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Cheap flights from Seattle to Colorado from $43

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 4/27. 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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0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
12:24 pm - 4:15 pm
SEA
-
DEN
2h 51mnonstop
Multiple Airlines Logo
7:00 am - 9:10 am
DEN
-
SEA
3h 10mnonstop
$77Multiple Airlines
Thu, Mar 19 - Tue, Mar 24
Frontier Logo
12:42 pm - 4:37 pm
SEA
-
DEN
2h 55mnonstop
Frontier Logo
7:15 am - 9:27 am
DEN
-
SEA
3h 12mnonstop
$79Frontier
Sun, Apr 5 - Sat, Apr 18
Multiple Airlines Logo
7:12 pm - 10:59 pm
SEA
-
DEN
2h 47mnonstop
Multiple Airlines Logo
7:00 am - 9:10 am
DEN
-
SEA
3h 10mnonstop
$82Multiple Airlines
Tue, Apr 14 - Wed, Apr 15
Delta Logo
5:30 am - 11:24 am
SEA
-
COS
4h 54m
1 stop
Delta Logo
8:15 am - 2:54 pm
COS
-
SEA
7h 39m
1 stop
$137Delta
Wed, Apr 1 - Sun, Apr 5
Southwest Logo
9:20 am - 3:30 pm
SEA
-
COS
5h 10m
1 stop
Southwest Logo
7:20 pm - 12:55 am
COS
-
SEA
6h 35m
1 stop
$205Southwest
Wed, Apr 15 - Fri, Apr 17
Southwest Logo
6:50 am - 3:30 pm
SEA
-
COS
7h 40m
2 stops
Southwest Logo
7:20 pm - 12:55 am
COS
-
SEA
6h 35m
1 stop
$210Southwest
Wed, Apr 15 - Fri, Apr 17
United Airlines Logo
6:32 am - 1:29 pm
SEA
-
MTJ
5h 57m
1 stop
United Airlines Logo
3:39 pm - 9:14 pm
MTJ
-
SEA
6h 35m
1 stop
$211United Airlines
Thu, Mar 19 - Thu, Mar 26
United Airlines Logo
5:00 am - 2:07 pm
SEA
-
HDN
8h 07m
1 stop
United Airlines Logo
4:43 pm - 11:16 pm
HDN
-
SEA
7h 33m
1 stop
$211United Airlines
Wed, Mar 18 - Mon, Mar 23
Delta Logo
4:55 pm - 9:53 pm
SEA
-
GJT
3h 58m
1 stop
Delta Logo
7:45 am - 12:27 pm
GJT
-
SEA
5h 42m
1 stop
$211Delta
Tue, Mar 10 - Tue, Mar 17
Alaska Airlines Logo
1:22 pm - 4:49 pm
SEA
-
HDN
2h 27mnonstop
Alaska Airlines Logo
5:29 pm - 7:21 pm
HDN
-
SEA
2h 52mnonstop
$237Alaska Airlines
Sat, Mar 21 - Sat, Mar 28

Frontier flights from Seattle to Colorado

Our best Frontier deals on Seattle to Colorado flight tickets
Frontier
Apr 5
SEA12:42 pmSeattle/Tacoma Intl
2h 55m
DEN4:37 pmDenver Intl
Apr 18
DEN7:15 amDenver Intl
3h 12m
SEA9:27 amSeattle/Tacoma Intl
$79
Frontier
Apr 15
SEA10:42 amSeattle/Tacoma Intl
8h 07m
1 stop
DEN7:49 pmDenver Intl
Apr 22
DEN7:15 amDenver Intl
3h 12m
SEA9:27 amSeattle/Tacoma Intl
$86
Frontier
Apr 16
SEA4:20 pmSeattle/Tacoma Intl
2h 51m
DEN8:11 pmDenver Intl
Apr 17
DEN12:51 pmDenver Intl
3h 14m
SEA3:05 pmSeattle/Tacoma Intl
$91

Delta flights from Seattle to Colorado

Our best Delta deals on Seattle to Colorado flight tickets
Delta
Apr 16
SEA8:00 pmSeattle/Tacoma Intl
2h 50m
DEN11:50 pmDenver Intl
Apr 20
DEN6:27 pmDenver Intl
6h 32m
1 stop
SEA11:59 pmSeattle/Tacoma Intl
$107
Delta
Apr 4
SEA7:46 pmSeattle/Tacoma Intl
2h 46m
DEN11:32 pmDenver Intl
Apr 7
DEN6:30 amDenver Intl
3h 08m
SEA8:38 amSeattle/Tacoma Intl
$117
Delta
Apr 25
SEA5:35 amSeattle/Tacoma Intl
4h 57m
1 stop
DEN11:32 amDenver Intl
Apr 29
DEN6:55 amDenver Intl
3h 06m
SEA9:01 amSeattle/Tacoma Intl
$127

