Cheapest return flights from San Francisco to Lisbon in August from $577

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

20 Aug - 27 Aug Delta
13 Aug - 20 Aug Delta
19 Aug - 26 Aug Delta
16 Aug - 31 Aug Delta
11 Aug - 25 Aug Air Canada
15 Aug - 15 Sep Air Canada
18 Aug - 25 Aug Delta
12 Aug - 19 Aug Air Canada
14 Aug - 21 Aug Air Canada
15 Aug - 22 Aug Air Canada
21 Aug - 28 Aug Air Canada
30 Aug - 09 Sep British Airways
26 Aug - 02 Sep Delta
25 Aug - 01 Sep Air Canada
27 Aug - 03 Sep Air Canada
30 Aug - 07 Sep British Airways
28 Aug - 04 Sep Air Canada
27 Aug - 03 Sep TAP direct
28 Aug - 04 Sep TAP direct
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