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

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

The cheapest flights to Seattle - Tacoma Intl. found within the past 7 days were CA $214 round trip and CA $109 one way. Prices and availability subject to change. Additional terms may apply.

Sat, Nov. 1 - Tue, Nov. 4
DEN
Denver
SEA
Seattle
CA $214 Roundtrip, found 6 days ago
CA $214
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Sat, Nov. 1 from Denver to Seattle, returning Tue, Nov. 4, priced at CA $214 found 6 days ago
Mon, Aug. 18 - Mon, Aug. 25
DEN
Denver
SEA
Seattle
CA $218 Roundtrip, found 7 hours ago
CA $218
Roundtrip
found 7 hours ago
Select Alaska Airlines flight, departing Mon, Aug. 18 from Denver to Seattle, returning Mon, Aug. 25, priced at CA $218 found 7 hours ago
Sat, Nov. 1 - Tue, Nov. 4
DEN
Denver
SEA
Seattle
CA $226 Roundtrip, found 6 days ago
CA $226
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Sat, Nov. 1 from Denver to Seattle, returning Tue, Nov. 4, priced at CA $226 found 6 days ago
Sat, Nov. 1 - Tue, Nov. 4
DEN
Denver
SEA
Seattle
CA $228 Roundtrip, found 6 days ago
CA $228
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Sat, Nov. 1 from Denver to Seattle, returning Tue, Nov. 4, priced at CA $228 found 6 days ago
Mon, Aug. 18 - Mon, Aug. 25
DEN
Denver
SEA
Seattle
CA $231 Roundtrip, found 7 hours ago
CA $231
Roundtrip
found 7 hours ago
Select Alaska Airlines flight, departing Mon, Aug. 18 from Denver to Seattle, returning Mon, Aug. 25, priced at CA $231 found 7 hours ago
Sat, Nov. 1 - Tue, Nov. 4
DEN
Denver
SEA
Seattle
CA $237 Roundtrip, found 6 days ago
CA $237
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Sat, Nov. 1 from Denver to Seattle, returning Tue, Nov. 4, priced at CA $237 found 6 days ago
Sat, Nov. 1 - Tue, Nov. 4
DEN
Denver
SEA
Seattle
CA $240 Roundtrip, found 6 days ago
CA $240
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Sat, Nov. 1 from Denver to Seattle, returning Tue, Nov. 4, priced at CA $240 found 6 days ago
Sat, Nov. 1 - Tue, Nov. 4
DEN
Denver
SEA
Seattle
CA $250 Roundtrip, found 6 days ago
CA $250
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Sat, Nov. 1 from Denver to Seattle, returning Tue, Nov. 4, priced at CA $250 found 6 days ago
Thu, Aug. 14 - Mon, Aug. 18
DEN
Denver
SEA
Seattle
CA $258 Roundtrip, found 2 days ago
CA $258
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Thu, Aug. 14 from Denver to Seattle, returning Mon, Aug. 18, priced at CA $258 found 2 days ago
Sat, Sep. 13 - Fri, Sep. 19
DEN
Denver
SEA
Seattle
CA $269 Roundtrip, found 1 day ago
CA $269
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Sat, Sep. 13 from Denver to Seattle, returning Fri, Sep. 19, priced at CA $269 found 1 day ago

Frequently asked questions

Are there direct flights from DIA airport to SEA?
Kick off your escape calm and relaxed and head straight to Sea-Tac Airport from DIA airport. United Airlines and Southwest Airlines are among the airlines that sell direct services on this route.
What airlines fly from DIA airport to Seattle - Tacoma Intl. Airport (SEA)?
With quite a few airlines operating direct flights from Denver Intl. Airport (DEN) to Seattle - Tacoma Intl. Airport (SEA), you shouldn't have a problem finding that perfect fare. Here are some of the top air carriers:

  • 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.