Cheapest return flights from Rotterdam to Brussels in September from $336

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

Return flights

25 Sep - 25 Sep transavia
27 Sep - 05 Oct transavia

Also check the deals for one-way flights from Rotterdam 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

Feel free to contact us with any feedback or request another flight research.