AirHint found the following cheapest one-way flights from San Francisco (SFO) to Lisbon (LIS) in April 2026 (see full year).
One-Way flights
| 27 Apr | Aer Lingus | ||
| 21 Apr | Hawaiian Airlines | ||
| 14 Apr | Aer Lingus | ||
| 07 Apr | Aer Lingus | ||
| 29 Apr | Frontier Airlines | ||
| 30 Apr | Frontier Airlines | ||
| 25 Apr | FrenchBee | ||
| 09 Apr | Aer Lingus | ||
| 22 Apr | WestJet | ||
| 23 Apr | LEVEL |
Also check the deals for return flights from San Francisco to Lisbon in April.
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