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

Return flights

30 Aug - 12 Sep	Eurowings
31 Aug - 24 Sep	Eurowings
27 Aug - 06 Sep	Eurowings
28 Aug - 15 Sep	Eurowings
29 Aug - 13 Sep	Eurowings
28 Aug - 08 Sep	Eurowings
31 Aug - 12 Sep	Eurowings
30 Aug - 15 Sep	British Airways	direct
30 Aug - 15 Sep	Eurowings
27 Aug - 13 Sep	Eurowings
24 Aug - 31 Aug	Eurowings
29 Aug - 31 Aug	British Airways
29 Aug - 29 Aug	Eurowings
28 Aug - 29 Aug	Eurowings
27 Aug - 30 Aug	Eurowings
27 Aug - 28 Aug	Eurowings
30 Aug - 31 Aug	Eurowings
31 Aug - 31 Aug	Eurowings
26 Aug - 30 Aug	Austrian Airlines
25 Aug - 30 Aug	Aegean Airlines

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 $239

Return flights