Cheapest return flights from Seattle to Lisbon in May from 565€

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 May 2025 (see full year).

Return flights

17 May - 25 May Icelandair
09 May - 18 May Icelandair
04 May - 14 May Icelandair
10 May - 21 May Aer Lingus
04 May - 10 May Icelandair
04 May - 15 May Icelandair
20 May - 05 Jun Icelandair
07 May - 21 May Icelandair
05 May - 17 May Icelandair
16 May - 24 May Icelandair
11 May - 24 May Icelandair
07 May - 04 Jun Delta
28 May - 15 Jun Turkish Airlines

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

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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