Hundreds of other flights, however, were cancelled.
The airport is the world’s busiest, handling more than 250,000 passengers and almost 2,500 flights every day. But during its first hour of operation on Monday morning, fewer than a dozen commercial flights departed.
A number of cargo flights had operated during the partial shutdown.
Thousands remain stranded in the airport awaiting rescheduled flights. In a statement, the airport said it had distributed more than 5,000 meals to waiting passengers.