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

One-Way flights

11 Dec	British Airways	direct
02 Dec	British Airways	direct
01 Dec	British Airways	direct
04 Dec	British Airways	direct
03 Dec	British Airways	direct
09 Dec	British Airways	direct
05 Dec	British Airways	direct
08 Dec	British Airways	direct
13 Dec	British Airways	direct
28 Dec	KLM

Also check the deals for return flights from London to Bucharest 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 Bucharest in December from $88

One-Way flights