AirHint found the following cheapest one-way flights from San Francisco (SFO) to Porto (OPO) in March 2026 (see full year).
One-Way flights
| 17 Mar | FrenchBee | ||
| 11 Mar | Hawaiian Airlines | ||
| 12 Mar | Scandinavian Airlines | ||
| 25 Mar | Hawaiian Airlines | ||
| 26 Mar | Frontier Airlines | ||
| 20 Mar | TAP |
Also check the deals for return flights from San Francisco to Porto in March.
Powered by
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.
Find us on social media