Cheapest return BOS–IST flights, May

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

Return flights

08 May - 14 May Air France
11 May - 14 May KLM
10 May - 20 May Air France
10 May - 21 May Air France
08 May - 18 May Air France
05 May - 20 May KLM
05 May - 15 May KLM
06 May - 13 May KLM
11 May - 19 May Icelandair
11 May - 20 May Icelandair
20 May - 03 Jun LEVEL
30 May - 13 Jun LEVEL
14 May - 03 Jun LEVEL
19 May - 18 Jun Porter Airlines (Canada) Ltd
31 May - 06 Jun Icelandair
29 May - 06 Jun KLM
14 May - 08 Jun KLM
25 May - 07 Jun KLM
31 May - 30 Jun KLM
19 May - 14 Jun Porter Airlines (Canada) Ltd

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

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