AirHint found the following cheapest return flights from London (LHR) to Prague (PRG) in December 2025 (see full year).

Return flights

31 Dec - 09 Jan	British Airways	direct
30 Dec - 10 Jan	British Airways	direct
29 Dec - 07 Jan	British Airways	direct
09 Dec - 16 Dec	Lufthansa
09 Dec - 12 Dec	KLM
10 Dec - 13 Dec	KLM
08 Dec - 12 Dec	KLM
08 Dec - 15 Dec	KLM
29 Dec - 09 Jan	KLM
31 Dec - 06 Jan	KLM
09 Dec - 11 Dec	British Airways	direct
09 Dec - 13 Dec	KLM
31 Dec - 06 Jan	British Airways	direct
09 Dec - 13 Dec	British Airways	direct
02 Dec - 05 Dec	KLM
03 Dec - 10 Dec	KLM
07 Dec - 06 Jan	KLM
07 Dec - 07 Jan	KLM
24 Dec - 07 Jan	SWISS
11 Dec - 15 Jan	SWISS

Also check the deals for one-way flights from London to Prague 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 Prague in December from $149

Return flights