Cheapest one-way flights from Seattle to Lisbon in May from $382
AirHint found the following cheapest one-way flights from Seattle (SEA) to Lisbon (LIS) in May 2025 (see full year).
One-Way flights
| 18 May | Alaska Airlines | ||
| 06 May | Icelandair | ||
| 19 May | Icelandair | ||
| 17 May | Frontier Airlines | ||
| 09 May | Icelandair | ||
| 20 May | Icelandair | ||
| 29 May | Alaska Airlines | ||
| 15 May | Frontier Airlines |
Also check the deals for return flights from Seattle 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.
