It's impossible to fly from RSW (Ft Myers, FL) to Japan (KIX) in a single day, so I booked an itinerary that gets me into SFO at 22:05, with my flight to KIX leaving at 11:00 the next morning. I thought that there was a rule allowing overnights with a GPU when you were taking the next possible connecting flight and/or the next flight was within 12 hours. (This one is 12 hrs 5 minutes, though....). Also, I sort of remember the 12 hour limit being raised to 24 hours. At any rate, the MP agent (Tokyo) stated that GPUs can only be used for same-day travel. I looked on the UA site and can find no info concerning time restrictions on their info page: https://www.united.com/web/en-US/content/mileageplus/premier/swupgrades.aspx Asking "Alex" got me nowhere. Does anyone know what the rule is (if there is one) and where it is published?? I did, BTW, decide to use a RPU for the RSW-SFO segments since the agent discovered that I have some that are expiring and would have been useless otherwise, but I'd like to know for future reference.