How reliable is San Antonio International Airport?
Flights from SAT departed within 15 minutes of schedule in 82% of 235,220 flights in official BTS history — and weather is calmest in Sep. Here’s the full picture before you book.
Reliability score
on-time, cancellations & delays
Weather favorability
year-round climate
Origin-airport operations
What the departure punctuality at SAT looks like
On-time departures
across 235,220 flights
Source: BTS Airport Operations · data through 2026-10-08. Role-specific BTS departure history; advisory context, not a guarantee for any flight.
Weather by month
When the weather works for you at San Antonio
A calm-weather score (0–100) for each month from decades of airport observations — how often conditions disrupt flying, not temperature. Higher is calmer.
Calmest month
Calmest flying weather of the year · 99/100 favorability
Roughest month
Most disruptive — low visibility & fog, thunderstorms · 87/100 favorability
The read on SAT
What the numbers say about flying through San Antonio International Airport
Across official performance history, flights from San Antonio left within 15 minutes of schedule about 82% of the time over 235,220 flights. That's a solid, better-than-average operational record. Pair it with a moderate cancellation rate of 1.4%. When a departure does run late, the typical delay is around 11 minutes.
On weather, San Antonio is an unusually calm-weather airport year-round. September is the calmest stretch for flying, scoring 99 out of 100 for favorable conditions, while January is the most disruptive at 87, driven mainly by low visibility & fog and thunderstorms. The year is relatively steady, so no single month stands out as one to avoid on weather alone.
None of this guarantees your specific flight — it’s the backdrop. To turn it into a booking, score real flights to San Antonio, read how we weigh it all in how the Peace of Mind Score works, and brush up with how to pick a reliable flight and avoiding weather delays.
Common questions about SAT
- How reliable is San Antonio International Airport (SAT)?
- Flights from San Antonio left within 15 minutes of schedule roughly 82% of the time across 235,220 flights of official history — a solid, better-than-average operational record. The cancellation rate runs about 1.4%. It's advisory context, not a guarantee for any single flight.
- What is the best month to fly from SAT for good weather?
- September has the calmest flying weather at San Antonio International Airport. January is the most disruptive, mainly from low visibility & fog and thunderstorms.
Peace of Mind
Where to stay in San Antonio
Hotels scored on cleanliness, location, price fairness, and trust — not just stars.
Reliability guides
Planning a trip through San Antonio?
Score real flights to and from SAT on reliability, weather, and connection safety — not just price.
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