The Horror at 37,000 Feet (1973)

Rare TV movie where everything flows together nicely - great acting, tense atmosphere and clean editing.

On a flight from London to Los Angeles, a wealthy architect and his wife have rented out a jumbo jet’s entire cargo hold to transport a precious artifact — an altar from an ancient abbey. But they’re unaware of its deadly secret. Not long after departure, crew and passengers alike face airborne jeopardy and supernatural horror as a demonic entity escapes from the altar, seeking to possess a hapless victim as well as seek revenge on those who would desecrate the sinister deity’s ancient ritual site