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

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

The cheapest flights to Denver Intl. found within the past 7 days were CA $125 round trip and CA $63 one way. Prices and availability subject to change. Additional terms may apply.

Sat, Dec 6 - Sun, Dec 7
SEA
Seattle
DEN
Denver
CA $125 Roundtrip, found 11 hours ago
CA $125
Roundtrip
found 11 hours ago
Select Alaska Airlines flight, departing Sat, Dec 6 from Seattle to Denver, returning Sun, Dec 7, priced at CA $125 found 11 hours ago
Thu, Dec 4 - Mon, Dec 8
SEA
Seattle
DEN
Denver
CA $155 Roundtrip, found 5 days ago
CA $155
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Thu, Dec 4 from Seattle to Denver, returning Mon, Dec 8, priced at CA $155 found 5 days ago
Sat, Dec 6 - Sun, Dec 7
SEA
Seattle
DEN
Denver
CA $173 Roundtrip, found 11 hours ago
CA $173
Roundtrip
found 11 hours ago
Select Alaska Airlines flight, departing Sat, Dec 6 from Seattle to Denver, returning Sun, Dec 7, priced at CA $173 found 11 hours ago
Sat, Dec 6 - Sat, Dec 13
SEA
Seattle
DEN
Denver
CA $174 Roundtrip, found 2 days ago
CA $174
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Sat, Dec 6 from Seattle to Denver, returning Sat, Dec 13, priced at CA $174 found 2 days ago
Thu, Dec 4 - Sun, Dec 7
SEA
Seattle
DEN
Denver
CA $182 Roundtrip, found 1 day ago
CA $182
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Thu, Dec 4 from Seattle to Denver, returning Sun, Dec 7, priced at CA $182 found 1 day ago
Fri, Dec 12 - Sun, Dec 14
SEA
Seattle
DEN
Denver
CA $183 Roundtrip, found 2 days ago
CA $183
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Fri, Dec 12 from Seattle to Denver, returning Sun, Dec 14, priced at CA $183 found 2 days ago
Sat, Dec 6 - Sun, Dec 7
SEA
Seattle
DEN
Denver
CA $187 Roundtrip, found 11 hours ago
CA $187
Roundtrip
found 11 hours ago
Select Alaska Airlines flight, departing Sat, Dec 6 from Seattle to Denver, returning Sun, Dec 7, priced at CA $187 found 11 hours ago
Tue, Dec 2 - Wed, Dec 3
SEA
Seattle
DEN
Denver
CA $188 Roundtrip, found 21 hours ago
CA $188
Roundtrip
found 21 hours ago
Select Alaska Airlines flight, departing Tue, Dec 2 from Seattle to Denver, returning Wed, Dec 3, priced at CA $188 found 21 hours ago
Thu, Jan 8 - Thu, Jan 15
SEA
Seattle
DEN
Denver
CA $190 Roundtrip, found 4 hours ago
CA $190
Roundtrip
found 4 hours ago
Select Alaska Airlines flight, departing Thu, Jan 8 from Seattle to Denver, returning Thu, Jan 15, priced at CA $190 found 4 hours ago
Fri, Jan 16 - Mon, Jan 19
SEA
Seattle
DEN
Denver
CA $192 Roundtrip, found 1 day ago
CA $192
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Fri, Jan 16 from Seattle to Denver, returning Mon, Jan 19, priced at CA $192 found 1 day 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.
*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.