Its about a plane that travels through a... "portal" in the sky, only the people sleeping onboard the plane live, when they land on the other side everything has gone bad, except when they bring that object back into their own plane. What I call chompers come, there an alien race that is eating everything up, they need to fuel the plane and get back through the "portal" before they are eaten, one person sacrifices himself for the rest of the people on the plane.

Any help on this movie title would be very nice, been thinking about it for 3-4 months and haven't learnd it

The Langoliers
1995 (Made for TV)

The portal displaced the plane slightly behind the normal flow of time where the Langoliers clean the past up by eating everything (including the ground itself).
Based on a Stephen King Novel
Cast includes Dean Stockwell, David Morse, Mark Lindsay Chapman and Bronson Pinchot with a cameo by Stephen King (watch for the board scene near the end)

From IMDB:

DVD Release Date: 2000-07-25
Republic Pictures
UPC code: 017153100211

Also available in box sets:
Stephen King Horror DVD Collection (Cujo/Golden Years/The Langoliers/The Stand/Thinner)

Stephen King's Golden Years / The Langoliers

Horror Collector's Pack (Cujo/The Langoliers/Thinner)

The Langoliers [Region 2]