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$40+ 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 1/31. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DEN
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
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Cheap flight deals from Seattle to Colorado

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Colorado (USCO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 21, 2025.

Round-trip from

$98
(Frontier)

One-way from

$45
(Booking.com)
From Seattle/Tacoma Intl to Colorado
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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 January 21, 2025.

This Frontier deal was found by Cheapflights users on 1/19. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/23:18 pmSEA - DEN
Nonstop2h 47mFrontier
Mon 2/1012:20 pmDEN - SEA
Nonstop3h 05mFrontier
Deal found 1/19$98
This Delta deal was found by Cheapflights users on 1/20. 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.
Tue 2/117:55 pmSEA - DEN
Nonstop2h 47mDelta
Thu 2/136:25 amDEN - SEA
Nonstop3h 14mDelta
Deal found 1/20$117
This FlightHub deal was found by Cheapflights users on 1/20. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/261:36 pmSEA - EGE
1 stop23h 31mFrontier
Sun 3/23:07 pmEGE - SEA
1 stop22h 29mFrontier
Deal found 1/20$135
This Travelocity deal was found by Cheapflights users on 1/20. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/198:20 pmSEA - DEN
Nonstop2h 38mMultiple Airlines
Mon 3/2410:44 pmDEN - SEA
1 stop11h 46mMultiple Airlines
Deal found 1/20$154
This American Airlines deal was found by Cheapflights users on 1/20. 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.
Sun 2/2312:59 amSEA - COS
1 stop7h 56mAmerican Airlines
Thu 2/274:50 pmCOS - SEA
1 stop9h 06mAmerican Airlines
Deal found 1/20$159
This United Airlines deal was found by Cheapflights users on 1/21. 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.
Wed 2/193:04 pmSEA - DEN
1 stop6h 24mUnited Airlines
Wed 2/266:00 amDEN - SEA
1 stop6h 12mUnited Airlines
Deal found 1/21$188
This Southwest deal was found by Cheapflights users on 1/20. 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.
Wed 3/512:25 pmSEA - DEN
2 stops7h 20mSouthwest
Mon 3/1010:50 pmDEN - SEA
Nonstop3h 00mSouthwest
Deal found 1/20$198
This Southwest deal was found by Cheapflights users on 1/20. 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.
Wed 2/197:30 amSEA - COS
1 stop7h 20mSouthwest
Wed 2/264:35 pmCOS - SEA
1 stop7h 45mSouthwest
Deal found 1/20$218
This Alaska Airlines deal was found by Cheapflights users on 1/21. 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.
Wed 4/93:22 pmSEA - DEN
Nonstop2h 39mAlaska Airlines
Tue 4/152:53 pmDEN - SEA
1 stop6h 42mAlaska Airlines
Deal found 1/21$237
This Mytrip deal was found by Cheapflights users on 1/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/197:57 pmSEA - GJT
2 stops23h 17mMultiple Airlines
Sun 3/308:54 pmGJT - SEA
1 stop12h 49mMultiple Airlines
Deal found 1/20$238
This United Airlines deal was found by Cheapflights users on 1/20. 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.
Thu 3/273:01 pmSEA - COS
2 stops7h 58mUnited Airlines
Fri 3/286:35 pmCOS - SEA
1 stop5h 26mUnited Airlines
Deal found 1/20$259
This United Airlines deal was found by Cheapflights users on 1/20. 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.
Tue 3/257:00 amSEA - HDN
2 stops12h 43mUnited Airlines
Sat 3/292:46 pmHDN - SEA
1 stop7h 29mUnited Airlines
Deal found 1/20$264

Find flights from Seattle to Colorado within your budget

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 January 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Sun 2/2