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Colorado that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated February 24, 2026.
Use the filters below to find and compare flights from Seattle to Colorado that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Thu 3/19

12:24 pm-4:15 pm

Nonstop2h 51m

Denver Intl

Tue 3/24

7:00 am-9:10 am

Nonstop3h 10m

$77

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Sun 4/5

12:42 pm-4:37 pm

Nonstop2h 55m

Denver Intl

Sat 4/18

7:15 am-9:27 am

Nonstop3h 12m

$79

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Tue 4/14

7:12 pm-10:59 pm

Nonstop2h 47m

Denver Intl

Wed 4/15

7:00 am-9:10 am

Nonstop3h 10m

$82

SeattleColorado Springs

SEA - COS

SEACOS

Seattle/Tacoma Intl

Wed 4/1

5:30 am-11:24 am

1 stop4h 54m

Colorado Springs

Sun 4/5

8:15 am-2:54 pm

1 stop7h 39m

$137

SeattleColorado Springs

SEA - COS

SEACOS

Seattle/Tacoma Intl

Wed 4/15

9:20 am-3:30 pm

1 stop5h 10m

Colorado Springs

Fri 4/17

7:20 pm-12:55 am

1 stop6h 35m

$205

SeattleColorado Springs

SEA - COS

SEACOS

Seattle/Tacoma Intl

Wed 4/15

6:50 am-3:30 pm

2 stops7h 40m

Colorado Springs

Fri 4/17

7:20 pm-12:55 am

1 stop6h 35m

$210

SeattleMontrose

SEA - MTJ

SEAMTJ

Seattle/Tacoma Intl

Thu 3/19

6:32 am-1:29 pm

1 stop5h 57m

Montrose County

Thu 3/26

3:39 pm-9:14 pm

1 stop6h 35m

$211

SeattleHayden

SEA - HDN

SEAHDN

Seattle/Tacoma Intl

Wed 3/18

5:00 am-2:07 pm

1 stop8h 07m

Hayden Yampa Valley

Mon 3/23

4:43 pm-11:16 pm

1 stop7h 33m

$211

SeattleGrand Junction

SEA - GJT

SEAGJT

Seattle/Tacoma Intl

Tue 3/10

4:55 pm-9:53 pm

1 stop3h 58m

Grand Junction Regnl

Tue 3/17

7:45 am-12:27 pm

1 stop5h 42m

$211

SeattleHayden

SEA - HDN

SEAHDN

Seattle/Tacoma Intl

Sat 3/21

1:22 pm-4:49 pm

Nonstop2h 27m

Hayden Yampa Valley

Sat 3/28

5:29 pm-7:21 pm

Nonstop2h 52m

$237

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Colorado from

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

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 $197.

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 $270. 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 $332.

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 $246. In the morning is when there is more demand to fly to Colorado, so prices are often more expensive at around $316 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 $212 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 $180 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

$143

Fastest flight time

2h 33m

Direct flights

Every day

Airports in Colorado

87 airports
The best one-way flight to Colorado from Seattle in the past 72 hours is $143. The best round-trip flight deal from Seattle to Colorado found on momondo in the last 72 hours is $216.
The fastest flight from Seattle to Colorado takes 2h 33m
Direct flights go from Seattle to Colorado every day.
There are 87 airports in Colorado. From Seattle there are direct flights to Vail Eagle County (EGE), Hayden Yampa Valley (HDN), Denver Intl (DEN).
Search flight deals

  • 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?

  • 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?

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
FrontierPriceFrom $57Free CancellationRating
5.7
3,043 reviews
Search Frontier flights
Hawaiian AirlinesPriceFrom $78Free CancellationRating
7.8
2,836 reviews
Search Hawaiian Airlines flights
DeltaPriceFrom $98Free CancellationRating
7.9
8,238 reviews
Search Delta flights
Alaska AirlinesPriceFrom $117Free CancellationRating
8.0
11,948 reviews
Search Alaska Airlines flights
SouthwestPriceFrom $126Free CancellationRating
8.0
4,300 reviews
Search Southwest flights
United AirlinesPriceFrom $131Free CancellationRating
7.4
9,344 reviews
Search United Airlines flights
American AirlinesPriceFrom $216Free CancellationRating
7.2
11,344 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

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.
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