AirHint found the following cheapest return flights from London (LON) to Bucharest (OTP) in December 2026 (see full year).

Return flights

05 Dec - 10 Dec	Ryanair	direct
05 Dec - 14 Dec	Ryanair	direct
05 Dec - 17 Dec	Ryanair	direct
05 Dec - 11 Dec	Ryanair	direct
02 Dec - 05 Dec	Ryanair	direct
02 Dec - 08 Dec	Ryanair	direct
02 Dec - 14 Dec	Ryanair	direct
02 Dec - 03 Dec	Ryanair	direct
02 Dec - 10 Dec	Ryanair	direct
02 Dec - 17 Dec	Ryanair	direct
26 Dec - 09 Jan	KLM
25 Dec - 04 Jan	KLM
26 Dec - 13 Jan	Ryanair	direct
22 Dec - 05 Jan	KLM
23 Dec - 05 Jan	KLM
22 Dec - 09 Jan	KLM
26 Dec - 09 Jan	Wizz Air Malta	direct
18 Dec - 05 Jan	KLM
20 Dec - 05 Jan	Air France
20 Dec - 04 Jan	Air France

Also check the deals for one-way 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 return flights from London to Bucharest in December from $96

Return flights