That's an interesting inquiry. I don't honestly know.

Delta is headquartered in GA, which doesn't have any laws requiring companies to share very much with employees on request.

However, it's incorporated in Delaware, which DOES have strong legal protections for employees who want to see their company file.

So...probably?

Anecdotally someone told me about a retiring flight attendant who did this. Supposedly (and take with a HUGE grain of salt) there were two files and he needed a strongly worded letter from an attorney to get the second one.