Cheapest return flights from London to Brussels in September from $117

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

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

Return flights

22 Sep - 27 Sep British Airways direct
23 Sep - 30 Sep British Airways direct
03 Sep - 05 Sep British Airways direct
26 Sep - 03 Oct British Airways direct
19 Sep - 26 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