How many flights depart from Seattle to Colorado on average per week?

The number of flights available between Seattle and Colorado is 182 per week as of April 2026. The most frequent departure day is Mon, with 18% of weekly flights leaving on this day.

What is the cheapest airline that flies from Seattle/Tacoma Intl to Colorado?

Delta, United Airlines, and Southwest are the most popular carriers operating from Seattle/Tacoma Intl to Colorado

How many flights depart from Seattle to Colorado on average per day?

26 flights are operational daily from Seattle to Colorado as of April 2026. The most popular departure time for this route is 7:00PM, with 37% of flights per day taking off in the afternoon.

What airlines fly to Colorado?

Frontier, United Airlines and Alaska Airlines are the top three most popular airlines that fly to Colorado from Seattle according to our data. Frontier is the first choice among our users, with 41% of people opting to fly with this airline when traveling to Colorado. Keep in mind that there are 7 different airlines that fly to Colorado on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Colorado?

Prices for flights from Seattle/Tacoma Intl Airport to Colorado refresh daily.

How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Colorado?

There are 7 operators available for flights from Seattle/Tacoma Intl Airport to Colorado as of April 2026.

How old do you have to be to fly from Seattle/Tacoma Intl Airport to Colorado?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Colorado.

What documentation or ID do you need to fly to Colorado?

The necessary travel and health documents for your Colorado trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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Find the cheapest flights from Seattle to Colorado

