Frontier Airlines SJU Terminal This terminal is an essential hub for passengers flying with Frontier, a company renowned for providing a straightforward and effective travel experience, particularly for those looking for reasonably priced options. The airport is equipped with contemporary facilities and services that guarantee seamless passenger operations and is designed to accommodate both domestic and international aircraft. Travelers can use self-service kiosks for expedited processing or the authorized counters in Terminal A for Frontier check-in. The airline staff can help you with any questions you may have about tickets, baggage, or travel details. Passengers can access the cozy waiting spaces with chairs, charging stations, and other amenities as they check in.