Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from New York to Williamsport as you normally would.
Williamsport Lycoming County (IPT), located 4.1 mi from the city center, is the airport you fly into when you book flights from New York to Williamsport. 0 airlines have flights to Lycoming County from New York on a regular basis. Booking flights from New York to Williamsport Lycoming County should not be difficult; the airport handles an average of 0 inbound flights from New York per day.
This is defined as New York John F Kennedy Intl Airport (JFK) and Williamsport Lycoming County Airport (IPT). Codes like Williamsport Lycoming County Airport are often used to just call airports uniquely. Newark Airport (EWR), New York LaGuardia Airport (LGA), New Windsor Stewart Airport (SWF), New York Skyports SPB Airport (NYS) are some additional IATA codes for airports related to your trip.