Cheapest return LIS–BOS flights, May

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

Return flights

13 May - 27 May KLM
20 May - 25 May KLM
20 May - 26 May KLM
08 May - 16 May Air France
25 May - 08 Jun Delta
20 May - 25 May Virgin Atlantic direct
20 May - 26 May Virgin Atlantic direct
01 May - 26 May Air France direct
13 May - 27 May Virgin Atlantic direct
08 May - 16 May Virgin Atlantic direct
25 May - 08 Jun Air France direct
01 May - 08 May Delta
29 May - 30 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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