Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Newark Airport to North Platte as you normally would.
For a flight from Newark to North Platte, you will be flying into Lee Bird Field. North Platte Lee Bird Field (LBF) is just 3.2 mi from the center of the city. Lee Bird Field is the only North Platte airport and it handles 0 inbound flights from Newark per day. 0 airlines have flights to North Platte Lee Bird Field from Newark on a regular basis.