Cheap Flights from Seattle to Aspen

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

Popular airlines from Seattle to Aspen

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 15% on select hotels after you book a flight*
  • payments icon

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

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 2 days ago
€142
Return
found 2 days ago
Select Delta flight, departing Sat, 30 Aug from Seattle to Denver, returning Sun, 31 Aug, priced at €142 found 2 days ago
Delta
Mon, 8 Sep - Sat, 13 Sep
SEA
Seattle
DEN
Denver
€143 Return, found 1 day ago
€143
Return
found 1 day ago
Select Delta flight, departing Mon, 8 Sep from Seattle to Denver, returning Sat, 13 Sep, priced at €143 found 1 day ago
American Airlines
Mon, 8 Sep - Sat, 13 Sep
SEA
Seattle
DEN
Denver
€151 Return, found 1 day ago
€151
Return
found 1 day ago
Select American Airlines flight, departing Mon, 8 Sep from Seattle to Denver, returning Sat, 13 Sep, priced at €151 found 1 day ago
United
Mon, 8 Sep - Sat, 13 Sep
SEA
Seattle
DEN
Denver
€177 Return, found 1 day ago
€177
Return
found 1 day ago
Select United flight, departing Mon, 8 Sep from Seattle to Denver, returning Sat, 13 Sep, priced at €177 found 1 day ago
Alaska Airlines
Sat, 30 Aug - Sun, 31 Aug
PAE
Seattle
DEN
Denver
€668 Return, found 2 days ago
€668
Return
found 2 days ago
Select Alaska Airlines flight, departing Sat, 30 Aug from Seattle to Denver, returning Sun, 31 Aug, priced at €668 found 2 days ago
JetBlue Airways
Sat, 30 Aug - Sun, 31 Aug
SEA
Seattle
DEN
Denver
€723 Return, found 2 days ago
€723
Return
found 2 days ago
Select JetBlue Airways flight, departing Sat, 30 Aug from Seattle to Denver, returning Sun, 31 Aug, priced at €723 found 2 days ago

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

January is typically the cheapest month to fly

From €56 - €222 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.