Do I have to collect my luggage and re-check it for the connecting flight?
Check-in will be able to confirm but I expect so. You have to clear immigration and customs at your first stop in the US. Your internal flight will land at a gate without passport control or customs between it and landside.
I’m flying from Heathrow, UK to Boston, USA, then a connecting flight to Florida, USA. It’s all one booking with same airline for all flights.
Do I have to collect my luggage and re-check it for the connecting flight? Or does the airline transfer it? First time doing this.