Cheapest return flights from Lisbon to Boston in May from $559

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

Return flights

15 May - 17 May Iberia
06 May - 14 May Iberia
06 May - 12 Jun Iberia
07 May - 12 Jun Iberia
12 May - 19 May 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
16 May - 21 May Aer Lingus
30 May - 06 Jun Azores Airlines
31 May - 27 Jun Aer Lingus
06 May - 12 Jun TAP direct
07 May - 12 Jun TAP direct
31 May - 27 Jun Virgin Atlantic 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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