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

Return flights

31 Jan - 16 Feb	Icelandair
21 Jan - 02 Feb	Icelandair
14 Jan - 04 Feb	Icelandair
14 Jan - 30 Jan	Icelandair
31 Jan - 20 Feb	Icelandair
19 Jan - 11 Feb	Delta
19 Jan - 02 Feb	Delta
20 Jan - 31 Jan	Delta
30 Jan - 20 Feb	KLM
24 Jan - 01 Feb	KLM
30 Jan - 19 Feb	Delta
30 Jan - 23 Feb	Delta
15 Jan - 29 Jan	Icelandair
14 Jan - 21 Jan	Icelandair
15 Jan - 22 Jan	Frontier Airlines
11 Jan - 15 Jan	Icelandair
09 Jan - 23 Jan	KLM
14 Jan - 30 Jan	Turkish Airlines	direct
11 Jan - 16 Jan	KLM
15 Jan - 29 Jan	Turkish Airlines	direct

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

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.

Book a cheap hotel in Istanbul

Cheap car rent in Istanbul

Cheapest return flights from Boston to Istanbul in January from 392€

Return flights