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

Return flights

01 Sep - 04 Sep	Wizz Air Malta
02 Sep - 04 Sep	Vueling Airlines
03 Sep - 04 Sep	Vueling Airlines
23 Sep - 24 Sep	Ryanair
23 Sep - 25 Sep	Ryanair
17 Sep - 18 Sep	Ryanair
11 Sep - 16 Sep	Wizz Air Malta
12 Sep - 14 Sep	Ryanair
15 Sep - 18 Sep	Ryanair
07 Sep - 10 Sep	Ryanair

Also check the deals for one-way flights from London to Brussels 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 Brussels in September from $166

Return flights