Difference between IN THE WAY and ON THE WAY
If something is in the way it means it is blocking you and being an inconvenience:
- I can’t see the TV screen, my dog is in the way.
(The dog is standing between you and the TV, and blocking your view)
- There’s not enough room for me to work at this table. Please move your books somewhere else; they’re in the way.
(The books are inconveniently occupying space on the table)
If a person is blocking you, then “Get out of the way!” or “Get out of my way!” is a slightly rude way to tell them to move.
The expression on the way refers to something being conveniently located in your path while you are traveling to a final destination:
- Let’s stop at the supermarket on the way to work.