlines
        US$18US$41
        55% OFF
        55% OFF
        US$41US$18
      • DEN06:35
        3h 2m
        Direct
        SEA08:37
        Tue, Aug 27|Denver - Seattle|Frontier Airlines
        US$24US$41
        42% OFF
        42% OFF
        US$41US$24
      • DEN19:08
        3h 3m
        Direct
        SEA21:11
        Sat, Sep 7|Denver - Seattle|Frontier Airlines
        US$24US$41
        41% OFF
        41% OFF
        US$41US$24
      • DEN19:08
        3h 3m
        Direct
        SEA21:11
        Sat, Sep 14|Denver - Seattle|Frontier Airlines
        US$25
        US$25
      • DEN06:35
        3h 2m
        Direct
        SEA08:37
        Sat, Aug 31|Denver - Seattle|Frontier Airlines
        US$25
        US$25
      • DEN06:35
        3h 2m
        Direct
        SEA08:37
        Tue, Sep 10|Denver - Seattle|Frontier Airlines
        US$26
        US$26
      • DEN06:35
        3h 2m
        Direct
        SEA08:37
        Wed, Aug 28|Denver - Seattle|Frontier Airlines
        US$26
        US$26
      • DEN05:01
        2h 59m
        Direct
        SEA07:00
        Wed, Aug 7|Denver - Seattle|Frontier Airlines
        US$27
        US$27
      • DEN06:35
        3h 2m
        Direct
        SEA08:37
        Sat, Aug 24|Denver - Seattle|Frontier Airlines
        US$29
        US$29
      • DEN19:08
        3h 3m
        Direct
        SEA21:11
        Wed, Oct 23|Denver - Seattle|Frontier Airlines
        US$30
        US$30
      • DEN13:00
        3h 5m
        Direct
        SEA14:00
        Sat, Aug 3|Denver - Seattle|Frontier Airlines
        Find More Flights
        Find More Flights

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

When is the cheapest time to book flights from Denver to Seattle?

Price trend charts are a great way of tracking how much your flights cost in the lead up to departure and can help you choose when to book your tickets. See how prices to Seattle from Denver have changed and are set to move below.

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.
Cheapest airlines flights from Denver to Seattle

We have a range of prices from different airlines providing flights from Denver to Seattle. Check below for the journey which best suits your travel needs.

Frontier Airlines
From US$18
Alaska Airlines
From US$51
Delta Air Lines
From US$75
United Airlines
From US$79
American Airlines
From US$88
Southwest Airlines
From US$133
Sun Country Airlines
From US$256
ANA airlines

Find more flights and airlines

Find cheap flights from Denver to Seattle by different airports

Searching for potential routes that might be cheaper and faster? There are a few alternative ways to get to Seattle from Denver which could help you save money and time.

  • Cheapest
    Frontier Airlines
    DEN
    06:00
    3h 1m
    Direct
    SEA
    08:01
    Denver International Airport - Seattle-Tacoma International Airport
    Sat, Sep 21Frontier Airlines
    US$18
  • Frontier Airlines
    DEN
    06:00
    3h 1m
    Direct
    SEA
    08:01
    Denver International Airport - Seattle-Tacoma International Airport
    Sat, Sep 21Frontier Airlines
    US$18
    Find More Flights

Frequently Asked Questions

  • When are flight tickets from Denver (DEN) to Seattle (SEA) the cheapest?

    Airlines adjust prices for flights from Denver to Seattle based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much do flights from Denver (DEN) to Seattle (SEA) cost?

    According to Trip.com's data, the lowest price is around $235.

  • How long does it take to fly from Denver (DEN) to Seattle (SEA) and what is the distance?

    It takes around 3 hours 12 minutes to fly from Denver (DEN) to Seattle (SEA).

  • What is the transportation method from the main airport to downtown in Seattle?

    • The distance from Seattle-Tacoma International Airport to downtown is about 17km. It takes about 30 minutes by taxi.

  • What are the most popular airlines that fly from Denver (DEN) to Seattle (SEA)?

    Airlines with flights from Denver (DEN) to Seattle (SEA): All Nippon Airways, Air Tahiti Nui, Southwest Airlines, United Airlines, Volaris, Alaska Airlines and KLM.

How to find a cheap flight from Denver to Seattle

Understanding the common pitfalls when booking your flight tickets can help you save massively when it comes time to fly. We’ve listed our six essential steps to keep in mind when you’re booking flight tickets to help you find the best price.
1
Book Early
Once prices are gone, they're gone. Lock in deals while you can!
2
Compare Flight Prices
Compare prices on travel agency and airline websites.
3
Look Out for Deals
Check airline and travel agency websites for latest flight deals
4
Check One-way Fares
Buying two cheap one-way flights can sometimes be a better deal than a round-trip.
5
Try Different Dates
Flying during the week, early in the morning, or late at night can help save money.
6
Use the Trip.com App
Save up to £10 per person when booking your flights on Trip.com

Denver to Seattle Flight Information

Cheapest nonstop flight price

$18

Cheapest round-trip ticket price

$52

Off-season for travel

April

Peak season for travel

January

Flight distance

1,644.78km

Average flight time

3 hours 12 minutes

Popular airline

American Airlines

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