Originally Posted by barely_flying

Question about free nights certs. I made a reservation for a night in Paris, and I have a family of three, but the standard award only had rooms with double occupancy. I called the hotel directly asking about buying an upgrade over the phone to a room that could sleep three, but the front desk told me that I should wait for the app to tell me when I can upgrade. After some googling, I understand that Hilton has that 72 hour upgrade via the app sometimes. Now, I have a backup hotel in case this doesn't work, but what are the prices usually like? Should I expect to pay exactly the difference in the rooms? For example I'd be going from a standard king bed room, and would be looking for a paid upgrade to a room with a queen and a sofa bed. I know the rule is to book a room you'd be happy with, but the certificate in summer in Paris is pretty hard to use, to say the least.

Should I call Hilton's reservation line to see if they can help? I was under the impression most hotels can process paid upgrades at the front desk but I guess not this Hilton...

Thanks all.