I think the best you will do is to check in as early as you can the day of flight, as
andrzej mentioned.
Originally Posted by emcat
I and the family are flying into BOS at around 7pm one day and leaving the next day at 6pm (23 hours after arrival), onto CDG.
Does anyone have any experience checking-in at the airport after the 24 hour mark, even if it's done the day before the flight?
Would this help at all in getting a VIP upgrade for non-status pax that are travelling with me?