“Total cancellations within, into, or out of the United States today: 1,226,” the portal said.
As of 8:30 a.m. EST (01:30 p.m. GMT), another 526 flights were delayed, it added.
Nicole made landfall as a category 1 hurricane in the US state of Florida early Thursday, before weakening to a tropical storm.
Orlando International Airport was the worst affected by the storm. More than 850 flights, or about 90% of the total, were canceled at the airport. Another airport near Orlando – Sanford – reported about 61 cancellations, or 96% of all scheduled flights. In Tampa, more than 80 flights were canceled and almost 60 delayed, FlightAware said.