Cheapest return flights from Boston to Lisbon in September from $377

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

04 Sep - 12 Sep Fly Play
07 Sep - 15 Sep Fly Play
02 Sep - 08 Sep Fly Play
01 Sep - 08 Sep Fly Play
01 Sep - 07 Sep Fly Play
16 Sep - 23 Sep TAP direct
04 Sep - 12 Sep Air France direct
07 Sep - 15 Sep TAP direct
02 Sep - 08 Sep Air France direct
01 Sep - 07 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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