AirHint found the following cheapest one-way flights from San Francisco (SFO) to Lisbon (LIS) in May 2026 (see full year).
One-Way flights
| 10 May | Iberia | ||
| 16 May | Iberia For Level | ||
| 19 May | WestJet | ||
| 18 May | WestJet | ||
| 20 May | WestJet | ||
| 15 May | WestJet | ||
| 17 May | WestJet | ||
| 28 May | WestJet | ||
| 29 May | WestJet | ||
| 24 May | WestJet |
Also check the deals for return 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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