Cheapest return flights from Boston to Lisbon in September from 352€

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

14 Sep - 22 Sep Fly Play
04 Sep - 08 Sep Fly Play
25 Sep - 29 Sep Fly Play
04 Sep - 12 Sep Fly Play
08 Sep - 12 Sep Fly Play
11 Sep - 20 Sep Fly Play
05 Sep - 26 Sep Fly Play
10 Sep - 17 Sep Fly Play
17 Sep - 24 Sep Turkish Airlines
30 Sep - 05 Oct Vueling Airlines
25 Sep - 28 Sep Vueling Airlines
25 Sep - 02 Oct TAP direct
20 Sep - 01 Oct Aer Lingus

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.

Book a cheap hotel in Lisbon

Cheap car rent in Lisbon