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$84+ Cheap flights from Seattle (SEA) to Colorado

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DEN
ago. 4 — ago. 111
lun. 8/4
lun. 8/11
1 adult, Economy
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Cheap flight deals from Seattle to Colorado

Keep the following information in mind while searching for Seattle to Colorado flight deals. Data was last updated julio 30, 2025.

Round-trip from

$124
(Kiwi.com)

One-way from

$84
(Cheapflightsfares)

Popular in

December

Cheapest in

October

Average price

$216

Good round-trip deal

$181 or less

Good one-way deal

$131 or less
From Seattle/Tacoma Intl to Colorado
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One-way flight from Seattle/Tacoma Intl to Colorado
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Highest demand for flights based on searches. 0% potential increase in price ($0 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from Seattle/Tacoma Intl to Colorado.
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Price to beat on a one-way flight from Seattle/Tacoma Intl to Colorado.
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Find flight deals from Seattle to Colorado

Cheapest flights from Seattle to Colorado
Explore the most affordable flight options available from Seattle to Colorado. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 30, 2025.

This Kiwi.com deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/116:00 amSEA - DEN
Nonstop2h 51mFrontier
jue. 10/2310:29 pmDEN - SEA
Nonstop3h 02mFrontier
Deal found 7/30$124
This Trip.com deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/256:00 amSEA - DEN
Nonstop2h 51mMultiple Airlines
lun. 10/276:46 pmDEN - SEA
1 stop5h 18mMultiple Airlines
Deal found 7/28$152
This KAYAK deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/255:59 pmSEA - DEN
Nonstop2h 47mHawaiian Airlines
lun. 10/276:46 pmDEN - SEA
1 stop5h 18mHawaiian Airlines
Deal found 7/30$161
This Alaska Airlines deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/165:20 amSEA - DEN
1 stop4h 24mAlaska Airlines
mié. 9/179:23 pmDEN - SEA
Nonstop3h 05mAlaska Airlines
Deal found 7/29$167
This Delta deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 8/2611:55 pmSEA - COS
1 stop9h 21mDelta
mar. 9/25:55 pmCOS - SEA
1 stop5h 19mDelta
Deal found 7/29$197
This United Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/35:02 amSEA - COS
1 stop4h 52mUnited Airlines
sáb. 9/610:30 amCOS - SEA
1 stop6h 23mUnited Airlines
Deal found 7/30$217
This American Airlines deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/231:35 pmSEA - COS
1 stop9h 09mAmerican Airlines
mar. 10/2810:37 amCOS - SEA
1 stop7h 17mAmerican Airlines
Deal found 7/28$227
This United Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 8/225:02 amSEA - GJT
1 stop6h 34mUnited Airlines
lun. 8/256:05 pmGJT - SEA
1 stop5h 54mUnited Airlines
Deal found 7/30$229
This United Airlines deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/105:05 amSEA - DRO
1 stop6h 32mUnited Airlines
lun. 12/155:15 amDRO - SEA
1 stop5h 54mUnited Airlines
Deal found 7/29$238
This Southwest deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/36:45 amSEA - COS
2 stops9h 15mSouthwest
sáb. 9/65:00 pmCOS - SEA
1 stop6h 30mSouthwest
Deal found 7/30$243
This Delta deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/3010:15 amSEA - ASE
1 stop6h 36mDelta
vie. 9/512:05 pmASE - SEA
1 stop5h 46mDelta
Deal found 7/30$249
This American Airlines deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/710:32 amSEA - DRO
1 stop9h 22mAmerican Airlines
mar. 10/143:00 pmDRO - SEA
1 stop7h 00mAmerican Airlines
Deal found 7/28$279

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated julio 30, 2025.
Use the filters below to find and compare flights from Seattle to Colorado that are best for you.

