San Antonio, Texas, is not home to a dedicated Frontier Airlines San Antonio Office . For help with reservations, cancellations, or other travel-related questions, passengers can readily contact customer service via the airline’s website or by contacting their customer service center. The airline provides inexpensive flights to a number of domestic locations, mostly from San Antonio International Airport (SAT). Through Frontier’s web portals, travelers may also manage their reservations, check in, and get flight status updates. Customers in San Antonio can visit the airport for assistance with specific issues or call the general customer service helpline for individualized support.