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Cheap flights from Colorado to Seattle from $59

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Colorado to Seattle departing on 1/17. 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

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Multiple Airlines Logo
7:50 pm - 9:50 pmDEN-SEA
3h 00mnonstop
Multiple Airlines Logo
1:09 pm - 5:02 pmSEA-DEN
2h 53mnonstop
$87Multiple Airlines
Find Deal
Tue, Feb 24 - Fri, Feb 27
Frontier Logo
10:16 am - 12:30 pmDEN-SEA
3h 14mnonstop
Frontier Logo
2:54 pm - 6:43 pmSEA-DEN
2h 49mnonstop
$88Frontier
Find Deal
Thu, Dec 25 - Tue, Dec 30
Multiple Airlines Logo
10:00 am - 12:13 pmDEN-SEA
3h 13mnonstop
Multiple Airlines Logo
8:13 pm - 11:57 pmSEA-DEN
2h 44mnonstop
$89Multiple Airlines
Find Deal
Fri, Nov 14 - Sat, Nov 15
Alaska Airlines Logo
6:45 am - 8:58 amDEN-SEA
3h 13mnonstop
Alaska Airlines Logo
2:08 pm - 11:59 pmSEA-DEN
8h 51m1 stop
$90Alaska Airlines
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Wed, Dec 3 - Tue, Dec 16
Alaska Airlines Logo
7:50 pm - 9:50 pmDEN-SEA
3h 00mnonstop
Alaska Airlines Logo
9:55 am - 6:33 pmSEA-DEN
7h 38m1 stop
$104Alaska Airlines
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Sat, Feb 28 - Tue, Mar 3
Hawaiian Airlines Logo
8:02 pm - 10:13 pmDEN-SEA
3h 11mnonstop
Hawaiian Airlines Logo
8:15 pm - 11:59 pmSEA-DEN
2h 44mnonstop
$108Hawaiian Airlines
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Fri, Nov 14 - Mon, Nov 17
Delta Logo
7:51 pm - 10:00 pmDEN-SEA
3h 09mnonstop
Delta Logo
7:40 pm - 11:27 pmSEA-DEN
2h 47mnonstop
$109Delta
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Fri, Nov 14 - Mon, Nov 17
Delta Logo
6:15 am - 8:24 amDEN-SEA
3h 09mnonstop
Delta Logo
7:40 pm - 11:22 pmSEA-DEN
2h 42mnonstop
$117Delta
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Sat, Feb 28 - Tue, Mar 3
Southwest Logo
7:55 pm - 12:30 amCOS-SEA
5h 35m1 stop
Southwest Logo
5:15 am - 2:30 pmSEA-COS
8h 15m1 stop
$120Southwest
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Mon, Jan 5 - Wed, Jan 14
Southwest Logo
4:05 pm - 9:15 pmCOS-SEA
6h 10m1 stop
Southwest Logo
5:15 am - 1:50 pmSEA-COS
7h 35m1 stop
$121Southwest
Find Deal
Sat, Dec 6 - Mon, Dec 8

Southwest flights from Colorado to Seattle

Our best Southwest deals on Colorado to Seattle flight tickets
Southwest
Jan 5
COS7:55 pmColorado Springs
5h 35m
1 stop
SEA12:30 amSeattle/Tacoma Intl
Jan 14
SEA5:15 amSeattle/Tacoma Intl
8h 15m
1 stop
COS2:30 pmColorado Springs
$120
Find similar
Southwest
Dec 6
COS4:05 pmColorado Springs
6h 10m
1 stop
SEA9:15 pmSeattle/Tacoma Intl
Dec 8
SEA5:15 amSeattle/Tacoma Intl
7h 35m
1 stop
COS1:50 pmColorado Springs
$121
Find similar
Southwest
Dec 5
COS6:05 pmColorado Springs
5h 50m
1 stop
SEA10:55 pmSeattle/Tacoma Intl
Dec 8
SEA5:15 amSeattle/Tacoma Intl
7h 35m
1 stop
COS1:50 pmColorado Springs
$137
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Frontier flights from Colorado to Seattle

Our best Frontier deals on Colorado to Seattle flight tickets
Frontier
Dec 25
DEN10:16 amDenver Intl
3h 14m
SEA12:30 pmSeattle/Tacoma Intl
Dec 30
SEA2:54 pmSeattle/Tacoma Intl
2h 49m
DEN6:43 pmDenver Intl
$88
Find similar
Frontier
Dec 30
DEN10:16 amDenver Intl
3h 14m
SEA12:30 pmSeattle/Tacoma Intl
Jan 5
SEA2:54 pmSeattle/Tacoma Intl
2h 49m
DEN6:43 pmDenver Intl
$91
Find similar
Frontier
Jan 1
DEN10:16 amDenver Intl
3h 14m
SEA12:30 pmSeattle/Tacoma Intl
Jan 4
SEA2:54 pmSeattle/Tacoma Intl
2h 49m
DEN6:43 pmDenver Intl
$92
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momondo Fare Finder

