NEW YORK - Delta Air Lines has canceled about 600 flights for Monday, Jan. 26 due to a "historic" blizzard expected to hit the East Coast, an airline spokesman said on Sunday.Delta has canceled about six regional flights into New York for Sunday, the spokesman added. The airline has issued a waiver for ticket holders for Monday and Tuesday flights, allowing them to reschedule their itineraries for any flight through Friday, Jan. 30. Shortly after, United Airlines announced it will cancel all Tuesday flights at airports in New York, Boston, and Philadelphia, a spokeswoman said.United Airlines will limit operations beginning Monday evening at the Newark, LaGuardia, and John F. Kennedy airports in the New York area. Service at Washington Dulles will be uninterrupted on Monday. United will be waiving flight change fees that would otherwise apply.