Cheapest return flights from Seattle to Lisbon in April from 646€

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 April 2025 (see full year).

Return flights

01 Apr - 30 Apr Aer Lingus
15 Apr - 13 May British Airways
13 Apr - 20 Apr Air Canada
24 Apr - 01 May British Airways
25 Apr - 02 May Icelandair
04 Apr - 15 Apr United
11 Apr - 16 Apr Air Canada
05 Apr - 12 Apr Air Canada
03 Apr - 13 Apr Aer Lingus

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

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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