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

Return flights

22 Dec - 29 Dec	Lufthansa
05 Dec - 08 Dec	Lufthansa
12 Dec - 15 Dec	Lufthansa
31 Dec - 05 Jan	SWISS
04 Dec - 09 Dec	KLM
10 Dec - 14 Dec	KLM
11 Dec - 14 Dec	KLM
30 Dec - 06 Jan	KLM
13 Dec - 16 Dec	SWISS
04 Dec - 07 Dec	KLM
19 Dec - 05 Jan	KLM
31 Dec - 02 Jan	KLM
22 Dec - 23 Dec	Lufthansa
19 Dec - 29 Dec	KLM
19 Dec - 02 Jan	KLM
19 Dec - 04 Jan	KLM
21 Dec - 05 Jan	KLM
21 Dec - 04 Jan	KLM

Also check the deals for one-way flights from London to Riga 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 Riga in December from $264

Return flights