interview ended ~12:30 after lunch. they told me 1 PM latest, so it was all good. most kids had flights at ~7 PM. you have to check in minimum 1 hour prior to takeoff for domestic flights.
depending on traffic, it'll take about 30 min. to cab it to la guardia or JFK (both in queens, JFK maybe bit farther), about $30 fare each way.
good luck.