Cheap flights from San Antonio to Chicago
from 135 US$
From 245 USD — compare hundreds of airlines
The cheapest month is usually 2026-09 · 135 US$
See prices for my dates →Live fares from 100+ sites — free, with no hidden fees.
About this route
Compare flights from San Antonio to Chicago, a about 1,694 km route (around 2h 37m nonstop). We gather live prices from hundreds of airlines and agencies so you can find the cheapest and book on the official site, with no hidden fees. Direct flights are available. Airlines such as American Airlines, United Airlines, Southwest Airlines operate this route.
When to buy and when to fly
Prices by date
Fares found by date — cheapest days in green.
How to get the best price
Airlines on this route
FAQ
What's the cheapest month to fly San Antonio to Chicago?
It's usually 2026-09, from 135 USD. Use the price calendar to compare other dates.
How long is the flight from San Antonio to Chicago?
A nonstop flight takes about 2h 37m and covers around 1,694 km. Connecting itineraries take longer.
Are there direct flights from San Antonio to Chicago?
Yes, this route has nonstop flights. Filter by "nonstop" to see them.
Which airlines fly from San Antonio to Chicago?
American Airlines, United Airlines, Southwest Airlines operate this route, among others. Compare them all in the results.
When should I book San Antonio–Chicago flights?
As a rule of thumb, booking 3–8 weeks ahead and avoiding weekends and holidays tends to give the best prices. Use the calendar to spot the cheapest dates.
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San Antonio → Chicago · Live fares from 100+ sites — free, with no hidden fees.