New York's John F. Kennedy International and Newark Liberty International airports opened to arriving flights at 6 a.m. EDT. Departing flights are expected to start at noon. LaGuardia Airport opened to both arriving and departing flights at 7 a.m.
Flight tracking service FlightAware says there are nearly 1,500 cancelled flights on Monday, adding to the nearly 12,000 grounded this weekend. That tops record cancellations seen with a pair of massive snow storms this winter.
There are limited seats for passengers stranded because of Irene. Many flights are full ahead of Labor Day weekend.