Question is about Duda and Szydlo.
Indeed, Tusk was widely criticised for it, and those flights stopped as a result.
People are widely remarking how Tusk can often be seen flying around on Brussels Airlines flights now, while Szydło and Duda need to have their own planes to take them around. Not to mention that one of the first acts of PiS was to order three very expensive new planes to fly them around.