Transit Hotel
A transit hotel sits inside or beside an airport terminal for passengers between flights, and often sells rooms by blocks of hours instead of whole nights.
Large hub airports usually have at least one, and passengers use the term for several things at once. Strictly, a transit hotel sits airside, beyond passport control, so a passenger can sleep without formally entering the country. Loosely, travellers apply it to any hotel attached to or a short walk from the terminal, and to the day-room rates many airport hotels sell by the hour.
Airside or landside
For a booking the distinction is not academic. A room airside of security can only be reached by someone holding a boarding pass, which a visiting therapist does not have. An in-room booking therefore needs a landside room: one reached from the public side of the airport, from the street or the plaza, without crossing a border control. If you are unsure which you have, the hotel's own confirmation usually says whether guests must clear passport control first. Tell the office which it is in your first message; it spares both of you a wasted journey.
Rooms sold by the hour
Day rooms rented for a block of hours are what turn a long connection into something usable. Match the booking to the block, not the other way round. A six-hour day room taken from 10:00 holds a ninety-minute session comfortably if it starts around 12:00, leaving time beforehand to wash off the flight and time afterwards to rest before checkout. Ask the hotel about checkout flexibility before you write to the office, not after.
How the booking works
A transit or terminal hotel is an airport address, so everything runs by arrangement: a start fixed in writing, and half the ladder price sent electronically after acceptance, before she leaves. Two hours confirm with the price of one sent ahead, and the other hour's worth is paid in the room. The guide to Schiphol-area hotel types compares the buildings, and layover sets out how to measure the gap.