Plane in the air when a sudden polar shift occurs.

[Lyn]

I read this book in the late 70’s

[Trilobyte]

Possibly Icequake 1st published 1979, I can't remember if the plot involves a "plane in the air." Down to a Sunless Sea features survivors in a plane but the disaster is a nuclear war.

[Kris]

Lyn, what's the genre (which we need to add to the header/ topic title) - e.g., for kids, teens or adults? thriller, science fiction, adventure, survival, etc.?

Can you describe the main characters? What else happens in the story? (Spoilers are okay - just give us a clear warning before revealing a spoiler.)

[Andy Phillips]

How about The New Madrid Run? That features a polar shift and one of the main characters is in a small plane when it happens. That's just at the beginning of the book though. It looks like it's published too late though (1998).