Fly from

Seattle

Fly to

Colorado

Route

Depart

Return

Price

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

sáb. 10/11

6:00 am-9:51 am

Nonstop2h 51m

Denver Intl

jue. 10/23

10:29 pm-12:31 am

Nonstop3h 02m

$124

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

sáb. 10/25

6:00 am-9:51 am

Nonstop2h 51m

Denver Intl

lun. 10/27

6:46 pm-11:04 pm

1 stop5h 18m

$152

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

sáb. 10/25

5:59 pm-9:46 pm

Nonstop2h 47m

Denver Intl

lun. 10/27

6:46 pm-11:04 pm

1 stop5h 18m

$161

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

mar. 9/16

5:20 am-10:44 am

1 stop4h 24m

Denver Intl

mié. 9/17

9:23 pm-11:28 pm

Nonstop3h 05m

$167

SeattleColorado Springs

SEA - COS

SEACOS

Seattle/Tacoma Intl

mar. 8/26

11:55 pm-10:16 am

1 stop9h 21m

Colorado Springs

mar. 9/2

5:55 pm-10:14 pm

1 stop5h 19m

$197

SeattleHayden

SEA - HDN

SEAHDN

Seattle/Tacoma Intl

sáb. 1/10

7:05 am-2:08 pm

1 stop6h 03m

Hayden Yampa Valley

mié. 1/14

1:29 pm-6:09 pm

1 stop5h 40m

$211

SeattleColorado Springs

SEA - COS

SEACOS

Seattle/Tacoma Intl

mié. 9/3

5:02 am-10:54 am

1 stop4h 52m

Colorado Springs

sáb. 9/6

10:30 am-3:53 pm

1 stop6h 23m

$217

SeattleColorado Springs

SEA - COS

SEACOS

Seattle/Tacoma Intl

jue. 10/23

1:35 pm-11:44 pm

1 stop9h 09m

Colorado Springs

mar. 10/28

10:37 am-4:54 pm

1 stop7h 17m

$227

SeattleGrand Junction

SEA - GJT

SEAGJT

Seattle/Tacoma Intl

vie. 8/22

5:02 am-12:36 pm

1 stop6h 34m

Grand Junction Regnl

lun. 8/25

6:05 pm-10:59 pm

1 stop5h 54m

$229

SeattleDurango

SEA - DRO

SEADRO

Seattle/Tacoma Intl

mié. 12/10

5:05 am-12:37 pm

1 stop6h 32m

Durango La Plata County

lun. 12/15

5:15 am-10:09 am

1 stop5h 54m

$238

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 58 results
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Best time to book a flight from Seattle to Colorado

Have a flexible travel schedule? Discover the best time to fly to Colorado from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Colorado

What is the cheapest month to book a flight from Seattle to Colorado?

Currently, October is the cheapest month in which you can book a flight from Seattle to Colorado (average of $197). Flying from Seattle to Colorado in March is currently the most expensive (average of $278). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SEA to CO?

Find hourly flight availability from Seattle to Colorado. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated julio 30, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to Colorado as you normally would.

Weekly flight availability from Seattle to Colorado

Explore weekly flight availability from Seattle to Colorado. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated julio 30, 2025.

The most flights from SEA to USCO are scheduled on a Wednesday (55 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (30 on average).

Reviews of airlines servicing Colorado

Get insights into the airlines that provide service to Colorado. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Colorado. Reviews last updated julio 30, 2025.
See what other customers who have flown with Alaska Airlines, Southwest, and Delta from Seattle to Colorado have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Southwest
8.0
Very good
4,241 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,980 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Hawaiian Airlines
7.8
Good
2,611 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,896 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Colorado. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Seattle to Colorado?

    For a flight from Seattle to Colorado, you will be flying from Seattle/Tacoma Intl. Seattle/Tacoma Intl (SEA) is just 11.4 mi from the center of the city.

  • How popular is this Seattle to Colorado flight route?

    The Seattle/Tacoma Intl to Colorado flight path was viewed by 298 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • What are the cheapest airlines to fly from Seattle to Colorado one-way?

    $84 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Delta and Alaska Airlines, with prices starting from $87 and $88, respectively.

  • What are the most popular routes from Seattle to Colorado?

    The most popular flight routes from Seattle to Colorado are Seattle/Tacoma Intl - Denver Intl, Seattle/Tacoma Intl - Colorado Springs and Seattle/Tacoma Intl - Durango La Plata County.

  • What are the most reliable airlines from Seattle to Colorado?

    The top 3 most reliable airlines when flying from Seattle to Colorado are ANA (77%), United Airlines (73%) and Scandinavian Airlines (73%).

  • What are the cheapest flights from Seattle to Colorado?

    On average you can expect to pay $578 for a flight from Seattle to Colorado. The cheapest flight overall is $79 while the most popular route, (Seattle/Tacoma Intl - Denver Intl) is currently priced at $88.

  • Can I find deals for flights from Seattle to Colorado that include hotel bookings?

    Yes. In addition to deals on Seattle to Colorado flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Colorado?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Colorado.

  • Can I find deals for business class flights from Seattle to Colorado?

    Yes. Cheapflights offers flight deals from Seattle to Colorado by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Colorado?

    Currently, October is the cheapest month in which you can book a flight from Seattle to Colorado (average of $197). Flying from Seattle to Colorado in March is currently the most expensive (average of $278). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Seattle to Colorado

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from Seattle to Colorado

Discover the top 7 airlines that operate flights from Seattle to Colorado. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated julio 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$61Average$157FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$98Average$237FlexibilityNo cancel feeOn-time85%
DeltaCheapest$108Average$320FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$126Average$382FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$148Average$494FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$166Average$396FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$169Average$415FlexibilityNo cancel feeOn-time71%

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