Ok what is the straight word. Does one need a passport to fly in and out of St Croix?
Secondly, where is the Economy car rental location at the St Croix airport.
2. What do you mean. Economy as a brand or a company that rents cars at a low price?
This CBP directive explains - note second paragraph.
There is no "Economy Car Rental" here - they're an online agency which steers you towards the least expensive vehicle rentals in worldwide locations:
OT, that car rental site does not cover us.
Economy is really Centerline.
Always remember No Passport...No Country
A diver's license on tells CBP/ Immigration that you are licensed to drive a car in the US State your resided in not that you are a US citizen