What is the dominant airline in the New York City metro area?

I am planning a trip to NYC soon, and I want to know which airline is dominant in the metro area. Which airline has the largest hub or concentration of flights? Thanks.

Continental is the largest carrier in the New York area. Their hub is at Newark. Delta and JetBlue also have large numbers of flights to NYC. Both have hubs at JFK.

It's not the largest, but jetBlue's home base is JFK.