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

Return flights

01 Dec - 10 Dec	Aer Lingus
08 Dec - 10 Dec	Aer Lingus
03 Dec - 24 Dec	British Airways	direct
30 Dec - 07 Jan	British Airways	direct
28 Dec - 08 Jan	British Airways	direct
10 Dec - 17 Dec	Aer Lingus
08 Dec - 11 Dec	Aer Lingus
03 Dec - 10 Dec	Lufthansa
01 Dec - 11 Dec	Aer Lingus
10 Dec - 11 Dec	Aer Lingus
02 Dec - 17 Dec	Lufthansa
06 Dec - 11 Dec	SWISS
28 Dec - 07 Jan	British Airways	direct
24 Dec - 08 Jan	Lufthansa
24 Dec - 07 Jan	Lufthansa
01 Dec - 20 Jan	Aer Lingus
01 Dec - 20 Jan	British Airways	direct
04 Dec - 08 Jan	Brussels Airlines
24 Dec - 06 Jan	Lufthansa
12 Dec - 12 Jan	SWISS

Also check the deals for one-way flights from London to Budapest 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 Budapest in December from 149€

Return flights