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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

$42 CHEAP FLIGHTS from Colorado to Seattle

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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.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from Colorado to Seattle

Tue, Oct 7 - Tue, Oct 14

9:58 am - 12:07 pmDEN-SEA

3h 09mnonstop

1:02 pm - 4:55 pmSEA-DEN

2h 53mnonstop

$74Frontier

Find Deal

Wed, Sep 3 - Mon, Sep 8

8:55 pm - 11:01 pmDEN-SEA

3h 06mnonstop

6:12 am - 10:08 amSEA-DEN

2h 56mnonstop

$75Frontier

Find Deal

Tue, Oct 28 - Tue, Nov 11

8:09 am - 2:45 pmCOS-SEA

7h 36m1 stop

11:25 am - 5:13 pmSEA-COS

4h 48m1 stop

$175Delta

Find Deal

Tue, Oct 28 - Tue, Nov 11

8:09 am - 4:54 pmCOS-SEA

9h 45m2 stops

11:25 am - 5:13 pmSEA-COS

4h 48m1 stop

$180Delta

Find Deal

Wed, Oct 22 - Mon, Oct 27

11:35 am - 3:05 pmCOS-SEA

4h 30m1 stop

5:15 am - 1:35 pmSEA-COS

7h 20m1 stop

$187Southwest

Find Deal

Wed, Oct 22 - Mon, Oct 27

11:35 am - 3:05 pmCOS-SEA

4h 30m1 stop

4:20 pm - 12:35 amSEA-COS

7h 15m2 stops

$192Southwest

Find Deal

Wed, Sep 10 - Sun, Sep 14

6:25 pm - 10:59 pmCOS-SEA

5h 34m1 stop

5:02 am - 1:14 pmSEA-COS

7h 12m1 stop

$227United Airlines

Find Deal

Fri, Nov 7 - Mon, Nov 10

6:05 pm - 11:10 pmDRO-SEA

6h 05m1 stop

5:05 am - 12:36 pmSEA-DRO

6h 31m1 stop

$238United Airlines

Find Deal

Thu, Oct 2 - Sun, Oct 5

4:34 pm - 10:59 pmASE-SEA

7h 25m1 stop

5:11 am - 4:04 pmSEA-ASE

9h 53m1 stop

$249American Airlines

Find Deal

Sat, Nov 8 - Sun, Nov 9

5:45 am - 1:10 pmCOS-SEA

8h 25m1 stop

12:59 am - 11:45 amSEA-COS

9h 46m1 stop

$268American Airlines

Find Deal

Useful Info

Low season	January
High season	July
Cheapest flight	$42

Best time to beat the crowds with an average 13% drop in price.

Most popular time to fly with an average 16% increase in price.

Flight from Denver 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.

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

Westport

Lacey

Lakewood

Mukilteo

Edmonds

Aberdeen

Woodinville

Poulsbo

Shoreline

DuPont

Monroe

Castle Rock

Edgewood

Everything you need to know for your flight to Seattle

Airports

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Information on the airport you'll fly into in Seattle

Seattle (SEA)

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.

SEA

$42 Find Cheap Flights from Colorado to Seattle

KAYAK searches hundreds of travel sites at once for deals on flights to Seattle

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

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

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?

Everything you need to know for your flight to Seattle

Information on the airport you'll fly into in Seattle

Cabin class types available on flights to Colorado

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

Find direct flights for Seattle

Flights to other popular destinations

Flights from domestic origins to Seattle

Choose which airport to fly into in Seattle

Find deals for your return flight