J.W.
Bear in mind that the actual commuting times are a MINIMUM. There's always extra time tacked on for security, check-in, and -- G-d forbid -- getting stuck on the tarmac. all that good stuff:^)
Truthfully, my experience with flying has gotten so sour that I'd suggest taking Amtrak. I will take getting out of Penn Station over trying to escape JFK or LGA any day of the week.
Bon voyage!