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

Return flights

28 Aug - 03 Sep	SWISS
19 Aug - 11 Sep	KLM
27 Aug - 03 Sep	KLM
27 Aug - 10 Sep	SWISS
19 Aug - 10 Sep	SWISS
29 Aug - 03 Sep	SWISS
28 Aug - 04 Sep	SWISS
28 Aug - 11 Sep	SWISS
30 Aug - 03 Sep	KLM
25 Aug - 01 Sep	SWISS
26 Aug - 27 Aug	SWISS
20 Aug - 22 Aug	SWISS
26 Aug - 28 Aug	SWISS
19 Aug - 20 Aug	SWISS
20 Aug - 28 Aug	British Airways
27 Aug - 28 Aug	SWISS
25 Aug - 27 Aug	SWISS
19 Aug - 28 Aug	SWISS
28 Aug - 29 Aug	SWISS
28 Aug - 31 Aug	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.

Book a cheap hotel in Istanbul

Cheap car rent in Istanbul

Cheapest return flights from London to Istanbul in August from 316€

Return flights