Cheap Flights From Seattle - Tacoma Intl. (SEA) To Denver Intl. (DEN)

Wander Wisely with exceptional service, 24/7 supportOpens in a new window

Feel at ease with free flight cancellations within 24 hours of booking

Change your flight without a fee on select flights

Find The Best Dates To Fly

Cheapest Flights from Seattle (SEA) to Denver (DEN)

The cheapest flights to Denver Intl. found within the past 7 days were CA $135 round trip and CA $67 one way. Prices and availability subject to change. Additional terms may apply.

Thu, Jan 22 - Thu, Jan 29
SEA
Seattle
DEN
Denver
CA $135 Roundtrip, found 1 day ago
CA $135
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Thu, Jan 22 from Seattle to Denver, returning Thu, Jan 29, priced at CA $135 found 1 day ago
Mon, Jan 12 - Thu, Jan 15
SEA
Seattle
DEN
Denver
CA $137 Roundtrip, found 23 hours ago
CA $137
Roundtrip
found 23 hours ago
Select Alaska Airlines flight, departing Mon, Jan 12 from Seattle to Denver, returning Thu, Jan 15, priced at CA $137 found 23 hours ago
Thu, Jan 22 - Thu, Jan 29
SEA
Seattle
DEN
Denver
CA $148 Roundtrip, found 1 day ago
CA $148
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Thu, Jan 22 from Seattle to Denver, returning Thu, Jan 29, priced at CA $148 found 1 day ago
Sat, Feb 21 - Sat, Feb 28
SEA
Seattle
DEN
Denver
CA $150 Roundtrip, just found
CA $150
Roundtrip
just found
Select Alaska Airlines flight, departing Sat, Feb 21 from Seattle to Denver, returning Sat, Feb 28, priced at CA $150 just found
Mon, Jan 12 - Thu, Jan 15
SEA
Seattle
DEN
Denver
CA $163 Roundtrip, found 23 hours ago
CA $163
Roundtrip
found 23 hours ago
Select Alaska Airlines flight, departing Mon, Jan 12 from Seattle to Denver, returning Thu, Jan 15, priced at CA $163 found 23 hours ago
Sat, Jan 24 - Tue, Jan 27
SEA
Seattle
DEN
Denver
CA $164 Roundtrip, found 4 days ago
CA $164
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Sat, Jan 24 from Seattle to Denver, returning Tue, Jan 27, priced at CA $164 found 4 days ago
Thu, Jan 22 - Wed, Jan 28
SEA
Seattle
DEN
Denver
CA $176 Roundtrip, found 2 days ago
CA $176
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Thu, Jan 22 from Seattle to Denver, returning Wed, Jan 28, priced at CA $176 found 2 days ago
Sat, Feb 21 - Sat, Feb 28
SEA
Seattle
DEN
Denver
CA $178 Roundtrip, just found
CA $178
Roundtrip
just found
Select American Airlines flight, departing Sat, Feb 21 from Seattle to Denver, returning Sat, Feb 28, priced at CA $178 just found
Sat, Feb 21 - Sat, Feb 28
SEA
Seattle
DEN
Denver
CA $179 Roundtrip, just found
CA $179
Roundtrip
just found
Select Alaska Airlines flight, departing Sat, Feb 21 from Seattle to Denver, returning Sat, Feb 28, priced at CA $179 just found
Thu, Mar 5 - Tue, Mar 10
SEA
Seattle
DEN
Denver
CA $188 Roundtrip, found 4 days ago
CA $188
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Thu, Mar 5 from Seattle to Denver, returning Tue, Mar 10, priced at CA $188 found 4 days ago

Frequently asked questions

Are there direct flights from Seattle - Tacoma Intl. Airport (SEA) to Denver Intl. Airport (DEN)?
Your next incredible adventure is on the opposite side of a single flight. You can travel direct from Sea-Tac Airport to DIA airport with multiple airlines, including United Airlines and Southwest Airlines.
What airlines fly from SEA to DEN?
If you're eager to fly direct from SEA to Denver Intl. Airport (DEN), you won't have a problem finding a fare. Listed below are the most in-demand airlines that will fly you straight to Denver:

  • United Airlines - (UA) with 182 flights every month
  • Southwest Airlines - (WN) with 178 flights every month
  • Alaska Airlines - (AS) with 121 flights every month
  • Delta - (DL) with 121 flights every month

What is the best day to buy a plane ticket?
Airfares offered on Friday tend to be the cheapest, according to flight demand on Travelocity.ca in 2021. Purchasing your airfares on a Thursday or Saturday can also provide better value, however our advice if you're looking to save money is to avoid booking on a Wednesday or Sunday. Our data shows that those two days have the highest ticket values on average, so keep this in mind if you're browsing flight deals.
What are the cheapest days to fly?
Frequent travellers may already know this, but earlier in the week is often the cheapest time to fly. Flights departing on a Monday are the cheapest of the week. Since flights towards the middle of the week tend to be more popular, this causes the prices to rise. This is why, on average, airfares booked on Travelocity.ca in 2021 were most expensive for Wednesday departures.
How far in advance can you book a flight?
Here's the deal: It is typically possible to start comparing international airfares on Travelocity.ca up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 2-4 weeks prior to their travel dates.*According to flight demand on Travelocity.ca from January to December 2021. Savings are subject to change and may vary depending on selections made.

Popular Flight Routes from Seattle (SEA)

Travelers at SEA love to visit these top cities. Roam to the top destinations from Seattle (SEA) today with the cheap prices from Travelocity!

Popular Flight Routes from Denver (DEN)

Travelers at DEN love to visit these top cities. Roam to the top destinations from Denver(DEN) today with the cheap prices from Travelocity!

*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.