With a powerful snowstorm forecast for the U.S. East on the 22nd–23rd (local time), a large number of flights were canceled.
According to the flight-tracking site FlightAware, as of 5 p.m. Eastern on the 22nd, airlines canceled more than 3,700 domestic and international flights scheduled that day. On the following day, the 23rd, a total of 4,800 flights were also canceled, bringing the two-day total to nearly 9,000 flights.
By airport, those near New York City and Boston were hit the hardest. As of the 23rd, 85% of departures at New York's John F. Kennedy International Airport were canceled, and 95% of departures at New York's LaGuardia Airport, which primarily serves domestic routes, were canceled.
Boston Logan International Airport also saw 92% of departures canceled the same day. At Newark Liberty International Airport in New Jersey, 77% of departures on the 23rd were expected to be canceled. Korean carriers including Korean Air Lines, Asiana Airlines, and Air Premia also canceled some flights between major East Coast cities and Incheon during this period.
According to the National Weather Service (NWS), from the afternoon of the 22nd a strong snowstorm with heavy snow and high winds has been battering East Coast cities except those in the Southeast. The powerful snowstorm, accompanied by winds of 20–30 meters per second, is expected to affect New York, Philadelphia, Boston, and other major cities across the Northeast through the evening of the 23rd.
These areas have been under a "blizzard" warning from the morning of the 22nd through the evening of the 23rd. It is the first blizzard warning for New York City in nine years since March 2017.