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

Return flights

04 Dec - 07 Dec	KLM
10 Dec - 12 Dec	Air France
04 Dec - 07 Dec	British Airways	direct
10 Dec - 12 Dec	British Airways	direct
12 Dec - 05 Jan	Air France
24 Dec - 27 Dec	Air France
27 Dec - 06 Jan	KLM
27 Dec - 08 Jan	LOT
26 Dec - 07 Jan	LOT
18 Dec - 08 Jan	Scandinavian Airlines
28 Dec - 07 Jan	LOT
27 Dec - 07 Jan	LOT
24 Dec - 28 Dec	Air France
21 Dec - 04 Jan	Air France
23 Dec - 27 Dec	Air France
22 Dec - 29 Dec	LOT
17 Dec - 03 Jan	Air France
22 Dec - 27 Dec	Air France
18 Dec - 03 Jan	Air France
20 Dec - 30 Dec	KLM

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 166€

Return flights