The route of the flight from departure to destination decides the price of first class seating when one can fly from Miami. These reasons are not enough to set the exact cost of First Class Flights to Miami, and there are more factors. Generally, ticket prices fluctuate every single day, so guessing the accurate price is difficult, but the domestic 1st class cost is around $4,500, and the same as that international flight costs around $8,900. To know more about it, visit the official website or read the mentioned blog of FaresFirstClass.