About 550 miles, driving distance
The distance between Inverness and Dover is about 642 road miles on the M6.
178 miles
664 miles.
The distance between Cardiff, UK and Abergavenny, UK is about 32.1 road miles.
3,533 miles if a direct route
The total distance, as the crow flies, between Florida and Cardiff, UK is 4,267 miles, or 6,867 kilometres.
It is 649 miles according to Google Maps.
Stirling to Inverness is 144 miles.
4,339 miles. 6,984 kilometers.
It is 4,306 air miles between Oklahoma City and Inverness Scotland.
The air distance from Belfast, Northern Ireland, to Inverness, Florida, is 4,097 miles. That equals 6,592 kilometers or 3,560 nautical miles. I suspect that this questioner is asking about Inverness, Scotland. It isn't possible to drive directly because Belfast is in Ireland and entails a ferry trip to Stranraer. The mileage from Stranraer to Inverness is about 260 miles.
Cardiff to Glasgow is about 400 miles.