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.

$93 CHEAP FLIGHTS from Colorado to Seattle

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Cheap Flights from Colorado to Seattle

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from Colorado to Seattle

Wed, Jan 13 - Sat, Jan 30

7:08 pm - 5:18 pmDEN Denver Intl-SEA Seattle/Tacoma Intl

23h 10m1 stop Las Vegas Harry Reid Intl

4:29 pm - 8:19 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

2h 50mnonstop

$152Frontier

Wed, Jan 13 - Sat, Jan 30

10:50 pm - 5:18 pmDEN Denver Intl-SEA Seattle/Tacoma Intl

19h 28m1 stop Las Vegas Harry Reid Intl

4:29 pm - 8:19 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

2h 50mnonstop

$152Frontier

Wed, Feb 17 - Tue, Feb 23

1:03 pm - 3:14 pmDEN Denver Intl-SEA Seattle/Tacoma Intl

3h 11mnonstop

3:45 pm - 7:31 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

2h 46mnonstop

$198Multiple Airlines

Thu, Feb 11 - Sat, Feb 13

7:00 am - 9:05 amDEN Denver Intl-SEA Seattle/Tacoma Intl

3h 05mnonstop

4:29 pm - 8:19 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

2h 50mnonstop

$203Multiple Airlines

Wed, Oct 21 - Wed, Oct 21

7:53 am - 4:04 pmDEN Denver Intl-SEA Seattle/Tacoma Intl

9h 11m2 stops Portland San Francisco

6:54 pm - 10:37 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

2h 43mnonstop

$211Alaska Airlines

Sat, Oct 17 - Mon, Oct 19

7:14 pm - 9:15 pmDEN Denver Intl-SEA Seattle/Tacoma Intl

3h 01mnonstop

7:08 am - 11:02 amSEA Seattle/Tacoma Intl-DEN Denver Intl

2h 54mnonstop

$254Alaska Airlines

Tue, Oct 27 - Wed, Oct 28

7:25 pm - 10:00 amDEN Denver Intl-SEA Seattle/Tacoma Intl

15h 35m1 stop Los Angeles

1:55 pm - 5:47 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

2h 52mnonstop

$267Delta

Wed, Nov 4 - Sat, Nov 7

11:14 am - 5:57 pmCOS Colorado Springs-SEA Seattle/Tacoma Intl

7h 43m1 stop Denver Intl

12:45 pm - 8:49 pmSEA Seattle/Tacoma Intl-COS Colorado Springs

7h 04m1 stop Denver Intl

$297United Airlines

Sat, Nov 7 - Sat, Nov 7

5:30 am - 9:47 amCOS Colorado Springs-SEA Seattle/Tacoma Intl

5h 17m1 stop Denver Intl

3:49 pm - 9:22 pmSEA Seattle/Tacoma Intl-COS Colorado Springs

4h 33m1 stop Denver Intl

$297United Airlines

Tue, Nov 10 - Tue, Nov 10

1:14 pm - 3:25 pmDEN Denver Intl-SEA Seattle/Tacoma Intl

3h 11mnonstop

7:59 pm - 11:47 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

2h 48mnonstop

$307Delta

Recent last minute flight deals from Colorado to Seattle

Tue, Sep 29 - Thu, Oct 1

1:07 pm - 3:08 pmDEN Denver Intl-SEA Seattle/Tacoma Intl

3h 01mnonstop

4:27 pm - 8:21 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

2h 54mnonstop

$208Frontier

Tue, Sep 29 - Tue, Oct 6

1:07 pm - 3:08 pmDEN Denver Intl-SEA Seattle/Tacoma Intl

3h 01mnonstop

4:27 pm - 8:21 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

2h 54mnonstop

$261Frontier

Wed, Sep 30 - Tue, Oct 6

1:07 pm - 3:08 pmDEN Denver Intl-SEA Seattle/Tacoma Intl

3h 01mnonstop

7:08 am - 11:02 amSEA Seattle/Tacoma Intl-DEN Denver Intl

2h 54mnonstop

$349Multiple Airlines

Wed, Sep 30 - Tue, Oct 6

12:42 pm - 6:10 pmDEN Denver Intl-SEA Seattle/Tacoma Intl

6h 28m1 stop Los Angeles

6:54 pm - 10:37 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

2h 43mnonstop

$354Multiple Airlines

Sat, Sep 26 - Tue, Sep 29

7:08 pm - 9:08 pmDEN Denver Intl-SEA Seattle/Tacoma Intl

3h 00mnonstop

2:23 pm - 6:10 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

2h 47mnonstop

$356Alaska Airlines

Wed, Sep 30 - Sat, Oct 3

11:26 am - 5:37 pmDRO Durango La Plata County-SEA Seattle/Tacoma Intl

7h 11m1 stop Denver Intl

3:55 pm - 10:15 pmSEA Seattle/Tacoma Intl-DRO Durango La Plata County

5h 20m1 stop Denver Intl

$424United Airlines

Wed, Sep 30 - Sat, Oct 3

10:25 am - 5:37 pmDRO Durango La Plata County-SEA Seattle/Tacoma Intl

8h 12m1 stop Denver Intl

1:22 pm - 10:15 pmSEA Seattle/Tacoma Intl-DRO Durango La Plata County

7h 53m2 stops San Francisco Denver Intl

$430United Airlines

Wed, Sep 30 - Tue, Oct 6

12:50 pm - 8:20 pmDEN Denver Intl-SEA Seattle/Tacoma Intl

8h 30m2 stops Phoenix Sky Harbor Intl Oakland

11:30 am - 5:50 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

5h 20m1 stop Phoenix Sky Harbor Intl

$448Southwest

Mon, Sep 28 - Thu, Oct 8

10:15 am - 5:00 pmDEN Denver Intl-SEA Seattle/Tacoma Intl

7h 45m2 stops Tucson Phoenix Sky Harbor Intl

6:15 am - 2:45 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

7h 30m2 stops Las Vegas Harry Reid Intl Fresno Airterminal

$489Southwest

Tue, Sep 29 - Thu, Oct 1

12:17 pm - 2:15 pmDEN Denver Intl-SEA Seattle/Tacoma Intl

2h 58mnonstop

12:30 pm - 6:32 pmSEA Seattle/Tacoma Intl-DEN Denver Intl

5h 02m1 stop Portland

$519Alaska Airlines

Useful Info

Low season	January
High season	July
Cheapest flight	$93

Best time to beat the crowds with an average 25% drop in price.

Most popular time to fly with an average 24% increase in price.

Flight from Denver to Seattle

Verified travelerFlew with Delta-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-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.

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.

Lynnwood

Centralia

Fife

Lakewood

Westport

Lacey

Mukilteo

Woodinville

Poulsbo

Edmonds

Aberdeen

DuPont

Shoreline

Monroe

Castle Rock

Edgewood

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$93 Find Cheap Flights from Colorado to Seattle - Compare and Save

Cheap Flights from Colorado to Seattle

Recent round-trip flight deals from Colorado to Seattle

Recent one-way flight deals from Colorado to Seattle

Recent last minute flight deals from Colorado to Seattle

Recent direct flight deals from Colorado to Seattle

Good to know

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

FAQs for booking flights from Colorado to Seattle

Traveling to a place near Seattle?

More options for your flight to Seattle

Complete your trip to Seattle with a hotel stay or car rental

Information on the airport you'll fly into in Seattle

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Find direct flights for Seattle

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