Cheapest return flights from Boston to Lisbon in September from $419

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

Return flights

28 Sep - 05 Oct Iberia
23 Sep - 30 Sep Iberia
30 Sep - 07 Oct Iberia
29 Sep - 06 Oct Iberia
24 Sep - 28 Sep Iberia
02 Sep - 09 Sep Iberia
25 Sep - 02 Oct Iberia
01 Sep - 05 Sep Scandinavian Airlines
16 Sep - 23 Sep Iberia
17 Sep - 24 Sep Iberia
24 Sep - 01 Oct Iberia
27 Sep - 04 Oct Iberia
18 Sep - 25 Sep Iberia
11 Sep - 19 Sep TAP
25 Sep - 14 Oct Scandinavian Airlines
26 Sep - 03 Oct Iberia
04 Sep - 19 Sep Scandinavian Airlines
13 Sep - 26 Sep Iberia
19 Sep - 10 Oct Scandinavian Airlines
29 Sep - 06 Oct TAP direct

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

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