AirHint found the following cheapest return flights from London (LGW) to Bucharest (OTP) in September 2025 (see full year).

Return flights

30 Sep - 07 Oct	Wizz Air Malta
29 Sep - 07 Oct	Wizz Air Malta
29 Sep - 30 Sep	Wizz Air Malta
30 Sep - 09 Oct	Wizz Air Malta
30 Sep - 04 Oct	Wizz Air Malta
24 Sep - 01 Oct	Wizz Air Malta
29 Sep - 01 Oct	Wizz Air Malta
30 Sep - 01 Oct	Wizz Air Malta
27 Sep - 21 Oct	Ryanair
29 Sep - 04 Oct	Wizz Air Malta
27 Sep - 20 Oct	Wizz Air UK
24 Sep - 27 Sep	Wizz Air Malta
24 Sep - 29 Sep	Wizz Air Malta
27 Sep - 30 Sep	Wizz Air Malta
26 Sep - 30 Sep	easyJet
28 Sep - 29 Sep	Wizz Air UK
25 Sep - 30 Sep	easyJet
21 Sep - 30 Sep	Mavi Gök Airlines
23 Sep - 30 Sep	easyJet
23 Sep - 24 Sep	Ryanair

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

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 September from 83€

Return flights