Cheapest return flights from Boston to Lisbon in May from 342€

Best time to book flights for Boston (BOS) to Lisbon (LIS) flights at AirHint

AirHint found the following cheapest return flights from Boston (BOS) to Lisbon (LIS) in May 2025 (see full year).

Return flights

18 May - 23 May Fly Play
04 May - 09 May Fly Play
08 May - 16 May Fly Play
08 May - 12 May Fly Play
11 May - 26 May Fly Play
13 May - 20 May Fly Play
12 May - 20 May LEVEL
05 May - 21 May LEVEL
05 May - 19 May LEVEL
04 May - 21 May LEVEL
27 May - 05 Jun LEVEL
26 May - 04 Jun LEVEL
28 May - 04 Jun LEVEL
18 May - 03 Jun LEVEL
22 May - 02 Jun Fly Play
30 May - 10 Jun LEVEL
29 May - 05 Jun LEVEL
30 May - 08 Jun LEVEL
30 May - 06 Jun LEVEL
25 May - 01 Jun LEVEL

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