SEA

$72 Find Cheap Flights from Colorado to Seattle

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Seattle departing on 10/24. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

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Everything you should know

Cheapest round-trip
$104
Overall average: $173
Frontier
Mon 10/27Thu 10/30
DEN - SEA • Non-stop
Cheapest one-way
$72
Typical prices: $89-174
Frontier
Fri 10/24
DEN - SEA • 1 stop
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Flight Deals
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Flight Deals

Cheap Flights from Colorado to Seattle

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Colorado to Seattle that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Colorado to Seattle

Mon, Oct 27 - Thu, Oct 30
Frontier Logo
9:58 am - 12:07 pmDEN-SEA
3h 09mnonstop
Frontier Logo
1:18 pm - 5:11 pmSEA-DEN
2h 53mnonstop
$104Frontier
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Fri, Dec 19 - Thu, Dec 25
Frontier Logo
9:30 am - 11:41 amDEN-SEA
3h 11mnonstop
Frontier Logo
12:36 pm - 4:27 pmSEA-DEN
2h 51mnonstop
$106Frontier
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Sat, Nov 15 - Sat, Nov 22
Multiple Airlines Logo
10:00 am - 12:13 pmDEN-SEA
3h 13mnonstop
Multiple Airlines Logo
8:17 pm - 11:59 pmSEA-DEN
2h 42mnonstop
$124Multiple Airlines
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Tue, Dec 9 - Sun, Dec 14
Multiple Airlines Logo
3:42 pm - 5:50 pmDEN-SEA
3h 08mnonstop
Multiple Airlines Logo
7:05 pm - 10:56 pmSEA-DEN
2h 51mnonstop
$128Multiple Airlines
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Fri, Nov 7 - Sun, Nov 9
Delta Logo
6:25 am - 8:31 amDEN-SEA
3h 06mnonstop
Delta Logo
7:40 pm - 11:27 pmSEA-DEN
2h 47mnonstop
$137Delta
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Fri, Dec 5 - Sat, Dec 13
Alaska Airlines Logo
11:41 am - 3:47 pmDEN-SEA
5h 06m1 stop
Alaska Airlines Logo
2:19 pm - 6:03 pmSEA-DEN
2h 44mnonstop
$147Alaska Airlines
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Fri, Nov 7 - Mon, Nov 10
Delta Logo
5:49 pm - 10:23 pmCOS-SEA
5h 34m1 stop
Delta Logo
11:15 am - 5:22 pmSEA-COS
5h 07m1 stop
$157Delta
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Fri, Nov 7 - Sat, Nov 8
American Airlines Logo
5:17 pm - 11:42 pmCOS-SEA
7h 25m1 stop
American Airlines Logo
12:59 am - 11:48 amSEA-COS
9h 49m1 stop
$159American Airlines
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Fri, Dec 12 - Tue, Dec 16
American Airlines Logo
4:40 pm - 11:38 pmGJT-SEA
7h 58m1 stop
American Airlines Logo
7:15 am - 4:02 pmSEA-GJT
7h 47m1 stop
$211American Airlines
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Thu, Feb 26 - Mon, Mar 2
Alaska Airlines Logo
11:43 am - 6:20 pmDRO-SEA
7h 37m1 stop
Alaska Airlines Logo
12:40 pm - 9:16 pmSEA-DRO
7h 36m1 stop
$338Alaska Airlines
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Useful Info

Flights from Colorado to Seattle: the best tips from KAYAK users

Insights shared by verified travelers who flew the route from Colorado to Seattle 
Verified travelerFlew with DeltaDEN-SEAJun 2025
If you are on the left side of the plane you should spot Mt. Rainer on your way into Seattle.
Verified travelerFlew with Alaska AirlinesDEN-SEAOct 2024
Go early, it’s a big airport. There are two TSA screening areas, one might be more crowded than the other. From checking it to the gate give yourself at least 20-30 minutes to get there.

FAQs for booking flights from Colorado to Seattle

  • How does KAYAK find such low prices on flights from Colorado to Seattle?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Colorado to Seattle.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Colorado to Seattle?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Colorado is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Colorado to Seattle?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Colorado with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Colorado to Seattle?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Colorado up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Lynnwood
Centralia
Fife
Westport
Mukilteo
Lakewood
Lacey
Aberdeen
Edmonds
Woodinville
Poulsbo
Shoreline
DuPont
Monroe
Castle Rock
Edgewood

Everything you need to know for your flight to Seattle

Information on the airport you'll fly into in Seattle

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