Cheapest return flights from Lisbon to Boston in May from $561

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

Return flights

06 May - 14 May Iberia
06 May - 12 Jun Iberia
07 May - 12 Jun Iberia
26 May - 07 Jun Finnair
26 May - 08 Jun British Airways
26 May - 06 Jun British Airways
22 May - 25 May Iberia
09 May - 17 May KLM
23 May - 31 May Finnair
09 May - 17 May Virgin Atlantic direct
06 May - 14 May Virgin Atlantic direct
22 May - 25 May Virgin Atlantic direct
07 May - 20 May Aer Lingus
04 May - 11 May Azores Airlines
05 May - 12 May Azores Airlines
31 May - 07 Jun Azores Airlines
30 May - 06 Jun Azores Airlines
31 May - 05 Jun KLM
06 May - 12 Jun TAP direct
07 May - 12 Jun TAP direct

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

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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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