Cheapest return flights from Boston to Istanbul in May from $632

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

Return flights

14 May - 17 May Icelandair
21 May - 26 May Scandinavian Airlines
14 May - 28 May Icelandair
07 May - 08 Jun KLM
07 May - 08 Jun Turkish Airlines direct
29 May - 06 Jun KLM
14 May - 28 May Turkish Airlines direct
21 May - 26 May Turkish Airlines direct
11 May - 25 May Turkish Airlines direct
14 May - 17 May Turkish Airlines direct
29 May - 06 Jun Turkish Airlines direct

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

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