HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Colorado

$83+ 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 5/26. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DEN
May 5 — May 121
Mon 5/5
Mon 5/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Colorado with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 April 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$132
(Cheapflightsfares)

One-way from

$83
(Trip.com)

Popular in

December

Cheapest in

September

Average price

$217

Good round-trip deal

$209 or less

Good one-way deal

$120 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Denver Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Denver Intl flights.
Search Deals
From Seattle/Tacoma Intl to Colorado
Search Deals
One-way flight from Seattle/Tacoma Intl to Colorado
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($8 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals
Price to beat on a round-trip flight from Seattle/Tacoma Intl to Colorado.
Search Deals
Price to beat on a one-way flight from Seattle/Tacoma Intl to Colorado.
Search Deals

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 April 30, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 4/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/136:00 amSEA - DEN
Nonstop2h 51mFrontier
Tue 5/139:43 pmDEN - SEA
Nonstop3h 06mFrontier
Deal found 4/29$132
This Expedia deal was found by Cheapflights users on 4/28. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/256:25 amSEA - DEN
Nonstop2h 49mMultiple Airlines
Tue 7/297:06 pmDEN - SEA
1 stop4h 53mMultiple Airlines
Deal found 4/28$182
This Delta deal was found by Cheapflights users on 4/29. 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.
Wed 5/217:10 amSEA - DEN
Nonstop2h 50mDelta
Tue 6/31:45 pmDEN - SEA
Nonstop2h 58mDelta
Deal found 4/29$197
This Alaska Airlines deal was found by Cheapflights users on 4/29. 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.
Wed 5/2110:15 amSEA - DEN
Nonstop2h 43mAlaska Airlines
Wed 5/2811:40 amDEN - SEA
1 stop4h 46mAlaska Airlines
Deal found 4/29$217
This Delta deal was found by Cheapflights users on 4/29. 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.
Wed 6/111:30 pmSEA - COS
1 stop7h 46mDelta
Wed 6/188:15 amCOS - SEA
1 stop7h 30mDelta
Deal found 4/29$217
This Southwest deal was found by Cheapflights users on 4/29. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/137:50 pmSEA - DEN
Nonstop2h 40mSouthwest
Mon 6/168:05 pmDEN - SEA
1 stop6h 20mSouthwest
Deal found 4/29$227
This United Airlines deal was found by Cheapflights users on 4/29. 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.
Tue 5/137:00 amSEA - DEN
1 stop6h 59mUnited Airlines
Tue 5/207:16 pmDEN - SEA
1 stop6h 43mUnited Airlines
Deal found 4/29$232
This American Airlines deal was found by Cheapflights users on 4/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1611:51 amSEA - DEN
1 stop8h 51mAmerican Airlines
Tue 9/238:39 amDEN - SEA
1 stop9h 11mAmerican Airlines
Deal found 4/29$237
This United Airlines deal was found by Cheapflights users on 4/29. 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.
Wed 5/148:50 amSEA - COS
1 stop4h 53mUnited Airlines
Wed 5/215:15 pmCOS - SEA
2 stops8h 44mUnited Airlines
Deal found 4/29$242
This Southwest deal was found by Cheapflights users on 4/29. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/15:20 amSEA - COS
1 stop10h 15mSouthwest
Sat 7/58:00 pmCOS - SEA
1 stop6h 05mSouthwest
Deal found 4/29$244
This Hawaiian Airlines deal was found by Cheapflights users on 4/29. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/166:00 pmSEA - DEN
Nonstop2h 47mHawaiian Airlines
Tue 9/2311:40 amDEN - SEA
1 stop7h 10mHawaiian Airlines
Deal found 4/29$257
This United Airlines deal was found by Cheapflights users on 4/29. 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.
Fri 5/302:30 pmSEA - DRO
1 stop5h 30mUnited Airlines
Tue 6/105:58 pmDRO - SEA
1 stop5h 32mUnited Airlines
Deal found 4/29$259

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 April 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

