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$59+ Cheap flights from Colorado to Seattle (SEA)

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 1/25. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SEA
Dec 27 — Jan 31
Fri 12/27
Fri 1/3
1 adult, Economy
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Cheap flight deals from Colorado to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Colorado (USCO) to Seattle (SEA). 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 December 22, 2024.

Round-trip from

$96
(Cheapflightsfares)

One-way from

$59
(Cheapflightsfares)
From Colorado to Seattle/Tacoma Intl
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One-way flight from Colorado to Seattle/Tacoma Intl
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Find flight deals from Colorado to Seattle

Cheapest flights from Colorado to Seattle
Explore the most affordable flight options available from Colorado to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 22, 2024.

This Kiwi.com deal was found by Cheapflights users on 12/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2311:00 amDEN - SEA
Nonstop3h 10mFrontier
Fri 1/39:36 pmSEA - DEN
Nonstop2h 45mFrontier
Deal found 12/21$180
This Orbitz deal was found by Cheapflights users on 12/21. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/316:00 amDEN - SEA
Nonstop3h 14mMultiple Airlines
Sat 1/49:36 pmSEA - DEN
Nonstop2h 45mMultiple Airlines
Deal found 12/21$273
This Delta deal was found by Cheapflights users on 12/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/285:30 amDEN - SEA
1 stop5h 19mDelta
Mon 1/68:15 amSEA - DEN
Nonstop2h 55mDelta
Deal found 12/21$317
This Alaska Airlines deal was found by Cheapflights users on 12/21. 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.
Sat 12/217:55 pmDEN - SEA
1 stop11h 09mAlaska Airlines
Sat 1/48:40 amSEA - DEN
1 stop9h 15mAlaska Airlines
Deal found 12/21$346
This United Airlines deal was found by Cheapflights users on 12/21. 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.
Mon 12/2311:55 amDEN - SEA
Nonstop3h 05mUnited Airlines
Tue 12/313:22 pmSEA - DEN
Nonstop2h 42mUnited Airlines
Deal found 12/21$377
This Southwest deal was found by Cheapflights users on 12/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/252:35 pmDEN - SEA
2 stops8h 40mSouthwest
Wed 1/112:55 pmSEA - DEN
1 stop7h 05mSouthwest
Deal found 12/21$381
This Gotogate deal was found by Cheapflights users on 12/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/246:10 pmDEN - SEA
1 stop17h 25mSun Country Air
Fri 12/276:40 pmSEA - DEN
1 stop11h 17mSun Country Air
Deal found 12/20$400
This Southwest deal was found by Cheapflights users on 12/20. 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.
Fri 12/274:30 pmHDN - SEA
1 stop9h 20mSouthwest
Fri 1/35:00 amSEA - HDN
1 stop6h 50mSouthwest
Deal found 12/20$462
This United deal was found by Cheapflights users on 12/21. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/239:05 amCOS - SEA
1 stop5h 55mUnited Airlines
Fri 12/275:00 amSEA - COS
1 stop4h 49mUnited Airlines
Deal found 12/21$476
This United Airlines deal was found by Cheapflights users on 12/21. 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.
Fri 12/271:25 pmHDN - SEA
1 stop5h 39mUnited Airlines
Fri 1/312:30 pmSEA - HDN
1 stop6h 57mUnited Airlines
Deal found 12/21$545
This United deal was found by Cheapflights users on 12/21. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/294:40 pmASE - SEA
1 stop6h 50mUnited Airlines
Fri 1/37:10 pmSEA - ASE
1 stop13h 36mUnited Airlines
Deal found 12/21$572
This American Airlines deal was found by Cheapflights users on 12/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/272:44 pmHDN - SEA
1 stop9h 22mAmerican Airlines
Thu 1/212:55 amSEA - HDN
1 stop10h 35mAmerican Airlines
Deal found 12/21$585

Find flights from Colorado to Seattle within your budget

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, Cheapflights users made 2,558,603 searches. Data last updated December 22, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Thu 2/6

