Cheapest return flights from San Francisco to Lisbon in May from $647

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

04 May - 16 May LEVEL
08 May - 15 May TAP direct
13 May - 20 May LEVEL
03 May - 16 May LEVEL
07 May - 20 May Air Canada
10 May - 20 May Air Canada
03 May - 15 May Air Canada
05 May - 12 May Air Canada
04 May - 11 May LEVEL
03 May - 10 May LEVEL
27 May - 03 Jun Air Transat
31 May - 15 Jun Air Transat
30 May - 12 Jun WestJet
29 May - 11 Jun WestJet

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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