Find great value on flights from Calgary to San Antonio with CheapOair! The second largest city in the state of Texas, San Antonio is a beautiful city which is full of historical museums, amusement parks and offers amazing places to shop and dine. River Walk is an amazing area in the city which is awesome to explore in during the day time and fun to party at night and if you are in San Antonio with family make way to San Antonio Zoological Gardens and Aquarium which is home to over 3,500 animals and is open 365 days a year. Whatever type of vacation you are looking for, CheapOair will help you save big on flights to San Antonio!