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

Return flights

15 Jan - 01 Feb	KLM
28 Jan - 01 Feb	KLM
29 Jan - 01 Feb	KLM
15 Jan - 18 Jan	KLM
10 Jan - 25 Jan	KLM
08 Jan - 13 Jan	KLM
13 Jan - 17 Jan	KLM
21 Jan - 30 Jan	KLM
14 Jan - 18 Jan	KLM
13 Jan - 18 Jan	KLM
23 Jan - 30 Jan	KLM
21 Jan - 31 Jan	KLM
23 Jan - 31 Jan	KLM
13 Jan - 11 Feb	KLM
16 Jan - 04 Feb	KLM
28 Jan - 04 Feb	KLM
30 Jan - 03 Feb	KLM
30 Jan - 02 Feb	KLM
29 Jan - 10 Feb	KLM
23 Jan - 12 Feb	KLM

Also check the deals for one-way flights from London 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.

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Cheapest return flights from London to Istanbul in January from 165€

Return flights