Cheapest return flights from Boston to Ljubljana in September from $401

AirHint found the following cheapest return flights from Boston (BOS) to Ljubljana (LJU) in September 2025 (see full year).

Return flights

01 Sep - 29 Sep SWISS
03 Sep - 10 Sep SWISS
08 Sep - 15 Sep SWISS
10 Sep - 17 Sep SWISS
02 Sep - 11 Sep SWISS
15 Sep - 22 Sep SWISS
30 Sep - 07 Oct SWISS
14 Sep - 21 Sep Lufthansa
19 Sep - 27 Sep Air Canada
20 Sep - 27 Sep SWISS
27 Sep - 04 Oct SWISS
26 Sep - 03 Oct SWISS

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

Cheap car rent in Ljubljana

Feel free to contact us with any feedback or request another flight research.