Flights St. Louis → San Antonio
STL → SAT
How long is the flight from St. Louis to San Antonio?
The flight from St. Louis (STL) to San Antonio (SAT) takes about 2h. This is an estimate based on the distance between the two airports: the real time depends on the aircraft, wind and any stops.
Route overview
The flight route from St. Louis to San Antonio has a 79% on-time performance rate, with an average delay of 8.3 minutes when flights are not on time. The destination airport in San Antonio, which opened in 1942, serves over nine million passengers annually.
Your rights on this US flight (DOT)
US flights have no statutory cash compensation for delays. Under the US DOT rules, if your flight is cancelled or significantly changed and you decline rebooking, you're owed an automatic refund of the unused ticket. The tarmac-delay limit is 3 hours (domestic) / 4 hours (international). Amenities for controllable delays depend on each airline's contract of carriage.
US flight refund rules & checker →General information, not legal advice.
The St. Louis (STL) → San Antonio (SAT) route is operated by Southwest Airlines. Across 345 flights monitored in recent months, 74% arrived on time (within 15 min of schedule), with an average delay of 13 minutes. The cancellation rate is 0.29%. FlightGuard's average computed risk is 17.8/100 (medium), updated in real time from weather, ATC delays, strikes, NOTAMs, fuel and flight history. At San Antonio the average ATFM delay is 5.5 minutes (main cause: atfm). Departing from St. Louis the average ATFM delay is 5.5 minutes.
Heading to San Antonio: what to expect in this direction
Flying from St. Louis (STL) to San Antonio (SAT) heads south-west for about 1,266 km, a flight time of roughly 2h 0m.
Departures from St. Louis on this leg cluster in the overnight window: about 43% of STL-SAT flights take off then.
Air-traffic congestion: departing St. Louis the average ATFM delay is 5.5 min (atfm); arriving into San Antonio it is 5.5 min (atfm).
Across 345 tracked STL-SAT flights, 74% left on time with an average delay of 13 min and a 0.3% cancellation rate.
Route facts
Flights on this route
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Airline punctuality on this route
| Airline | On-time | Average delay | Cancellations |
|---|---|---|---|
| Southwest Airlines (WN) | 75% | 5 min | 0.3% |
Airlines operating STL-SAT
Airports
Frequently asked questions about STL-SAT
The flight from St. Louis (STL) to San Antonio (SAT) takes about 2h. This is an estimate based on the distance between the two airports: the real time depends on the aircraft, wind and any stops.
On the St. Louis (STL) -> San Antonio (SAT) route, on-time performance is 74% with an average delay of 13 minutes, based on 345 tracked flights.
The cancellation rate on St. Louis-San Antonio is 0.29% across 345 monitored flights.
The route is operated by 1 airline: Southwest Airlines.
Enter your flight number on FlightGuard for a real-time analysis based on 9 factors: weather at San Antonio, ATC delays, strikes, NOTAMs, fuel, airline punctuality and recent trends.
US flights have no statutory cash compensation for delays. Under US DOT rules, if the airline cancels or significantly changes your flight and you decline rebooking, you're owed an automatic refund of the unused ticket. The tarmac-delay limit is 3 hours (domestic) / 4 hours (international). Meals or hotels for controllable delays depend on each airline's contract of carriage.
