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

Return flights

19 Jun - 02 Jul	Lufthansa
30 Jun - 15 Jul	KLM
26 Jun - 02 Jul	Lufthansa
17 Jun - 16 Jul	Lufthansa
16 Jun - 08 Jul	Lufthansa
18 Jun - 02 Jul	Lufthansa
16 Jun - 16 Jul	Lufthansa
26 Jun - 09 Jul	Lufthansa
18 Jun - 24 Jun	SWISS
24 Jun - 15 Jul	Lufthansa
24 Jun - 08 Jul	Lufthansa
25 Jun - 30 Jun	British Airways
18 Jun - 26 Jun	SWISS
20 Jun - 26 Jun	SWISS
25 Jun - 26 Jun	SWISS
18 Jun - 30 Jun	SWISS
19 Jun - 25 Jun	Lufthansa
17 Jun - 26 Jun	SWISS
17 Jun - 25 Jun	SWISS
19 Jun - 24 Jun	Lufthansa

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

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 June from $399

Return flights