3:18 pm-7:05 pm

Nonstop2h 47m

Denver Intl

Mon 2/10

12:20 pm-2:25 pm

Nonstop3h 05m

$98

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Tue 2/11

7:55 pm-11:42 pm

Nonstop2h 47m

Denver Intl

Mon 2/17

6:25 am-8:39 am

Nonstop3h 14m

$117

SeattleVail

SEA - EGE

SEAEGE

Seattle/Tacoma Intl

Wed 2/26

1:36 pm-2:07 pm

1 stop23h 31m

Vail Eagle County

Sun 3/2

3:07 pm-12:36 pm

1 stop22h 29m

$135

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 3/19

8:20 pm-11:58 pm

Nonstop2h 38m

Denver Intl

Mon 3/24

10:44 pm-9:30 am

1 stop11h 46m

$154

SeattleColorado Springs

SEA - COS

SEACOS

Seattle/Tacoma Intl

Sun 2/23

12:59 am-9:55 am

1 stop7h 56m

Colorado Springs

Thu 2/27

4:50 pm-12:56 am

1 stop9h 06m

$159

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 2/12

6:00 pm-9:44 pm

Nonstop2h 44m

Denver Intl

Wed 2/19

6:00 am-11:12 am

1 stop6h 12m

$183

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 3/5

12:25 pm-8:45 pm

2 stops7h 20m

Denver Intl

Mon 3/10

10:50 pm-12:50 am

Nonstop3h 00m

$198

SeattleColorado Springs

SEA - COS

SEACOS

Seattle/Tacoma Intl

Wed 2/19

7:30 am-3:50 pm

1 stop7h 20m

Colorado Springs

Wed 2/26

4:35 pm-11:20 pm

1 stop7h 45m

$218

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 4/9

3:22 pm-7:01 pm

Nonstop2h 39m

Denver Intl

Tue 4/15

2:53 pm-8:35 pm

1 stop6h 42m

$237

SeattleGrand Junction

SEA - GJT

SEAGJT

Seattle/Tacoma Intl

Wed 3/19

7:57 pm-8:14 pm

2 stops23h 17m

Grand Junction Regnl

Sun 3/30

8:54 pm-8:43 am

1 stop12h 49m

$238

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Showing 1-10 of 57 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.

Travel insights for flights from Seattle to Colorado

Get recent, data-driven insights about flights from Seattle to Colorado including ideal travel times, pricing trends, and more.

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 January 21, 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 January 21, 2025.

The most flights from SEA to USCO are scheduled on a Monday (34 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (17 on average).

Rainfall in Colorado by month

Plan your trip to Colorado by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Colorado ranges from 0.5 - 2.3 inches per month. May is typically the wettest month, when rainfall can reach 2.3 in. January is typically the driest time to visit Colorado when rainfall is around 0.5 in.

Temperature in Colorado by month

Plan your trip to Colorado by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Colorado, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

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 January 21, 2025.
Get a feel of what it's like to fly with Frontier, Delta and Southwest from Seattle to Colorado by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,662 reviews

Boarding

8.2

Overall

8.1

Crew

8.7

Entertainment

7.7

Comfort

8.1

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,662 reviews
Southwest
8.1
Very good
4,662 reviews

Boarding

8.2

Overall

8.1

Crew

8.7

Entertainment

7.7

Comfort

8.1

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Alaska Airlines
8.0
Very good
9,706 reviews
Southwest
8.1
Very good
4,662 reviews

Boarding

8.2

Overall

8.1

Crew

8.7

Entertainment

7.7

Comfort

8.1

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,521 reviews
Southwest
8.1
Very good
4,662 reviews

Boarding

8.2

Overall

8.1

Crew

8.7

Entertainment

7.7

Comfort

8.1

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
8,984 reviews
Southwest
8.1
Very good
4,662 reviews

Boarding

8.2

Overall

8.1

Crew

8.7

Entertainment

7.7

Comfort

8.1

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,662 reviews

Boarding

8.2

Overall

8.1

Crew

8.7

Entertainment

7.7

Comfort

8.1

Food

7.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

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 309 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?

    $45 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on American Airlines and Delta, with prices starting from $80 and $89, 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 - Aspen Pitkin County and Seattle/Tacoma Intl - Colorado Springs.

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

    The top 3 most reliable airlines when flying from Seattle to Colorado are United Airlines (94%), Japan Airlines (93%) and Copa Airlines (91%).

  • What are the cheapest flights from Seattle to Colorado?

    On average you can expect to pay $725 for a flight from Seattle to Colorado. The cheapest flight overall is $78 while the most popular route, (Seattle/Tacoma Intl - Denver Intl) is currently priced at $75.

  • 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.

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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 6 airlines flying from Seattle to Colorado

Discover the top 6 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 January 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$54Average$132FlexibilityNo cancel feeOn-time62%
DeltaCheapest$88Average$373FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$118Average$353FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$127Average$429FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$131Average$522FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$188Average$415FlexibilityNo cancel feeOn-time71%
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