Cheapest one-way flights from Portland to Lisbon in May from $344
AirHint found the following cheapest one-way flights from Portland (PDX) to Lisbon (LIS) in May 2025 (see full year).
One-Way flights
| 09 May | Frontier Airlines | ||
| 15 May | Alaska Airlines | ||
| 17 May | Alaska Airlines | ||
| 31 May | WestJet | ||
| 02 May | British Airways | ||
| 01 May | British Airways |
Also check the deals for return flights from Portland to Lisbon 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.
