Cheapest return flights from San Francisco to Lisbon in August from $685

Best time to book flights for San Francisco (SFO) to Lisbon (LIS) flights at AirHint

AirHint found the following cheapest return flights from San Francisco (SFO) to Lisbon (LIS) in August 2025 (see full year).

Return flights

04 Aug - 30 Sep Air Canada
20 Aug - 27 Aug Air Canada
19 Aug - 26 Aug SWISS
21 Aug - 28 Aug Air Canada
14 Aug - 21 Aug United
18 Aug - 25 Aug SWISS
13 Aug - 20 Aug Delta
27 Aug - 03 Sep Air Canada
23 Aug - 03 Sep Air Canada
16 Aug - 23 Aug British Airways
05 Aug - 12 Aug KLM
26 Aug - 02 Sep KLM
12 Aug - 19 Aug Air Canada
28 Aug - 04 Sep Air Canada
24 Aug - 31 Aug Scandinavian Airlines
25 Aug - 01 Sep SWISS
04 Aug - 30 Sep TAP direct
27 Aug - 03 Sep TAP direct
30 Aug - 06 Sep United
25 Aug - 01 Sep TAP direct

Also check the deals for one-way flights from San Francisco to Lisbon in August.

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

Book a cheap hotel in Lisbon

Cheap car rent in Lisbon