Icy conditions have forced staff to close Vienna International Airport until at least 11 a.m. (10:00 GMT) on Tuesday and limit fights at Prague's Vaclav Havel Airport, both hubs said, Report informs via Reuters.
A thick layer of ice had formed on runways in Vienna and kept freezing up again after efforts to clear it, a spokesperson said.
Flights being diverted to other airports, they added.
Freezing rain had left Prague Airport operating in a "very limited mode", according to a message on its X account.
Delays were expected through the day and arrivals were being restricted as staff worked to de-ice the main runway, it added.