Cheapest one-way flights from Portland to San Francisco in May from 67€
AirHint found the following cheapest one-way flights from Portland (PDX) to San Francisco (SFO) in May 2025 (see full year).
One-Way flights
| 03 May | United | direct | |
| 08 May | Frontier Airlines | ||
| 22 May | Alaska Airlines | direct | |
| 08 May | United | direct | |
| 24 May | United | direct |
Also check the deals for return flights from Portland to San Francisco in May.
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.
