Cheapest return flights from Denver (DEN) to Porto (OPO), September

Select a price to book. see full year.

Dates, airline, and price
Dates Airline Price
30 Sep 07 Oct Air Canada
22 Sep 29 Sep Air Canada
29 Sep 06 Oct Air Canada
23 Sep 30 Sep Air Canada
04 Sep 11 Sep Scandinavian Airlines
15 Sep 22 Sep Icelandair
01 Sep 08 Sep Icelandair
05 Sep 12 Sep Turkish Airlines
12 Sep 19 Sep Turkish Airlines
26 Sep 03 Oct Turkish Airlines
21 Sep 28 Sep Air Canada
14 Sep 21 Sep Icelandair
28 Sep 05 Oct Air France
08 Sep 15 Sep Icelandair
24 Sep 01 Oct Air Canada
27 Sep 04 Oct Lufthansa
25 Sep 02 Oct Air France
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deals for one-way flights from Denver to Porto in September.

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Updated Jun 3, 2026.

About these fares

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