So fly them to multiple destinations? I was hired 1 year ago and interviewed with ~14 people all living in different locations. That could be paired down, but it won't ever reach the single destination that the OP is referring to.

Yes but it only one face to face meeting is needed in the process to see if someone is using AI to answer interview. The 13 other interviews can then be online.

this is a great suggestion actually!

Nobody is seriously suggesting you perform every interview step in person. The suggestion is to consider doing the last interview in person. It could even be with one other person.

You can always rent a conference room for an hour or so somewhere in between.