Cheapest return flights from Boston to Istanbul in December from 421€

AirHint found the following cheapest return flights from Boston (BOS) to Istanbul (IST) in December 2025 (see full year).

Return flights

02 Dec - 08 Dec SWISS
01 Dec - 08 Dec SWISS
08 Dec - 15 Dec SWISS
06 Dec - 19 Dec Icelandair
02 Dec - 09 Dec Icelandair
30 Dec - 13 Jan Austrian Airlines
04 Dec - 09 Dec LEVEL
30 Dec - 15 Jan Austrian Airlines
30 Dec - 22 Jan Austrian Airlines
31 Dec - 08 Jan Delta
11 Dec - 15 Jan TAP
30 Dec - 08 Jan Air France
13 Dec - 13 Jan Spirit Airlines
15 Dec - 13 Jan Aer Lingus
08 Dec - 08 Jan KLM
30 Dec - 15 Jan Turkish Airlines direct
09 Dec - 16 Dec Austrian Airlines
10 Dec - 17 Dec Lufthansa
09 Dec - 17 Dec Lufthansa
02 Dec - 09 Dec Turkish Airlines direct

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

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