Hi We are staying at Hilton Blue Lagoon Miami for 1 night on 21Dec 2019 We are landing at Miami airport at 9pm Does anyone know how late we can arrive and check in just in case of delays either in the Uk or at security in US.

You can check in at time. There is limited but pricey room service

What Hymar Priscilla answered is correct.

Any time

Doesn't matter. You can call when you arrive to the airport or today to advice this. Take the bus from the hotel at the airport (Gate 5 or 6) Enjoy

There's always someone at the desk for you to check in. If you're catching a connecting flight in the morning try to be at the front door by 4:45am because the first shuttle fills up quick