Cheap Flights from Denver to Sintra

View €407 flight on Mon, 1 Sep 2025Opens in a new window

Popular airlines from Denver to Sintra

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Cheap flights from Denver to Sintra (DEN-LIS)

Prices were available within the past 7 days and start at €407 for one-way flights and €497 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Icelandair
Sat, 9 Aug - Sun, 24 Aug
DEN
Denver
LIS
Lisbon
€497 Return, found 2 days ago
€497
Return
found 2 days ago
Select Icelandair flight, departing Sat, 9 Aug from Denver to Lisbon, returning Sun, 24 Aug, priced at €497 found 2 days ago
Aer Lingus
Mon, 8 Sep - Wed, 1 Oct
DEN
Denver
LIS
Lisbon
€655 Return, found 5 days ago
€655
Return
found 5 days ago
Select Aer Lingus flight, departing Mon, 8 Sep from Denver to Lisbon, returning Wed, 1 Oct, priced at €655 found 5 days ago
American Airlines
Sun, 24 Aug - Tue, 2 Sep
COS
Colorado Springs
LIS
Lisbon
€669 Return, found 1 day ago
€669
Return
found 1 day ago
Select American Airlines flight, departing Sun, 24 Aug from Colorado Springs to Lisbon, returning Tue, 2 Sep, priced at €669 found 1 day ago
American Airlines
Sun, 24 Aug - Tue, 2 Sep
COS
Colorado Springs
LIS
Lisbon
€705 Return, found 1 day ago
€705
Return
found 1 day ago
Select American Airlines flight, departing Sun, 24 Aug from Colorado Springs to Lisbon, returning Tue, 2 Sep, priced at €705 found 1 day ago
Delta
Sun, 24 Aug - Tue, 2 Sep
COS
Colorado Springs
LIS
Lisbon
€756 Return, found 1 day ago
€756
Return
found 1 day ago
Select Delta flight, departing Sun, 24 Aug from Colorado Springs to Lisbon, returning Tue, 2 Sep, priced at €756 found 1 day ago
United
Sun, 24 Aug - Tue, 2 Sep
COS
Colorado Springs
LIS
Lisbon
€756 Return, found 1 day ago
€756
Return
found 1 day ago
Select United flight, departing Sun, 24 Aug from Colorado Springs to Lisbon, returning Tue, 2 Sep, priced at €756 found 1 day ago

Find the cheapest month to fly from Denver (DEN) to Lisbon (LIS)

November is typically the cheapest month to fly

From €410 - €1,086 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.