Planning a Hotel Stop Between O'Hare and a Milwaukee Meeting: Passenger Priorities: When a Return Address Changes

https://milwaukeeflylimotravel.keystonescope.com/posts/keeping-family-airport-information-with-the-people-traveling-when-one-traveler-leaves-earlier

Use the actual later departure address when the return plan moves. A hotel stop between O'Hare and a Milwaukee meeting is a requested part of the ground itinerary, not a detail to leave implied