Cheap Flights from Porto to Aspen

View €641 flight on Wed, 27 Aug 2025Opens in a new window

Popular airlines from Porto 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 Porto to Aspen (OPO-DEN)

Prices were available within the past 7 days and start at €641 for one-way flights and €712 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Lufthansa
Thu, 4 Sep - Wed, 10 Sep
OPO
Porto
DEN
Denver
€712 Return, found 5 days ago
€712
Return
found 5 days ago
Select Lufthansa flight, departing Thu, 4 Sep from Porto to Denver, returning Wed, 10 Sep, priced at €712 found 5 days ago
Lufthansa
Thu, 4 Sep - Wed, 10 Sep
OPO
Porto
DEN
Denver
€716 Return, found 5 days ago
€716
Return
found 5 days ago
Select Lufthansa flight, departing Thu, 4 Sep from Porto to Denver, returning Wed, 10 Sep, priced at €716 found 5 days ago
Air Canada
Thu, 4 Sep - Wed, 10 Sep
OPO
Porto
DEN
Denver
€752 Return, found 5 days ago
€752
Return
found 5 days ago
Select Air Canada flight, departing Thu, 4 Sep from Porto to Denver, returning Wed, 10 Sep, priced at €752 found 5 days ago
United
Thu, 4 Sep - Wed, 10 Sep
OPO
Porto
DEN
Denver
€768 Return, found 5 days ago
€768
Return
found 5 days ago
Select United flight, departing Thu, 4 Sep from Porto to Denver, returning Wed, 10 Sep, priced at €768 found 5 days ago
Brussels Airlines
Thu, 4 Sep - Wed, 10 Sep
OPO
Porto
DEN
Denver
€781 Return, found 5 days ago
€781
Return
found 5 days ago
Select Brussels Airlines flight, departing Thu, 4 Sep from Porto to Denver, returning Wed, 10 Sep, priced at €781 found 5 days ago
KLM
Sun, 7 Sep - Sun, 14 Sep
OPO
Porto
DEN
Denver
€840 Return, found 4 days ago
€840
Return
found 4 days ago
Select KLM flight, departing Sun, 7 Sep from Porto to Denver, returning Sun, 14 Sep, priced at €840 found 4 days ago
*Available to Expedia members.