Cheapest return SAN–LIS flights, May

AirHint found the following cheapest return flights from San Diego (SAN) to Lisbon (LIS) in May 2026 (see full year).

Return flights

04 May - 19 May United
03 May - 10 May United
04 May - 11 May Lufthansa
27 May - 12 Jun Frontier Airlines
26 May - 04 Jun WestJet
15 May - 21 May Lufthansa
19 May - 26 May Lufthansa
21 May - 04 Jun Alaska Airlines
13 May - 16 May Lufthansa
26 May - 27 May Alaska Airlines
23 May - 03 Jun Delta

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

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