AirHint found the following cheapest return flights from London (LCY) to Istanbul (IST) in July 2025 (see full year).

Return flights

05 Jul - 14 Jul	KLM
01 Jul - 15 Jul	KLM
04 Jul - 15 Jul	KLM
07 Jul - 15 Jul	KLM
03 Jul - 15 Jul	KLM
09 Jul - 15 Jul	KLM
08 Jul - 15 Jul	KLM
01 Jul - 17 Jul	KLM
01 Jul - 09 Jul	KLM
02 Jul - 08 Jul	KLM
29 Jul - 05 Aug	SWISS
22 Jul - 11 Aug	British Airways
30 Jul - 20 Aug	SWISS
21 Jul - 11 Aug	ITA Airways
31 Jul - 20 Aug	British Airways
30 Jul - 13 Aug	ITA Airways
23 Jul - 20 Aug	ITA Airways
22 Jul - 13 Aug	KLM
27 Jul - 27 Aug	KLM
31 Jul - 05 Aug	KLM

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

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 July from $368

Return flights