The currency used in Miami is the US Dollar.
As this is a modern and popular city, you’ll find that there are ATM machines and foreign exchange facilities around the resort. It may be more convenient to buy your travel money before you leave the UK. You can do this online or from any Thomas Cook store, Find your nearest store here. Both ways are much cheaper than buying it at the airport. If you’re not sure how much money you want to take away with you, then why not check out the Thomas Cook Cash Passport?