Suppose checkout is at noon, your flight leaves at ten and you plan to leave the hotel at six. Noon to six is the stretch you need to plan. Ask about late checkout if you want to shower, nap or change in the room. If you will spend the afternoon out and only need to collect your bags, ask about storage first.
Work backward from leaving the hotel
Use the day's airport transport and airline requirements to set a departure time. Note when you actually need the room, perhaps at four for a shower and at five thirty to pack. Ask whether the hotel can confirm a six o'clock checkout, whether you can stay in the same room and what it costs. If the desk can only decide on the day, check storage as a backup.

For storage, check the pickup arrangements
Confirm whether bags are kept at reception or another desk, whether there is a charge and when collection ends. Keep your ID and flight essentials with you before handing over the suitcase. Allow time to wait and repack before calling a car. If returning to the hotel adds a detour, compare the route from your last afternoon stop directly to the airport.
Put the four times in one message
Share the checkout, pickup, meeting and departure times with your group. If the hotel can only offer another night, compare the full price with the hours you need. Keep written confirmation of a late checkout with your booking. If you store bags, make sure the person collecting them has the receipt.

