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

Return flights

13 Dec - 09 Jan	Icelandair
06 Dec - 12 Dec	Icelandair
13 Dec - 23 Jan	Icelandair
06 Dec - 19 Dec	Icelandair
08 Dec - 15 Dec	Air Canada
09 Dec - 16 Dec	Air Canada
10 Dec - 24 Dec	Air Canada
03 Dec - 24 Dec	Air Canada
09 Dec - 15 Dec	Air Canada
31 Dec - 21 Jan	Air Canada
02 Dec - 09 Dec	Air Canada
09 Dec - 23 Dec	Air Canada
02 Dec - 23 Dec	Air Canada
30 Dec - 20 Jan	Air Canada
30 Dec - 13 Jan	Air Canada
23 Dec - 13 Jan	Air Canada
03 Dec - 08 Jan	British Airways
30 Dec - 09 Jan	American Airlines
11 Dec - 22 Jan	Air Canada
31 Dec - 10 Jan	British Airways

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

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.

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Cheapest return flights from Boston to Istanbul in December from $383

Return flights