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:50 pm - 11:54 pm

SEA

DEN

3h 04mnonstop

7:50 am - 9:49 am

DEN

SEA

2h 59mnonstop

$97Frontier

Wed, May 6 - Sun, May 10

7:12 pm - 10:59 pm

SEA

DEN

2h 47mnonstop

7:15 am - 9:27 am

DEN

SEA

3h 12mnonstop

$98Frontier

Wed, Apr 29 - Thu, Apr 30

8:51 am - 2:24 pm

SEA

COS

4h 33m

1 stop

6:57 pm - 10:59 pm

COS

SEA

5h 02m

1 stop

$217United Airlines

Wed, May 6 - Wed, May 13

11:35 am - 9:20 pm

SEA

COS

8h 45m

2 stops

6:00 am - 10:55 am

COS

SEA

5h 55m

1 stop

$242Southwest

Wed, May 6 - Wed, May 13

5:00 am - 10:46 am

SEA

COS

4h 46m

1 stop

12:56 pm - 5:59 pm

COS

SEA

6h 03m

1 stop

$245United Airlines

Tue, May 26 - Tue, Jun 2

5:30 am - 4:10 pm

SEA

COS

9h 40m

2 stops

7:05 am - 4:55 pm

COS

SEA

10h 50m

1 stop

$248Southwest

Wed, May 6 - Wed, May 13

9:40 am - 4:40 pm

SEA

GJT

6h 00m

1 stop

5:15 pm - 10:05 pm

GJT

SEA

5h 50m

1 stop

$271Delta

Fri, Sep 25 - Sun, Sep 27

1:45 pm - 10:13 pm

SEA

COS

7h 28m

2 stops

8:15 am - 4:53 pm

COS

SEA

9h 38m

2 stops

$298Delta

Wed, May 6 - Wed, May 13

1:47 pm - 10:41 pm

SEA

GJT

7h 54m

1 stop

11:46 am - 7:13 pm

GJT

SEA

8h 27m

1 stop

$341Alaska Airlines

Sat, May 2 - Wed, May 6

9:18 pm - 5:21 pm

SEA

ASE

19h 03m

1 stop

5:51 pm - 11:59 pm

ASE

SEA

7h 08m

1 stop

$499Alaska Airlines

Thu, Jun 18 - Mon, Jun 22

Frontier flights from Seattle to Colorado

Our best Frontier deals on Seattle to Colorado flight tickets

Frontier

May 6

SEA7:50 pmSeattle/Tacoma Intl

3h 04m

DEN11:54 pmDenver Intl

May 10

DEN7:50 amDenver Intl

2h 59m

SEA9:49 amSeattle/Tacoma Intl

$97

Frontier

Apr 29

SEA7:12 pmSeattle/Tacoma Intl

2h 47m

DEN10:59 pmDenver Intl

Apr 30

DEN7:15 amDenver Intl

3h 12m

SEA9:27 amSeattle/Tacoma Intl

$98

Frontier

Jun 4

SEA3:19 pmSeattle/Tacoma Intl

2h 59m

DEN7:18 pmDenver Intl

Jun 7

DEN12:00 pmDenver Intl

3h 01m

SEA2:01 pmSeattle/Tacoma Intl

$102

United Airlines flights from Seattle to Colorado

Our best United Airlines deals on Seattle to Colorado flight tickets

United Airlines

May 6

SEA8:51 amSeattle/Tacoma Intl

6h 40m

1 stop

COS4:31 pmColorado Springs

May 13

COS6:57 pmColorado Springs

5h 02m

1 stop

SEA10:59 pmSeattle/Tacoma Intl

$217

United Airlines

May 26

SEA5:00 amSeattle/Tacoma Intl

4h 46m

1 stop

COS10:46 amColorado Springs

Jun 2

COS12:56 pmColorado Springs

6h 03m

1 stop

SEA5:59 pmSeattle/Tacoma Intl

$245

United Airlines

Aug 29

SEA2:26 pmSeattle/Tacoma Intl

4h 46m

1 stop

MTJ8:12 pmMontrose County

Sep 12

MTJ7:15 amMontrose County

10h 00m

2 stops

SEA4:15 pmSeattle/Tacoma Intl

$276

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 5/6

7:50 pm-11:54 pm

Nonstop3h 04m

Denver Intl

Sun 5/10

7:50 am-9:49 am

Nonstop2h 59m

$97

Quickest round-trip

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 4/29

7:12 pm-10:59 pm

Nonstop2h 47m

Denver Intl

Thu 4/30

7:15 am-9:27 am

Nonstop3h 12m

$98

SeattleColorado Springs

SEA - COS

SEACOS

Seattle/Tacoma Intl

Wed 5/6

8:51 am-2:24 pm

1 stop4h 33m

Colorado Springs

Wed 5/13

6:57 pm-10:59 pm

1 stop5h 02m

$217

SeattleColorado Springs

SEA - COS

SEACOS

Seattle/Tacoma Intl

Wed 5/6

11:35 am-9:20 pm

2 stops8h 45m

Colorado Springs

Wed 5/13

6:00 am-10:55 am

1 stop5h 55m

$242

SeattleColorado Springs

SEA - COS

SEACOS

Seattle/Tacoma Intl

Tue 5/26

5:00 am-10:46 am

1 stop4h 46m

Colorado Springs

Tue 6/2

12:56 pm-5:59 pm

1 stop6h 03m

$245

SeattleColorado Springs

SEA - COS

SEACOS

Seattle/Tacoma Intl

Wed 5/6

5:30 am-4:10 pm

2 stops9h 40m

Colorado Springs

Wed 5/13

7:05 am-4:55 pm

1 stop10h 50m

$248

SeattleGrand Junction

SEA - GJT

SEAGJT

Seattle/Tacoma Intl

Fri 9/25

9:40 am-4:40 pm

1 stop6h 00m

Grand Junction Regnl

Sun 9/27

5:15 pm-10:05 pm

1 stop5h 50m

$271

SeattleColorado Springs

SEA - COS

SEACOS

Seattle/Tacoma Intl

Wed 5/6

1:45 pm-10:13 pm

2 stops7h 28m

Colorado Springs

Wed 5/13

8:15 am-4:53 pm

2 stops9h 38m

$298

SeattleGrand Junction

SEA - GJT

SEAGJT

Seattle/Tacoma Intl

Sat 5/2

1:47 pm-10:41 pm

1 stop7h 54m

Grand Junction Regnl

Wed 5/6

11:46 am-7:13 pm

1 stop8h 27m

$341

SeattleAspen

SEA - ASE

SEAASE

Seattle/Tacoma Intl

Thu 6/18

9:18 pm-5:21 pm

1 stop19h 03m

Aspen Pitkin County

Mon 6/22

5:51 pm-11:59 pm

1 stop7h 08m

$499

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Seattle to Colorado

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Colorado?

The month of January is, on average, the cheapest month to fly to Colorado from Seattle, with most prices found around $159. The month of September is another great option to travel to Colorado, with average flight prices from Seattle averaging around $195.

What is the cheapest day to depart on your flight to Colorado?

The cheapest day to depart from Seattle to Colorado is on a Friday when prices can be found for as low as $274. On the other hand, Sunday is the most expensive day to depart from Seattle because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $338.

What is the cheapest time of day to depart on your flight to Colorado?

The cheapest time of day to fly to Colorado is in the evening when flights can be purchased for as low as $242. In the morning is when there is more demand to fly to Colorado, so prices are often more expensive at around $314 per ticket.

What is the cheapest Seattle/Tacoma Intl to Colorado flight route?

Fly from Seattle/Tacoma Intl to Denver Intl for the best Seattle/Tacoma Intl - Colorado flight prices

How far in advance should I book a flight to Colorado?

You are more likely to see cheaper flights to Colorado from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Colorado for around $216 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Colorado from Seattle for as low as $174 on momondo.

