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

Return flights

01 Jul - 08 Jul	Lufthansa
03 Jul - 07 Jul	Lufthansa
07 Jul - 09 Jul	Lufthansa
03 Jul - 06 Jul	Lufthansa
01 Jul - 10 Jul	Lufthansa
09 Jul - 23 Jul	KLM
29 Jul - 26 Aug	Lufthansa
06 Jul - 10 Jul	Lufthansa
06 Jul - 13 Jul	Lufthansa
01 Jul - 24 Jul	Lufthansa
21 Jul - 28 Jul	Lufthansa
27 Jul - 31 Aug	KLM
27 Jul - 08 Aug	KLM
20 Jul - 14 Aug	Lufthansa
22 Jul - 02 Aug	KLM
24 Jul - 28 Aug	Lufthansa
23 Jul - 23 Aug	KLM
28 Jul - 15 Aug	KLM
20 Jul - 31 Aug	Lufthansa
21 Jul - 30 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 353€

Return flights