The cheapest Rome to Tunis return flight on the radar right now is €132, flying with Tunisair non-stop. It covers departures in January 2027, and every dated link below opens that exact FCO–TUN search on Skyscanner. That is roughly 12% below the €150 this route usually costs. Across 76 recorded checks it has ranged between €125 and €172. Our sampling points to January 2027 as the cheapest month to fly Rome 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 Rome? We track 47 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 Rome to Tunis is often still worth booking within a day or two of the fare we found.