What cabin class options are available on Seattle/Tacoma Intl to Colorado flights?

There are 4 cabin classes available to choose from on Seattle/Tacoma Intl to Colorado flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Seattle to Colorado flights?

No. A direct flight is the cheapest option for a flight between Seattle to Colorado.

Cheap Seattle to Colorado flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Colorado

Best Price Found	$155
Fastest flight time	2h 45m
Direct flights	Every day
Airports in Colorado	87 airports

The best one-way flight to Colorado from Seattle in the past 72 hours is $155. The best round-trip flight deal from Seattle to Colorado found on momondo in the last 72 hours is $253.

The fastest flight from Seattle to Colorado takes 2h 45m

Direct flights go from Seattle to Colorado every day.

There are 87 airports in Colorado. From Seattle there are direct flights to Denver Intl (DEN).

Search flight deals

Frequently asked questions about flying from Seattle to Colorado

When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Colorado?
Prices for flights from Seattle/Tacoma Intl Airport to Colorado refresh daily.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Colorado?
There are 7 operators available for flights from Seattle/Tacoma Intl Airport to Colorado as of April 2026.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Colorado?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Colorado.
What documentation or ID do you need to fly to Colorado?
The necessary travel and health documents for your Colorado trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Seattle to Colorado?
Based on momondo bookings for flights between Seattle and Colorado, the leading plane model is Boeing 737 MAX 8, making up 20.25% of the total bookings. Other popular models include Boeing 737-800 with 12.67%, Airbus A321neo with 12.54%, and Boeing 737 MAX 9 with 12.10%.

Best airlines flying from Seattle to Colorado

Compare and see reviews for airlines that fly from Seattle to Colorado with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $56	Free Cancellation	Rating 5.7 2,993 reviews	Search Frontier flights
Hawaiian Airlines	PriceFrom $78	Free Cancellation	Rating 7.8 2,838 reviews	Search Hawaiian Airlines flights
Delta	PriceFrom $94	Free Cancellation	Rating 7.9 8,407 reviews	Search Delta flights
Alaska Airlines	PriceFrom $117	Free Cancellation	Rating 7.9 12,226 reviews	Search Alaska Airlines flights
Southwest	PriceFrom $118	Free Cancellation	Rating 8.0 4,331 reviews	Search Southwest flights
United Airlines	PriceFrom $130	Free Cancellation	Rating 7.4 9,579 reviews	Search United Airlines flights
American Airlines	PriceFrom $216	Free Cancellation	Rating 7.1 11,569 reviews	Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Colorado?

Finding the right flight to Colorado from Seattle is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Colorado quick and easy, saving you time and money.

Can I find flights from Seattle to Colorado with flexible booking policies on momondo?

Yes. All flights to Colorado from Seattle on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Seattle to Colorado?

Once all potential Seattle to Colorado flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Seattle to Colorado right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Colorado from Seattle. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Colorado trip

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Popular cities in Colorado

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Flights to Las Vegasfrom $48

Flights to Washington, D.C.from $56

Flights to Bostonfrom $66

Flights to Atlantafrom $51

Flights to Dallasfrom $59

Flights to Fort Lauderdalefrom $53

Cheap flights from Seattle to Colorado from $63

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Colorado departing on 5/22. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Frontier flights from Seattle to Colorado

Our best Frontier deals on Seattle to Colorado flight tickets

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See travel insights to Colorado from

How to get the cheapest flight ticket from Seattle to Colorado

What is the cheapest month to fly to Colorado?

What is the cheapest day to depart on your flight to Colorado?

What is the cheapest time of day to depart on your flight to Colorado?

What is the cheapest Seattle/Tacoma Intl to Colorado flight route?

How far in advance should I book a flight to Colorado?

What cabin class options are available on Seattle/Tacoma Intl to Colorado flights?

Can stopping save me money on Seattle to Colorado flights?

What is the cheapest airline that flies from Seattle/Tacoma Intl to Colorado?

What airlines fly to Colorado?

How many flights depart from Seattle to Colorado on average per day?

How many flights depart from Seattle to Colorado on average per week?

Cheap Seattle to Colorado flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Colorado

Best Price Found

Fastest flight time

Direct flights

Airports in Colorado

Frequently asked questions about flying from Seattle to Colorado

Best airlines flying from Seattle to Colorado

Compare and see reviews for airlines that fly from Seattle to Colorado with momondo

Why use momondo?

An easier way to manage your Colorado trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Colorado

Popular cities in Colorado

Popular flights according to clicks in the last 7 days on momondo

Seattle flight routes

According to popular flight searches on momondo this year

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