2010 Rockette Auditions and Travel Time to La Guardia?

No way at you can count on making that. Rush hour starts at around 4 PM. By 5 PM, it is the busiest time on the busiest day. It is possible, but you never know. Traffic could be at a stand still or just slow and moving at best. If there is an accident, even a small one, you would be out of luck.