 
Customize your flight search to find flights from Colorado to Seattle 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 October 23, 2025.
Use the filters below to find and compare flights from Colorado to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Tue 2/24

7:50 pm-9:50 pm

Nonstop3h 00m

Seattle/Tacoma Intl

Fri 2/27

1:09 pm-5:02 pm

Nonstop2h 53m

$87

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Thu 12/25

10:16 am-12:30 pm

Nonstop3h 14m

Seattle/Tacoma Intl

Tue 12/30

2:54 pm-6:43 pm

Nonstop2h 49m

$88

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Fri 11/14

10:00 am-12:13 pm

Nonstop3h 13m

Seattle/Tacoma Intl

Sat 11/15

8:13 pm-11:57 pm

Nonstop2h 44m

$89

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Wed 12/3

6:45 am-8:58 am

Nonstop3h 13m

Seattle/Tacoma Intl

Tue 12/16

2:08 pm-11:59 pm

1 stop8h 51m

$90

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Sat 2/28

7:50 pm-9:50 pm

Nonstop3h 00m

Seattle/Tacoma Intl

Tue 3/3

9:55 am-6:33 pm

1 stop7h 38m

$104

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Fri 11/14

8:02 pm-10:13 pm

Nonstop3h 11m

Seattle/Tacoma Intl

Mon 11/17

8:15 pm-11:59 pm

Nonstop2h 44m

$108

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Fri 11/14

7:51 pm-10:00 pm

Nonstop3h 09m

Seattle/Tacoma Intl

Mon 11/17

7:40 pm-11:27 pm

Nonstop2h 47m

$109

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Sat 2/28

6:15 am-8:24 am

Nonstop3h 09m

Seattle/Tacoma Intl

Tue 3/3

7:40 pm-11:22 pm

Nonstop2h 42m

$117

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Mon 1/5

7:55 pm-12:30 am

1 stop5h 35m

Seattle/Tacoma Intl

Wed 1/14

5:15 am-2:30 pm

1 stop8h 15m

$120

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Sat 12/6

4:05 pm-9:15 pm

1 stop6h 10m

Seattle/Tacoma Intl

Mon 12/8

5:15 am-1:50 pm

1 stop7h 35m

$121

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 Seattle from

How to get the cheapest flight ticket from Colorado to Seattle

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 Seattle?

In general, January is the cheapest month to fly from Colorado to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $183. If you don’t want to visit Seattle in January, then you should wait until February to fly from Colorado, when ticket prices are also cheap, with an average price of $187.

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

On average, the least expensive day to fly to Seattle from Colorado is on a Friday. momondo users have found tickets for Friday departures for as low as $292. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from Colorado because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $453.

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

Flying to Seattle from Colorado in the evening is the least expensive time of day to depart. momondo users have found prices as low as $278 when looking at flights departing in the evening. Flights to Seattle are more costly in the morning, with an average ticket price of $399. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

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

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

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

You are more likely to see cheaper flights to Seattle from Colorado when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $214 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Colorado for as low as $180 on momondo.

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

There are 4 cabin classes available to choose from on Colorado to Seattle/Tacoma Intl 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 Colorado to Seattle flights?

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

Cheap Colorado to Seattle flight deals and tips

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

Best Price Found

$120

Fastest flight time

2h 55m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from Colorado in the past 72 hours is $120. The best round-trip flight deal from Colorado to Seattle found on momondo in the last 72 hours is $201.
The fastest flight from Colorado to Seattle takes 2h 55m
Direct flights go from Colorado to Seattle every day.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)
Search flight deals

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

    Prices for flights from Colorado to Seattle/Tacoma Intl Airport were last updated today.

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

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

    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 Colorado to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The travel and health documents required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Colorado to Seattle?

Best airlines flying from Colorado to Seattle

Compare and see reviews for airlines that fly from Colorado to Seattle with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $71Free CancellationRating
5.8
3,128 reviews
Search Frontier flights
DeltaPriceFrom $111Free CancellationRating
7.9
7,981 reviews
Search Delta flights
Hawaiian AirlinesPriceFrom $111Free CancellationRating
7.8
2,788 reviews
Search Hawaiian Airlines flights
SouthwestPriceFrom $136Free CancellationRating
8.0
4,237 reviews
Search Southwest flights
United AirlinesPriceFrom $150Free CancellationRating
7.4
8,991 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $159Free CancellationRating
8.0
11,155 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $186Free CancellationRating
7.2
11,028 reviews
Search American Airlines flights

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Leavenworth
SeaTac
Ocean Shores
Renton
Olympia
Lynnwood
Kent
Marysville
Puyallup
Tukwila
Lakewood
Federal Way
Kirkland
Fife
Redmond
Cle Elum
Centralia
Shoreline
Westport

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Colorado to Seattle for you.

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

Yes. momondo allows you to filter the results for Colorado to Seattle flights to just show those with flexible booking policies.

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

Once you have performed a search for Colorado to Seattle flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Yes momondo offers price alerts on flights to Seattle from Colorado. 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.

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