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$45+ 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 3/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DEN
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$96
(Cheapflightsfares)

One-way from

$45
(Booking.com)

Popular in

December

Cheapest in

March

Average price

$207

Good round-trip deal

$194 or less

Good one-way deal

$132 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Denver Intl flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Denver Intl flights.
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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. 11% potential increase in price ($23 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in February 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 February 20, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 2/19. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/266:00 amSEA - DEN
Nonstop2h 46mFrontier
Mon 4/289:25 amDEN - SEA
Nonstop3h 10mFrontier
Deal found 2/19$96
This Expedia deal was found by Cheapflights users on 2/19. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/185:42 pmSEA - DEN
Nonstop2h 38mMultiple Airlines
Fri 3/289:56 amDEN - SEA
Nonstop3h 06mMultiple Airlines
Deal found 2/19$133
This Delta deal was found by Cheapflights users on 2/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/253:20 pmSEA - DEN
Nonstop2h 50mDelta
Mon 3/317:50 pmDEN - SEA
Nonstop3h 13mDelta
Deal found 2/19$137
This Trip.com deal was found by Cheapflights users on 2/19. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/62:02 pmSEA - EGE
2 stops20h 07mFrontier
Mon 3/1011:59 amEGE - SEA
2 stops22h 31mFrontier
Deal found 2/19$184
This Hawaiian Airlines deal was found by Cheapflights users on 2/19. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/235:30 amSEA - DEN
1 stop4h 51mHawaiian Airlines
Sat 4/268:20 amDEN - SEA
1 stop5h 09mHawaiian Airlines
Deal found 2/19$216
This Alaska Airlines deal was found by Cheapflights users on 2/19. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/178:05 amSEA - DEN
1 stop4h 49mAlaska Airlines
Wed 3/197:00 amDEN - SEA
Nonstop3h 07mAlaska Airlines
Deal found 2/19$217
This United Airlines deal was found by Cheapflights users on 2/18. 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 3/198:50 amSEA - COS
1 stop4h 46mUnited Airlines
Wed 3/261:45 pmCOS - SEA
1 stop5h 20mUnited Airlines
Deal found 2/18$217
This United Airlines deal was found by Cheapflights users on 2/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/37:17 pmSEA - DEN
Nonstop2h 43mUnited Airlines
Fri 4/45:50 pmDEN - SEA
1 stop8h 18mUnited Airlines
Deal found 2/19$224
This American Airlines deal was found by Cheapflights users on 2/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/1712:59 amSEA - COS
1 stop7h 53mAmerican Airlines
Tue 3/254:40 pmCOS - SEA
1 stop7h 29mAmerican Airlines
Deal found 2/19$237
This Southwest deal was found by Cheapflights users on 2/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/36:15 amSEA - COS
1 stop8h 05mSouthwest
Sun 5/45:55 pmCOS - SEA
1 stop7h 30mSouthwest
Deal found 2/19$247
This Delta deal was found by Cheapflights users on 2/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/111:30 pmSEA - COS
1 stop4h 35mDelta
Fri 4/188:05 amCOS - SEA
1 stop5h 25mDelta
Deal found 2/19$257
This Delta deal was found by Cheapflights users on 2/20. 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.
Thu 3/135:30 amSEA - GJT
1 stop6h 05mDelta
Mon 3/171:15 pmGJT - SEA
1 stop4h 42mDelta
Deal found 2/20$289

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 February 20, 2025.

