The passenger looks at the price before selecting the flight, and the first class price is higher than the other classes to Barcelona, Spain, because airlines offer a wide range of services with it. Moreover, the starting price of First Class Flights to Barcelona is different for domestic or international routes; so $2,300 for domestic and $4,300 for international flights. To get more information about it, visit the official website or reach out to the mentioned blog link of FaresFirstClass.