Hello! Can the Leona fit as a carry on for airplane?
With the folded dimensions of 55 cm x 45 cm x 32 cm, the Leona can actually fit into the carry-on dimensions of many airlines, yes. However, each airline had a different set of requirements, so be sure to check with them before getting to the airport.
P.S. If the stroller is 1-1.5 cm taller/wider, it usually passes anyway. Just a tip.