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

Return flights

05 May - 10 May	SWISS
19 May - 03 Jun	SWISS
05 May - 20 May	KLM
01 May - 05 May	SWISS
19 May - 09 Jun	KLM
12 May - 14 May	SWISS
07 May - 09 May	KLM
08 May - 15 May	KLM
12 May - 27 May	SWISS
05 May - 06 May	SWISS
14 May - 18 May	SWISS
15 May - 18 May	SWISS
29 May - 02 Jun	SWISS
27 May - 11 Jun	SWISS
29 May - 05 Jun	Lufthansa
29 May - 01 Jun	Lufthansa
28 May - 02 Jun	KLM
26 May - 01 Jun	Lufthansa
21 May - 02 Jun	Lufthansa
28 May - 01 Jun	Luxair

Also check the deals for one-way flights from London to Bucharest in May.

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 May from 203€

Return flights