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.
AzVision.az
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