Tue 5/13

6:00 am-9:51 am

Nonstop2h 51m

Denver Intl

Tue 5/13

9:43 pm-11:49 pm

Nonstop3h 06m

$132

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Fri 7/25

6:25 am-10:14 am

Nonstop2h 49m

Denver Intl

Tue 7/29

7:06 pm-10:59 pm

1 stop4h 53m

$182

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 5/21

7:10 am-11:00 am

Nonstop2h 50m

Denver Intl

Tue 6/3

1:45 pm-3:43 pm

Nonstop2h 58m

$197

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Wed 5/21

10:15 am-1:58 pm

Nonstop2h 43m

Denver Intl

Wed 5/28

11:40 am-3:26 pm

1 stop4h 46m

$217

SeattleColorado Springs

SEA - COS

SEACOS

Seattle/Tacoma Intl

Wed 6/11

1:30 pm-10:16 pm

1 stop7h 46m

Colorado Springs

Wed 6/18

8:15 am-2:45 pm

1 stop7h 30m

$217

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Fri 6/13

7:50 pm-11:30 pm

Nonstop2h 40m

Denver Intl

Mon 6/16

8:05 pm-1:25 am

1 stop6h 20m

$227

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Tue 5/13

7:00 am-2:59 pm

1 stop6h 59m

Denver Intl

Tue 5/20

7:16 pm-12:59 am

1 stop6h 43m

$232

SeattleDenver

SEA - DEN

SEADEN

Seattle/Tacoma Intl

Tue 9/16

11:51 am-9:42 pm

1 stop8h 51m

Denver Intl

Wed 9/24

12:02 pm-7:47 pm

1 stop8h 45m

$237

SeattleColorado Springs

SEA - COS

SEACOS

Seattle/Tacoma Intl

Wed 5/14

8:50 am-2:43 pm

1 stop4h 53m

Colorado Springs

Wed 5/21

5:15 pm-12:59 am

2 stops8h 44m

$242

SeattleColorado Springs

SEA - COS

SEACOS

Seattle/Tacoma Intl

Tue 7/1

5:20 am-4:35 pm

1 stop10h 15m

Colorado Springs

Sat 7/5

8:00 pm-1:05 am

1 stop6h 05m

$244

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 55 results
1
2
3
...
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.

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 April 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 April 30, 2025.

The most flights from SEA to USCO are scheduled on a Tuesday (38 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (9 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 April 30, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Southwest 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.
Alaska Airlines
8.0
Very good
9,961 reviews

Boarding

8.2

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
Alaska Airlines
8.0
Very good
9,961 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Boarding

8.2

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
Southwest
8.0
Very good
4,295 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Boarding

8.2

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
Delta
8.0
Very good
7,929 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Boarding

8.2

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
Hawaiian Airlines
7.9
Good
2,405 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Boarding

8.2

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
United Airlines
7.4
Good
8,696 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Boarding

8.2

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

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 305 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?

    $83 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 $99 and $109, 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 Air France (94%), Aeromexico (92%) and KLM (92%).

  • What are the cheapest flights from Seattle to Colorado?

    On average you can expect to pay $630 for a flight from Seattle to Colorado. The cheapest flight overall is $88 while the most popular route, (Seattle/Tacoma Intl - Denver Intl) is currently priced at $154.

  • 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Seattle to Colorado

See prices for flight routes from nearby airports that may be better suited for you.
Seattle to Los Angeles flights
Seattle to Dallas/Fort Worth flights
Seattle to John F Kennedy Intl flights
Seattle to Las Vegas flights
Seattle to Newark flights
Seattle to Denver flights
Seattle to Honolulu flights
Seattle to Santa Ana flights
Seattle to Hobby flights
Seattle to San Diego flights
Seattle to Dulles Intl flights
Seattle to Sky Harbor Intl flights
Seattle to LaGuardia flights
Seattle to O'Hare Intl flights
Seattle to Reagan-National flights
Portland to Los Angeles flights
Seattle to George Bush Intcntl flights
Seattle to Ontario flights
Seattle to Atlanta flights
Seattle to Boston flights
Seattle to Orlando flights
Portland to John F Kennedy Intl flights
Seattle to Burbank flights
Portland to Newark flights
Seattle to San Francisco flights
Portland to Las Vegas flights
Seattle to Detroit flights
Seattle to San Jose flights
Seattle to Baltimore flights
Seattle to Salt Lake City flights
Seattle to Philadelphia flights
Portland to Dallas/Fort Worth flights
Portland to O'Hare Intl flights
Seattle to Kahului flights
Seattle to Austin flights
Seattle to Nashville flights
Seattle to New Orleans flights
Seattle to Miami flights
Everett to Las Vegas flights
Seattle to Minneapolis flights
Seattle to Kailua-Kona flights
Portland to Honolulu flights
Portland to Sky Harbor Intl flights
Seattle to Oakland flights
Portland to Orlando flights
Portland to Boston flights
Everett to Los Angeles flights
Seattle to Midway flights
Portland to LaGuardia flights
Seattle to Milwaukee flights

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 April 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$56Average$145FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$98Average$221FlexibilityNo cancel feeOn-time85%
DeltaCheapest$104Average$365FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$118Average$386FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$149Average$508FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$153Average$449FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$176Average$418FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.