Cheapest return flights from London to Istanbul in December from $240

Best time to book flights for London (LCY) to Istanbul (IST) flights at AirHint

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

Return flights

04 Dec - 10 Dec KLM
05 Dec - 19 Dec KLM
11 Dec - 14 Dec KLM
12 Dec - 19 Dec KLM
03 Dec - 07 Dec KLM
09 Dec - 14 Dec KLM
08 Dec - 19 Dec KLM
01 Dec - 10 Dec Lufthansa
12 Dec - 09 Jan KLM
01 Dec - 07 Dec KLM
22 Dec - 30 Dec Lufthansa
16 Dec - 16 Jan KLM
28 Dec - 04 Jan KLM
17 Dec - 07 Jan KLM
16 Dec - 07 Jan KLM
29 Dec - 02 Jan KLM
29 Dec - 05 Jan KLM
17 Dec - 05 Jan Lufthansa
23 Dec - 06 Jan KLM
19 Dec - 01 Jan KLM

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

Skyscanner

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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