Operating out of San Francisco International Airport's (SFO) Terminal 1 (Harvey Milk Terminal), Frontier Airlines San Francisco International Airport is renowned for its economical tickets and effective services. Modern and environmentally conscious, Terminal 1 offers a smooth travel experience with modern amenities, roomy waiting areas, and a focus on sustainability. With SFO's cutting-edge facilities and Frontier's emphasis on economical travel, travelers can be sure of a comfortable and reasonably priced trip to a variety of domestic locations.