The pan-European STOXX 600 index rose 0.4pc to a new closing high of 452.57, having earlier hit an all-time high of 452.71. It added 0.8pc for the week.
British airways owner IAG lost 0.9pc after Britain removed Portugal from its quarantine-free travel list and added seven more countries to its red list.
"I'm pretty sure summer is going to be better than where we are today," Varadi told a virtual aviation conference on Friday.
"My view is not demand-driven from the consumer or not supply-driven from the airline, it is the unpredictability of the government actions, and government imposed restrictions."
Wizz Air Abu Dhabi', a joint venture between Wizz Air and Abu Dhabi state holding company ADQ, starts operations on Friday with an inaugural flight to Athens.
It has announced 12 other routes, mostly in Central and Eastern Europe but also to Israel's Tel Aviv and Egypt's Alexandria.