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

Return flights

06 Dec - 08 Dec	ITA Airways
05 Dec - 11 Dec	ITA Airways
05 Dec - 07 Dec	SWISS
05 Dec - 08 Dec	ITA Airways
01 Dec - 05 Dec	ITA Airways
11 Dec - 15 Dec	ITA Airways
12 Dec - 14 Dec	ITA Airways
10 Dec - 17 Dec	ITA Airways
03 Dec - 07 Dec	Lufthansa
02 Dec - 07 Dec	Lufthansa
16 Dec - 07 Jan	ITA Airways
31 Dec - 05 Jan	ITA Airways
24 Dec - 05 Jan	ITA Airways
24 Dec - 01 Jan	ITA Airways
15 Dec - 29 Jan	ITA Airways
17 Dec - 01 Jan	ITA Airways
29 Dec - 07 Jan	ITA Airways
13 Dec - 11 Jan	ITA Airways
29 Dec - 01 Jan	ITA Airways
28 Dec - 01 Jan	ITA 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 373€

Return flights