Cheapest return flights from London to Brussels in September from $124

Best time to book flights for London (LON) to Brussels (BRU) flights at AirHint

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

Return flights

23 Sep - 07 Oct British Airways direct
21 Sep - 25 Sep British Airways direct
18 Sep - 25 Sep British Airways direct
18 Sep - 22 Sep British Airways direct
03 Sep - 10 Sep British Airways direct
06 Sep - 13 Sep British Airways direct
16 Sep - 23 Sep British Airways direct
18 Sep - 21 Sep British Airways direct
10 Sep - 13 Sep British Airways direct
26 Sep - 30 Sep British Airways direct
01 Sep - 10 Sep British Airways direct

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

Skyscanner

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