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

One-Way flights

11 Dec	Vueling Airlines
30 Dec	British Airways	direct
27 Dec	British Airways	direct
28 Dec	British Airways	direct
31 Dec	British Airways	direct
15 Dec	British Airways	direct
03 Dec	British Airways	direct
07 Dec	British Airways	direct
14 Dec	British Airways	direct
17 Dec	British Airways	direct

Also check the deals for return 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 one-way flights from London to Budapest in December from $106

One-Way flights