"Fresh snow is expected to fall around midday and could continue until midnight," a spokesman for the airport said, predicting further flights from the around 1,300 scheduled to be axed during the course of the day.
Germany's biggest airline Lufthansa is advising passengers on domestic German flights to find an alternative means of travel. "In view of the extraordinary situation, Lufthansa electronic flight tickets can be exchanged easily for Deutsche Bahn rail travel vouchers at the customer-operated check-in terminals," the airline said in a statement.
"Passengers affected by flight cancellations should contact the dedicated Lufthansa Call Center set up specially for the purpose. The free phone number to call from Germany is: 0800 850 60 70," it added.
Hundreds of stranded passengers had to spend the night on beds set up in the airport terminals, some for a second night in a row.
Unusually heavy snowfall had already seen hundreds of flights scrapped Friday and Saturday, including several due to severe winter weather at other European airports, as the holiday travel season got underway.
Flag carrier Lufthansa advised passengers to use the German rail service, which was also hit by delays and cancellations.