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

Return flights

05 Dec - 09 Dec	SWISS
05 Dec - 07 Dec	SWISS
05 Dec - 08 Dec	SWISS
04 Dec - 07 Dec	SWISS
11 Dec - 15 Dec	SWISS
12 Dec - 17 Dec	SWISS
04 Dec - 08 Dec	KLM
17 Dec - 09 Jan	Lufthansa
12 Dec - 15 Dec	SWISS
18 Dec - 23 Dec	KLM
11 Dec - 13 Dec	SWISS
26 Dec - 05 Jan	Lufthansa
15 Dec - 11 Jan	KLM
24 Dec - 01 Jan	KLM
30 Dec - 01 Jan	KLM
27 Dec - 02 Jan	KLM
27 Dec - 01 Jan	KLM
28 Dec - 02 Jan	SWISS
29 Dec - 03 Jan	Lufthansa

Also check the deals for one-way flights from London to Tallinn 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 Tallinn in December from $267

Return flights