Cheap Flights from Seattle to Aspen

View €67 flight on Sat, 30 Aug 2025Opens in a new window

Popular airlines from Seattle to Aspen

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Cheap flights from Seattle to Aspen (SEA-DEN)

Prices were available within the past 7 days and start at €67 for one-way flights and €142 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, 30 Aug - Sun, 31 Aug
SEA
Seattle
DEN
Denver
€142 Return, found 4 hours ago
€142
Return
found 4 hours ago
Select Delta flight, departing Sat, 30 Aug from Seattle to Denver, returning Sun, 31 Aug, priced at €142 found 4 hours ago
Delta
Sat, 30 Aug - Sun, 31 Aug
SEA
Seattle
DEN
Denver
€176 Return, found 4 hours ago
€176
Return
found 4 hours ago
Select Delta flight, departing Sat, 30 Aug from Seattle to Denver, returning Sun, 31 Aug, priced at €176 found 4 hours ago
United
Sat, 30 Aug - Sun, 31 Aug
SEA
Seattle
DEN
Denver
€227 Return, found 4 hours ago
€227
Return
found 4 hours ago
Select United flight, departing Sat, 30 Aug from Seattle to Denver, returning Sun, 31 Aug, priced at €227 found 4 hours ago
American Airlines
Sat, 30 Aug - Sun, 31 Aug
SEA
Seattle
DEN
Denver
€303 Return, found 4 hours ago
€303
Return
found 4 hours ago
Select American Airlines flight, departing Sat, 30 Aug from Seattle to Denver, returning Sun, 31 Aug, priced at €303 found 4 hours ago
Alaska Airlines
Sat, 30 Aug - Sun, 31 Aug
PAE
Seattle
DEN
Denver
€668 Return, found 4 hours ago
€668
Return
found 4 hours ago
Select Alaska Airlines flight, departing Sat, 30 Aug from Seattle to Denver, returning Sun, 31 Aug, priced at €668 found 4 hours ago
JetBlue Airways
Sat, 30 Aug - Sun, 31 Aug
SEA
Seattle
DEN
Denver
€723 Return, found 4 hours ago
€723
Return
found 4 hours ago
Select JetBlue Airways flight, departing Sat, 30 Aug from Seattle to Denver, returning Sun, 31 Aug, priced at €723 found 4 hours ago

Find the cheapest month to fly from Seattle (SEA) to Denver (DEN)

January is typically the cheapest month to fly

From €56 - €225 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.