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

Return flights

27 Sep - 30 Sep	Ryanair
23 Sep - 26 Sep	Wizz Air UK
23 Sep - 25 Sep	Ryanair
27 Sep - 29 Sep	Ryanair
29 Sep - 01 Oct	Wizz Air Malta
24 Sep - 27 Sep	Wizz Air Malta
30 Sep - 01 Oct	Ryanair
30 Sep - 02 Oct	Ryanair
30 Sep - 30 Oct	Ryanair
29 Sep - 04 Oct	Wizz Air Malta
26 Sep - 02 Oct	Wizz Air
29 Sep - 30 Sep	Ryanair
24 Sep - 25 Sep	Ryanair
26 Sep - 28 Sep	Wizz Air
22 Sep - 29 Sep	Ryanair
22 Sep - 23 Sep	Ryanair
30 Sep - 07 Oct	Vueling Airlines
30 Sep - 03 Oct	Ryanair
22 Sep - 22 Oct	Ryanair
25 Sep - 01 Oct	Vueling Airlines

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.

Book a cheap hotel in Brussels

Cheap car rent in Brussels

Cheapest return flights from London to Brussels in September from $156

Return flights