Sandy grounded more than 15,000 flights, including 10 incoming and outgoing flights at Portland International Airport.
The three big New York airports were closed on Tuesday by the Port Authority of New York and New Jersey. Stewart International Airport remained open, but airlines had suspended operations there.
New York has the nation's busiest airspace, with about one-quarter of all U.S. flights traveling to or from there each day. So cancelations here can dramatically impact travel in other cities.
Read more at OregonLive.com.