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

Return flights

15 Jul - 26 Aug	Lufthansa
29 Jul - 12 Aug	Air Canada
08 Jul - 22 Jul	SWISS
08 Jul - 15 Jul	SWISS
06 Jul - 16 Jul	Air Canada
08 Jul - 17 Jul	Air Canada
07 Jul - 16 Jul	SWISS
29 Jul - 05 Aug	Air France
31 Jul - 13 Aug	Air Canada
16 Jul - 06 Aug	Delta
09 Jul - 16 Jul	British Airways
23 Jul - 06 Aug	British Airways
28 Jul - 07 Aug	British Airways
02 Jul - 09 Jul	Delta
05 Jul - 22 Jul	Air Canada
05 Jul - 18 Jul	Air Canada
01 Jul - 08 Jul	Air Canada
30 Jul - 06 Aug	Delta
24 Jul - 07 Aug	British Airways
17 Jul - 01 Aug	Lufthansa

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

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.

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Cheapest return flights from San Francisco to Lisbon in July from $661

Return flights