Cheapest return flights from Boston to Ljubljana in May from $529

AirHint found the following cheapest return flights from Boston (BOS) to Ljubljana (LJU) in May 2026 (see full year).

Return flights

12 May - 27 May Turkish Airlines
06 May - 20 May Delta
18 May - 30 May Lufthansa

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

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