There are most likely no direct flights on the Chicago — San Antonio route
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A non-stop flight is the most convenient and comfortable way to fly from Chicago to San Antonio, despite the fact that sometimes flights with transfers can cost significantly less.
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There are most likely no direct flights on the Chicago — San Antonio route
Chicago — San Antonio
06/14/2026
Departure
Direct flight
UA2844
starting at $619
Chicago — San Antonio
07/29/2026
Departure
Direct flight
UA490
starting at $199
starting at $199
starting at $122
Flights from Chicago to San Antonio are operated by several airlines — United Airlines and Frontier Airlines. This allows passengers to flexibly choose flights based on departure time, cost, and additional services. The minimum ticket price starts at $122, making this destination accessible to travelers with different budgets. We help compare all available options in real time, so you can book tickets at the best value for money. The service ensures transparent search and lets you book affordable flights in just a few clicks.
The cheapest one-way flight from Chicago to San Antonio departs on 07/29/2026, is operated by Frontier Airlines and costs $122
There is no information about the cheapest roundtrip flight from Chicago to San Antonio
Fastest flight from Chicago to San Antonio takes 13h 22m
There are direct flights on this route 2 days a week: Su and We
The distance between Chicago and San Antonio is 1694km (1050 miles). There are 15 direct flights from Chicago to San Antonio. Chicago and San Antonio are in the same time zone. Flights from Chicago begin at 9:05 AM. The latest flight from Chicago departs at 9:00 PM
The cheapest flight ticket from Chicago to San Antonio according to data for the last 48 hours costs $122
Often the best time to buy tickets from Chicago to San Antonio is 2 months before departure.
Based on statistics over the past years, the lowest prices for flights from Chicago to San Antonio can be found flying in these months: July, June.
The fastest flights from Chicago to San Antonio start from 13 hours 22 minutes in the air.
The following airlines operate direct flights on the route Chicago — San Antonio: United Airlines
The cost of a one-way flight from Chicago to San Antonio ranges from $121 (July 2026) to $138 (June 2026). On average, the ticket price is about $130–$138.
We couldn't find any special offers for flights from Chicago to San Antonio