Cheapest return flights from San Francisco to Lisbon in May from 556€

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

11 May - 20 May SWISS
08 May - 17 May British Airways
08 May - 12 May British Airways
13 May - 24 May SWISS
04 May - 10 May LEVEL
02 May - 15 May British Airways
07 May - 12 May Air Canada
02 May - 14 May Air Canada
26 May - 02 Jun WestJet
15 May - 24 May SWISS
16 May - 04 Jun Frontier Airlines
10 May - 06 Jun Frontier Airlines
18 May - 07 Jun LEVEL
01 May - 10 May Lufthansa
24 May - 11 Jun LEVEL
28 May - 11 Jun Flair Airlines
16 May - 04 Jun TAP direct
24 May - 11 Jun TAP direct
23 May - 10 Jun British Airways
23 May - 03 Jun SWISS

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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