AirHint found the following cheapest one-way flights from Seattle (SEA) to Lisbon (LIS) in June 2026 (see full year).
One-Way flights
| 07 Jun | Lufthansa | ||
| 14 Jun | WestJet | ||
| 08 Jun | WestJet | ||
| 22 Jun | SWISS | ||
| 15 Jun | SWISS | ||
| 16 Jun | WestJet | ||
| 17 Jun | Air Canada |
Also check the deals for return flights from Seattle to Lisbon in June.
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