SEA

$47 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 1/13. 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, 0 bags

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Everything you should know

Cheapest round-trip
$58
Overall average: $187
Frontier
Sun 3/1Mon 3/16
DEN - SEA • Non-stop
Cheapest one-way
$47
Typical prices: $96-$193
Southwest
Tue 1/13
DEN - SEA • Non-stop
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Flight Deals
Useful Info
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

Sun, Mar 1 - Mon, Mar 16
Frontier Logo
10:00 am - 12:14 pm
DEN
-
SEA
3h 14mnonstop
Frontier Logo
2:54 pm - 6:43 pm
SEA
-
DEN
2h 49mnonstop
$58Frontier
Mon, Jan 19 - Mon, Jan 26
Frontier Logo
9:00 am - 11:09 am
DEN
-
SEA
3h 09mnonstop
Frontier Logo
12:34 pm - 4:25 pm
SEA
-
DEN
2h 51mnonstop
$59Frontier
Mon, Mar 9 - Thu, Mar 26
Frontier Logo
10:16 am - 12:30 pm
DEN
-
SEA
3h 14mnonstop
Frontier Logo
2:54 pm - 6:43 pm
SEA
-
DEN
2h 49mnonstop
$66Frontier
Tue, Jan 20 - Sat, Feb 7
Delta Logo
12:00 pm - 4:55 pm
COS
-
SEA
5h 55m1 stop
Delta Logo
5:00 am - 11:18 am
SEA
-
COS
5h 18m1 stop
$137Delta
Tue, Jan 6 - Tue, Jan 13
Delta Logo
12:00 pm - 4:38 pm
COS
-
SEA
5h 38m1 stop
Delta Logo
5:25 am - 11:17 am
SEA
-
COS
4h 52m1 stop
$177Delta
Tue, Feb 10 - Tue, Feb 17
American Airlines Logo
7:06 am - 2:02 pm
GJT
-
SEA
7h 56m1 stop
American Airlines Logo
11:59 pm - 10:00 am
SEA
-
GJT
9h 01m1 stop
$211American Airlines
Sat, Feb 14 - Sat, Feb 28
United Airlines Logo
1:43 pm - 11:30 pm
GJT
-
SEA
10h 47m2 stops
United Airlines Logo
5:00 am - 10:51 am
SEA
-
GJT
4h 51m1 stop
$216United Airlines
Tue, Jan 6 - Tue, Jan 13
United Airlines Logo
3:30 pm - 9:15 pm
COS
-
SEA
6h 45m1 stop
United Airlines Logo
12:24 pm - 10:06 pm
SEA
-
COS
8h 42m2 stops
$222United Airlines
Fri, Jan 23 - Sun, Jan 25
American Airlines Logo
8:10 am - 5:45 pm
EGE
-
SEA
10h 35m1 stop
American Airlines Logo
6:00 am - 1:06 pm
SEA
-
EGE
6h 06m1 stop
$249American Airlines
Wed, Jan 21 - Sat, Jan 24
Alaska Airlines Logo
6:21 pm - 8:32 pm
EGE
-
SEA
3h 11mnonstop
Alaska Airlines Logo
2:05 pm - 5:41 pm
SEA
-
EGE
2h 36mnonstop
$357Alaska Airlines
Useful Info

Good to know

Low seasonJanuary
Cheapest flight$47
Best time to beat the crowds with an average 14% drop in price.
Most popular time to fly with an average 15% increase in price.
Flight from Denver to Seattle

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

Insights shared by verified travelers who flew the route from Colorado to Seattle 
Learn how KAYAK collects reviews and tips from users.
Verified travelerFlew with Delta
DEN
-
SEA
Jun 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 Airlines
DEN
-
SEA
Oct 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
Lakewood
Mukilteo
Lacey
Poulsbo
Edmonds
Aberdeen
Woodinville
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

Seattle (SEA)