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

Return flights

30 Sep - 07 Oct	Wizz Air Malta
25 Sep - 29 Sep	Wizz Air UK
27 Sep - 03 Oct	Ryanair
30 Sep - 01 Oct	Wizz Air UK
23 Sep - 03 Oct	Wizz Air UK
23 Sep - 24 Sep	Wizz Air UK
24 Sep - 01 Oct	Wizz Air UK
30 Sep - 03 Oct	Wizz Air Malta
22 Sep - 26 Sep	Ryanair
22 Sep - 29 Sep	Wizz Air UK
22 Sep - 23 Sep	Wizz Air UK
20 Sep - 24 Sep	Ryanair
17 Sep - 24 Sep	Ryanair
22 Sep - 24 Sep	Ryanair
29 Sep - 01 Oct	Wizz Air Malta
27 Sep - 30 Sep	Ryanair
20 Sep - 04 Oct	Ryanair
20 Sep - 27 Sep	Ryanair
20 Sep - 05 Oct	Ryanair
30 Sep - 05 Oct	Wizz Air

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 $123

Return flights