Cheapest return flights from Seattle to Lisbon in October from $656

Best time to book flights for Seattle (SEA) to Lisbon (LIS) flights at AirHint

AirHint found the following cheapest return flights from Seattle (SEA) to Lisbon (LIS) in October 2025 (see full year).

Return flights

16 Oct - 01 Nov Air Canada
16 Oct - 23 Oct Air Canada
17 Oct - 24 Oct Air Canada
18 Oct - 25 Oct Lufthansa
11 Oct - 18 Oct Icelandair
12 Oct - 19 Oct Icelandair
02 Oct - 13 Oct WestJet
02 Oct - 10 Oct Turkish Airlines

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

Skyscanner

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.

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