From my experience, Brussels Airlines does offer student discounts, but they might not be as prominently advertised as some other airlines. Typically, these discounts can provide a notable saving, but the percentage can vary based on the route and time of booking. To take advantage of these offers, you usually need to book through their dedicated student portal or with a student travel agency like STA Travel.
You'll also likely need to provide proof of student status, such as a university ID card or proof of enrollment. As for restrictions, student tickets often have more flexible change policies, but it's always a good idea to check the specific terms before booking.
For further details, I'd recommend checking directly with Brussels Airlines or a trusted student travel agency for the most accurate and up-to-date information. Safe travels!