Route guide

Chicago to San Antonio (MDW-SAT): Nonstop Upgrade & Award Space

Southwest Airlines flies the MDW to SAT nonstop about 6 times a week. That's enough service to give you a real choice of departures, though premium seats don't sit unclaimed for long. 2LNR watches every MDW to SAT departure for confirmed upgrade and award space and can alert you when a date you're tracking opens up.

Data current as of July 21, 2026, refreshed on an ongoing basis as new schedules and seats are confirmed.

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6
Nonstop flights a week
1,037 mi
Nonstop distance
Free
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Confirmed upgrade & award space on every MDW to SAT departure

2LNR tracks confirmed upgrade and award availability on American, Delta, and Alaska and across 30 airlines, segment by segment, date by date. Open the calendar for Chicago to San Antonio to see which departures have real space, or watch the route and get alerted when space opens.

See real availability

Confirmed upgrade and award seats on each MDW to SAT departure, checked against live inventory so you know what is open before you book.

Set an alert

Premium inventory turns over fast. Watch this route and 2LNR notifies you when space appears on a date you are tracking.

Plan on the map

See MDW to SAT on the interactive route map, with schedules, connections, and route statistics.

Airlines flying Chicago to San Antonio nonstop

Carriers operating MDW to SAT nonstop in the current schedule. 2LNR tracks confirmed upgrade and award space on each of them.

  • Southwest Airlines
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Frequently asked questions about MDW to SAT

How far is San Antonio from Chicago?
MDW to SAT covers about 1,037 miles nonstop. Flight times vary by aircraft and season; each scheduled departure on this page lists its own times.
Which airlines fly nonstop from MDW to SAT?
Southwest Airlines is currently the only airline flying MDW to SAT nonstop. 2LNR tracks confirmed upgrade and award space on every Southwest Airlines departure.
How many flights a week are there from MDW to SAT?
About 6 nonstop flights a week run between Chicago and San Antonio in the current schedule, operated by Southwest Airlines. Frequency shifts by season; the calendar on this page reflects what's currently scheduled.
How do I check upgrade or award availability on MDW to SAT?
Open the MDW to SAT calendar on this page to see confirmed upgrade and award space by date. You can also set an alert on the Chicago to San Antonio route, and 2LNR will notify you when space opens. It's free to start.

Never miss MDW to SAT upgrade or award space

Track confirmed availability, set alerts, and book with confidence. Free to start, no credit card required.

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