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

Return flights

01 Oct - 14 Oct	Lufthansa
01 Oct - 22 Oct	Lufthansa
01 Oct - 08 Oct	Lufthansa
21 Oct - 23 Oct	Lufthansa
01 Oct - 04 Oct	Lufthansa
30 Oct - 02 Nov	Lufthansa
14 Oct - 18 Oct	Lufthansa
08 Oct - 02 Nov	Lufthansa
24 Oct - 26 Oct	KLM
23 Oct - 03 Nov	Lufthansa
05 Oct - 12 Oct	Lufthansa
23 Oct - 02 Nov	Lufthansa
24 Oct - 29 Oct	KLM
17 Oct - 21 Oct	KLM
22 Oct - 01 Nov	KLM

Also check the deals for one-way flights from London to Istanbul in October.

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 October from $358

Return flights