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 $214 round trip and CA $110 one way. Prices and availability subject to change. Additional terms may apply.

Fri, Mar 6 - Mon, Mar 9
SEA
Seattle
DEN
Denver
CA $214 Roundtrip, found 1 day ago
CA $214
Roundtrip
found 1 day ago
Select Delta flight, departing Fri, Mar 6 from Seattle to Denver, returning Mon, Mar 9, priced at CA $214 found 1 day ago
Fri, Mar 6 - Mon, Mar 9
SEA
Seattle
DEN
Denver
CA $214 Roundtrip, found 1 day ago
CA $214
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Fri, Mar 6 from Seattle to Denver, returning Mon, Mar 9, priced at CA $214 found 1 day ago
Wed, Mar 4 - Wed, Mar 11
SEA
Seattle
DEN
Denver
CA $219 Roundtrip, found 4 days ago
CA $219
Roundtrip
found 4 days ago
Select Delta flight, departing Wed, Mar 4 from Seattle to Denver, returning Wed, Mar 11, priced at CA $219 found 4 days ago
Wed, Apr 29 - Tue, May 12
SEA
Seattle
DEN
Denver
CA $228 Roundtrip, found 10 hours ago
CA $228
Roundtrip
found 10 hours ago
Select Alaska Airlines flight, departing Wed, Apr 29 from Seattle to Denver, returning Tue, May 12, priced at CA $228 found 10 hours ago
Mon, Mar 9 - Mon, Mar 9
SEA
Seattle
DEN
Denver
CA $228 Roundtrip, found 1 day ago
CA $228
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Mon, Mar 9 from Seattle to Denver, returning Mon, Mar 9, priced at CA $228 found 1 day ago
Sat, Feb 28 - Sat, Mar 7
SEA
Seattle
DEN
Denver
CA $230 Roundtrip, found 4 days ago
CA $230
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Sat, Feb 28 from Seattle to Denver, returning Sat, Mar 7, priced at CA $230 found 4 days ago
Sat, Feb 28 - Fri, Mar 6
SEA
Seattle
DEN
Denver
CA $232 Roundtrip, found 3 days ago
CA $232
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Sat, Feb 28 from Seattle to Denver, returning Fri, Mar 6, priced at CA $232 found 3 days ago
Wed, Mar 4 - Wed, Mar 11
SEA
Seattle
DEN
Denver
CA $232 Roundtrip, found 4 days ago
CA $232
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Wed, Mar 4 from Seattle to Denver, returning Wed, Mar 11, priced at CA $232 found 4 days ago
Sat, Feb 28 - Fri, Mar 6
SEA
Seattle
DEN
Denver
CA $233 Roundtrip, found 3 days ago
CA $233
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Sat, Feb 28 from Seattle to Denver, returning Fri, Mar 6, priced at CA $233 found 3 days ago
Sat, Mar 7 - Tue, Mar 10
SEA
Seattle
DEN
Denver
CA $236 Roundtrip, found 1 day ago
CA $236
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Sat, Mar 7 from Seattle to Denver, returning Tue, Mar 10, priced at CA $236 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.