Cheapest return flights from San Francisco to Lisbon in May from $670

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 May 2025 (see full year).

Return flights

13 May - 19 May LEVEL
06 May - 20 May SWISS
07 May - 15 May SWISS
13 May - 20 May SWISS
13 May - 23 May Vueling Airlines
12 May - 23 May SWISS
11 May - 21 May British Airways
14 May - 21 May British Airways
04 May - 20 May SWISS
04 May - 18 May SWISS
31 May - 07 Jun Hawaiian Airlines
24 May - 07 Jun Hawaiian Airlines
31 May - 03 Jun Hawaiian Airlines
27 May - 05 Jun Hawaiian Airlines
26 May - 02 Jun WestJet
31 May - 13 Jun Hawaiian Airlines
31 May - 15 Jun LEVEL
29 May - 08 Jun Hawaiian Airlines
29 May - 06 Jun Alaska Airlines
27 May - 03 Jun United

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

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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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