Cheapest return flights from Boston to Lisbon in May from $341

AirHint found the following cheapest return flights from Boston (BOS) to Lisbon (LIS) in May 2026 (see full year).

Return flights

04 May - 08 May TAP
05 May - 12 May TAP direct
10 May - 18 May Air Canada
10 May - 20 May Air Canada
18 May - 01 Jun Condor
20 May - 25 May Air Canada
11 May - 19 May Scandinavian Airlines
14 May - 18 May Condor
12 May - 19 May LEVEL
08 May - 16 May Scandinavian Airlines
02 May - 10 May Icelandair
21 May - 01 Jun Air Canada
25 May - 01 Jun Scandinavian Airlines
20 May - 03 Jun Scandinavian Airlines
31 May - 07 Jun Aer Lingus
20 May - 06 Jun TAP
28 May - 14 Jun Aer Lingus
21 May - 01 Jun TAP direct
20 May - 03 Jun Virgin Atlantic direct
25 May - 01 Jun Air France direct

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

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