Cheapest return flights from Seattle to Lisbon in August from 567€

AirHint found the following cheapest return flights from Seattle (SEA) to Lisbon (LIS) in August 2026 (see full year).

Return flights

09 Aug - 19 Aug Air Canada
04 Aug - 11 Aug Aer Lingus
03 Aug - 11 Aug Aer Lingus
04 Aug - 12 Aug Aer Lingus
05 Aug - 13 Aug Air Canada
05 Aug - 12 Aug Lufthansa
02 Aug - 10 Aug Lufthansa
03 Aug - 10 Aug Air Canada
06 Aug - 13 Aug Air Canada
06 Aug - 14 Aug Air Canada

Also check the deals for one-way flights from Seattle to Lisbon in August.

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