Fly from

Seattle

Fly to

Colorado

Route

Depart

Return

Price

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Sat 4/26

6:00 am-9:46 am

Nonstop2h 46m

Denver Intl

Mon 4/28

9:25 am-11:35 am

Nonstop3h 10m

$96

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Tue 3/18

5:42 pm-9:20 pm

Nonstop2h 38m

Denver Intl

Fri 3/28

9:56 am-12:02 pm

Nonstop3h 06m

$133

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Tue 3/25

3:20 pm-7:10 pm

Nonstop2h 50m

Denver Intl

Mon 3/31

7:50 pm-10:03 pm

Nonstop3h 13m

$137

SeattleVail

SEA - EGE

SEAEGE

Seattle/Tacoma Intl

Thu 3/6

2:02 pm-11:09 am

2 stops20h 07m

Vail Eagle County

Mon 3/10

11:59 am-9:30 am

2 stops22h 31m

$184

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 4/23

5:30 am-11:21 am

1 stop4h 51m

Denver Intl

Sat 4/26

8:20 am-12:29 pm

1 stop5h 09m

$216

SeattleColorado Springs

SEA - COS

SEACOS

Seattle/Tacoma Intl

Wed 3/19

8:50 am-2:36 pm

1 stop4h 46m

Colorado Springs

Wed 3/26

1:45 pm-6:05 pm

1 stop5h 20m

$217

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Thu 4/3

7:17 pm-11:00 pm

Nonstop2h 43m

Denver Intl

Sat 4/19

5:50 pm-12:58 am

1 stop8h 08m

$223

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Fri 5/2

3:51 pm-9:15 pm

1 stop4h 24m

Denver Intl

Sat 5/3

6:37 pm-10:28 pm

1 stop4h 51m

$226

SeattleColorado Springs

SEA - COS

SEACOS

Seattle/Tacoma Intl

Mon 3/17

12:59 am-9:52 am

1 stop7h 53m

Colorado Springs

Tue 3/25

4:40 pm-11:09 pm

1 stop7h 29m

$237

SeattleColorado Springs

SEA - COS

SEACOS

Seattle/Tacoma Intl

Sat 5/3

6:15 am-3:20 pm

1 stop8h 05m

Colorado Springs

Sun 5/4

5:55 pm-12:25 am

1 stop7h 30m

$247

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

Showing 1-10 of 58 results
1
2
3
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6

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 February 20, 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 February 20, 2025.

The most flights from SEA to USCO are scheduled on a Thursday (41 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (7 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 February 20, 2025.
Get a feel of what it's like to fly with Southwest, Alaska Airlines and Delta 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
4,411 reviews

Entertainment

7.6

Boarding

8.2

Crew

8.7

Food

7.1

Comfort

8.1

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Southwest
8.1
Very good
4,411 reviews
Southwest
8.1
Very good
4,411 reviews

Entertainment

7.6

Boarding

8.2

Crew

8.7

Food

7.1

Comfort

8.1

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Alaska Airlines
8.0
Very good
9,692 reviews
Southwest
8.1
Very good
4,411 reviews

Entertainment

7.6

Boarding

8.2

Crew

8.7

Food

7.1

Comfort

8.1

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Delta
8.0
Very good
8,220 reviews
Southwest
8.1
Very good
4,411 reviews

Entertainment

7.6

Boarding

8.2

Crew

8.7

Food

7.1

Comfort

8.1

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Hawaiian Airlines
7.9
Good
2,317 reviews
Southwest
8.1
Very good
4,411 reviews

Entertainment

7.6

Boarding

8.2

Crew

8.7

Food

7.1

Comfort

8.1

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

United Airlines
7.4
Good
8,766 reviews
Southwest
8.1
Very good
4,411 reviews

Entertainment

7.6

Boarding

8.2

Crew

8.7

Food

7.1

Comfort

8.1

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

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 306 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 Alaska Airlines and Southwest, with prices starting from $69 and $84, 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 - Grand Junction Regnl.

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

    The top 3 most reliable airlines when flying from Seattle to Colorado are Copa Airlines (93%), ANA (93%) and Condor (92%).

  • What are the cheapest flights from Seattle to Colorado?

    On average you can expect to pay $660 for a flight from Seattle to Colorado. The cheapest flight overall is $70 while the most popular route, (Seattle/Tacoma Intl - Denver Intl) is currently priced at $128.

  • 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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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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$55Average$136FlexibilityNo cancel feeOn-time62%
DeltaCheapest$90Average$370FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$118Average$367FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$133Average$440FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$142Average$519FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$176Average$415FlexibilityNo cancel feeOn-time71%
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