Flight George Bush Intercontinental Airport departs from Houston George Bush Intercontinental Airport at 17:30 and arrives at New York La Guardia Airport at 21:58.
The flighttime is about 3h 28m. The distance travelled ("as the bird flies"): 2379 Km. So the average speed is roughly 686 Km.
There is an 1 hour time difference between Houston and New York