Cheapest return flights from Boston to Lisbon in September from 364€

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 September 2025 (see full year).

Return flights

18 Sep - 22 Sep Fly Play
03 Sep - 10 Sep Fly Play
23 Sep - 30 Sep TAP direct
01 Sep - 09 Sep Air Canada
18 Sep - 22 Sep TAP direct
01 Sep - 09 Sep TAP direct
02 Sep - 09 Sep TAP direct
03 Sep - 10 Sep TAP direct

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

Skyscanner

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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