My parents are arriving PHL on BA (1st Class so should into passport hall fairly quickly). They have a separately booked flight on US out of the F terminal.

Question is - can they collect there luggage and re-check it at the A terminal check-in desk or do they need to haul it over to the F terminal?

They have 2.5 hours between flights - hopefully this will be enough time but I realize it is tight if BA is delayed. If it is delayed, would the 2-hour flat tire rule allow them to catch a flight the next morning (as the one they are booked on is last of the day)?

Thanks for any help