What 70/80's movie ended with a boy & a girl in a flying motor home?

Question

Okay so this is long shot. When I was a kid I watched a movie that I have hunted for over the years. I cannot remember the plot or cast.

What I remember is two children (a boy and a girl) who had to reach somewhere with the assistance of an adult. Somehow they had super powers of a sort. I remember them walking through the carcass of what I would call a huge worm (it reminds me of sand-worms from Frank Herbert's Dune series).

I then remember the ending which is a shot of a flying motor home flying into an amazing sunset scene.

I am not sure if it was a series or movie. The motor home is a generic motor home and not futuristic. I seem to recall that the children made this fly. I seem to remember desert scenes at night. That's it and I hope that someone can help.

Answer 1

It sounds like Escape to Witch Mountain

two children (a boy and a girl) who had to reach somewhere with the
assistance of an adult.

From Wikipedia:

The movie centers upon the brother and sister pair Tony and Tia.... ...they face difficulties stemming from their strange psychic/psionic abilities: Tony can psychokinetically move and control inanimate objects with the aid of his harmonica, while Tia can communicate telepathically to Tony, commune empathically with animals, and experience premonitions. Tia also possesses minor telekinetic abilities.

and

Tia and Tony hide out in a green-and-white Winnebago motor home owned by a crotchety widower named Jason O'Day (Eddie Albert). Initially negative toward the children, Jason gradually begins to recognize their powers and the truth of their story; Tia's vague memories of a disaster at sea intrigue him. He agrees to take the children....

This I do not remember, nor can I find a reference to it:

I remember them walking through the carcass of what I would call a
huge worm

It could just be that I haven't seen the movie for, um, 30-odd years.

But I do remember this:

the ending which is a shot of a flying motor home flying into an
amazing sunset scene.

The movie’s IMDB FAQ confirms:

They drive away, but Deranian and the police follow them in cars while Bolt follows in a helicopter. A few car wrecks later, the camper flies into the air where it travels alongside Bolt's helicopter. The camper lands in a field, and Uncle Bené (Denver Pyle) comes walking out...