Cheapest return flights from Seattle to Lisbon in April from 411€

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

Return flights

14 Apr - 21 Apr Delta
28 Apr - 05 May Lufthansa
29 Apr - 06 May Delta
22 Apr - 06 May Lufthansa
27 Apr - 04 May Lufthansa
15 Apr - 20 Apr Lufthansa
12 Apr - 19 Apr British Airways
19 Apr - 26 Apr British Airways
26 Apr - 03 May Lufthansa
06 Apr - 13 Apr Air Canada
06 Apr - 19 Apr Aer Lingus
30 Apr - 12 May Delta
05 Apr - 12 Apr British Airways
02 Apr - 09 Apr Air Canada
08 Apr - 13 Apr United
10 Apr - 19 Apr Delta

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

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