The cheapest Brussels to Tunis return flight on the radar right now is €127, flying with Tunisair non-stop. It covers departures in December 2026, and every dated link below opens that exact BRU–TUN search on Skyscanner. At 28% under the €177 we normally record here, it is one of the strongest BRU–TUN fares in our index. Across 85 recorded checks it has ranged between €126 and €364. Our sampling points to December 2026 as the cheapest month to fly Brussels to Tunis.
Prices are re-checked against Skyscanner automatically, and every one shows when it was last confirmed, so nothing here is older than it looks. Not flying from Brussels? We track 52 other departure cities for Tunis, listed at the foot of this page.
Prices like this tend to vanish fast. If it has gone when you look, try the days either side of the dates above, since Brussels to Tunis is often still worth booking within a day or two of the fare we found.