Frontier has been rather quiet lately when it comes to new route announcements, but they are still getting plenty of new plane deliveries and my guess is even the full spring schedule is far from done.

So far, it seems PHL-IAH is returning (Frontier did fly this in 2015) starting March 13. The Philadelphia-Trenton flight attendant base is growing from 75 to 150 in 2017, so I would expect a lot more coming from PHL.

MSN-MCO is also new, starting January 5.