AirHint found the following cheapest one-way flights from London (LON) to Brussels (BRU) in September 2025 (see full year).

One-Way flights

09 Sep	Wizz Air
02 Sep	Wizz Air
30 Sep	British Airways	direct
21 Sep	British Airways	direct
16 Sep	British Airways	direct
02 Sep	British Airways	direct
20 Sep	British Airways	direct
14 Sep	British Airways	direct
13 Sep	British Airways	direct
05 Sep	Wizz Air

Also check the deals for return 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 one-way flights from London to Brussels in September from $57

One-Way flights