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

Return flights

28 Aug - 15 Sep	KLM
22 Aug - 25 Aug	KLM
01 Aug - 06 Aug	KLM
19 Aug - 01 Sep	KLM
20 Aug - 23 Sep	Lufthansa
13 Aug - 07 Sep	KLM
19 Aug - 31 Aug	KLM
01 Aug - 30 Aug	KLM
20 Aug - 30 Aug	KLM
27 Aug - 30 Aug	KLM
18 Aug - 25 Aug	KLM
15 Aug - 18 Aug	KLM
21 Aug - 04 Sep	KLM
18 Aug - 01 Sep	Lufthansa
17 Aug - 01 Sep	Lufthansa
11 Aug - 05 Sep	KLM
11 Aug - 02 Sep	Lufthansa
12 Aug - 16 Aug	KLM
01 Aug - 08 Aug	KLM
29 Aug - 02 Sep	KLM

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

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 August from 273€

Return flights