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

Return flights

14 Dec - 19 Dec	British Airways	direct
28 Dec - 02 Jan	British Airways	direct
11 Dec - 15 Dec	British Airways	direct
15 Dec - 18 Dec	British Airways	direct
18 Dec - 26 Dec	British Airways	direct
21 Dec - 29 Dec	British Airways	direct
07 Dec - 14 Dec	British Airways	direct
28 Dec - 31 Dec	British Airways
02 Dec - 17 Dec	KLM
30 Dec - 02 Jan	KLM
24 Dec - 01 Jan	KLM
26 Dec - 30 Dec	KLM
17 Dec - 19 Dec	KLM
24 Dec - 03 Jan	KLM
30 Dec - 03 Jan	KLM
23 Dec - 03 Jan	KLM
19 Dec - 11 Jan	British Airways	direct
20 Dec - 07 Jan	KLM
29 Dec - 03 Jan	KLM
19 Dec - 06 Jan	KLM

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 158€

Return flights