8:54 am-2:18 pm

1 stop6h 24m

Seattle/Tacoma Intl

Wed 2/12

1:36 pm-5:25 pm

Nonstop2h 49m

$96

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Fri 1/24

12:20 pm-2:25 pm

Nonstop3h 05m

Seattle/Tacoma Intl

Tue 1/28

6:59 pm-10:36 pm

Nonstop2h 37m

$143

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Tue 2/18

6:25 am-8:39 am

Nonstop3h 14m

Seattle/Tacoma Intl

Sat 2/22

8:35 pm-12:17 am

Nonstop2h 42m

$157

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Tue 2/4

7:00 am-9:19 am

Nonstop3h 19m

Seattle/Tacoma Intl

Tue 2/11

6:59 pm-10:36 pm

Nonstop2h 37m

$172

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Sat 2/1

7:45 am-3:45 pm

1 stop9h 00m

Seattle/Tacoma Intl

Tue 2/4

12:50 pm-9:15 pm

1 stop7h 25m

$196

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Fri 1/24

11:24 am-5:02 pm

1 stop6h 38m

Seattle/Tacoma Intl

Tue 1/28

6:10 am-3:19 pm

1 stop8h 09m

$201

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Wed 2/19

4:50 pm-11:23 pm

1 stop7h 33m

Seattle/Tacoma Intl

Tue 2/25

12:43 am-9:55 am

1 stop8h 12m

$216

DenverSeattle

DEN - SEA

DENSEA

Denver Intl

Sun 2/2

8:30 am-3:10 pm

2 stops7h 40m

Seattle/Tacoma Intl

Sat 2/8

9:00 am-12:35 pm

Nonstop2h 35m

$232

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Wed 2/19

8:20 am-12:25 pm

1 stop5h 05m

Seattle/Tacoma Intl

Wed 2/26

1:30 pm-6:50 pm

1 stop4h 20m

$237

Colorado SpringsSeattle

COS - SEA

COSSEA

Colorado Springs

Wed 2/19

8:20 am-6:29 pm

2 stops11h 09m

Seattle/Tacoma Intl

Wed 2/26

5:02 am-10:55 am

1 stop4h 53m

$291

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/21

Showing 1-10 of 50 results
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Best time to book a flight from Colorado to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Colorado 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 Colorado to Seattle

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

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

Currently, January is the cheapest month in which you can book a flight from Colorado to Seattle (average of $238). Flying from Colorado to Seattle in July is currently the most expensive (average of $411). 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 CO to SEA?

Find hourly flight availability from Colorado to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 22, 2024.

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

Weekly flight availability from Colorado to Seattle

Explore weekly flight availability from Colorado to Seattle. 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 December 22, 2024.

The most flights from USCO to SEA are scheduled on a Saturday (31 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (11 on average).

Rainfall in Seattle by month

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

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

Temperature in Seattle by month

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

If weather is an important factor for your trip to Seattle, 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 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated December 22, 2024.
Peruse reviews from past customers who have flown with Alaska Airlines, American Airlines and Delta from Colorado to Seattle to help guide your decision. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,804 reviews

Crew

8.7

Food

7.2

Comfort

8.1

Overall

8.1

Entertainment

7.7

Boarding

8.2

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
4,804 reviews
Southwest
8.1
Very good
4,804 reviews

Crew

8.7

Food

7.2

Comfort

8.1

Overall

8.1

Entertainment

7.7

Boarding

8.2

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
9,537 reviews
Southwest
8.1
Very good
4,804 reviews

Crew

8.7

Food

7.2

Comfort

8.1

Overall

8.1

Entertainment

7.7

Boarding

8.2

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
8,594 reviews
Southwest
8.1
Very good
4,804 reviews

Crew

8.7

Food

7.2

Comfort

8.1

Overall

8.1

Entertainment

7.7

Boarding

8.2

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
9,028 reviews
Southwest
8.1
Very good
4,804 reviews

Crew

8.7

Food

7.2

Comfort

8.1

Overall

8.1

Entertainment

7.7

Boarding

8.2

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
4,804 reviews

Crew

8.7

Food

7.2

Comfort

8.1

Overall

8.1

Entertainment

7.7

Boarding

8.2

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 Colorado to Seattle. 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 into for flights to Seattle from Colorado?

    Seattle/Tacoma Intl (SEA) is the airport you will fly into if you book a flight from Colorado to Seattle. It is only a 11.4 mi journey from Seattle/Tacoma Intl (SEA) to Seattle’s city center.

  • How popular is this Colorado to Seattle flight route?

    This flight path from Colorado to Seattle/Tacoma Intl was viewed by 207 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 Colorado to Seattle one-way?

    To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $59. Southwest flights start at $79 while deals on Delta start at $89 one-way.

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

    Most travelers choose Denver Intl - Seattle/Tacoma Intl, Colorado Springs - Seattle/Tacoma Intl or Grand Junction Regnl - Seattle/Tacoma Intl when deciding on the best route from Colorado to Seattle.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Colorado to Seattle on time: Hawaiian Airlines (90%), Frontier (90%), Air France (90%).

  • What are the cheapest flights from Colorado to Seattle?

    While on average a flight from Colorado to Seattle is generally $1,126, our data shows the cheapest flight currently is $58. When looking at the most popular route, (Denver Intl - Seattle/Tacoma Intl), you can expect to pay $98 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Colorado to Seattle 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 Colorado to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Colorado to Seattle (average of $238). Flying from Colorado to Seattle in July is currently the most expensive (average of $411). 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 Colorado to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Colorado to Seattle

Discover the top 6 airlines that operate flights from Colorado to Seattle. 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 December 22, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$55Average$128FlexibilityNo cancel feeOn-time62%
DeltaCheapest$88Average$376FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$118Average$349FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$124Average$378FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$136Average$509FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$206Average$447FlexibilityNo cancel feeOn-time71%
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