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

Return flights

04 Dec - 07 Dec	Eurowings
02 Dec - 16 Dec	Eurowings
02 Dec - 07 Dec	British Airways
05 Dec - 08 Dec	SWISS
05 Dec - 07 Dec	British Airways
11 Dec - 13 Dec	Eurowings
11 Dec - 16 Dec	Eurowings
02 Dec - 10 Dec	Eurowings
01 Dec - 07 Dec	Brussels Airlines
10 Dec - 17 Dec	Eurowings
29 Dec - 08 Jan	Eurowings
29 Dec - 22 Jan	Eurowings
11 Dec - 09 Jan	Eurowings
31 Dec - 21 Jan	Eurowings
12 Dec - 13 Jan	Eurowings
15 Dec - 07 Jan	British Airways
08 Dec - 11 Jan	Eurowings
27 Dec - 11 Jan	Eurowings
29 Dec - 07 Jan	Eurowings
07 Dec - 08 Jan	British Airways

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

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 December from $232

Return flights