SFO to SAT flight delays
San Francisco, CA (SFO) San Antonio, TX (SAT) · 1,482 miles
434 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
76.46%
Arrived on time
Within 15 minutes of schedule
0.23%
Cancelled
Share of scheduled flights
73 min
When late, late by
Average across delayed arrivals
18 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The season swings this route hard. In December it ran 23.6 points more punctual than in June — a difference bigger than the one between the best and worst airlines on most routes. If the date is flexible, it is worth more than the carrier.
The two directions do not behave alike. SAT to SFO arrives on time 9.6 points more often than the outbound. Delay accumulates through the flying day, so whichever direction is scheduled later tends to carry the worse record — which is an argument for booking the morning departure if the choice exists.
This is a thin route — 434 flights across the whole period. On a route this infrequent a cancellation is far more costly than the rate suggests, because the next departure may not be the same day.
The 2 airlines here are separated by under 1 point — close enough to call a tie. Choose on price and departure time.
Which airline should you fly on this route?
Over January 2025 – August 2026, United Airlines arrived on time most often on SFO to SAT. SkyWest Airlines was late most often. Flights ran closest to schedule in December and worst in February.
Every airline on SFO to SAT
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| SkyWest Airlines | 325 | 76.32% | 0.31% | 75 min | C |
| United Airlines | 109 | 76.85% | 0% | 68 min | C |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
Other routes from San Francisco
Common questions
Are flights from San Francisco to San Antonio usually delayed?
76.46% of flights on the SFO to SAT route arrived within 15 minutes of schedule, so roughly 2 in every ten arrived late. That is about the same as the average route in this record.
Which airline is most on time from San Francisco to San Antonio?
United Airlines, at 76.85% on time across 109 flights. The least punctual on the route was SkyWest Airlines at 76.32%.
How often are SFO to SAT flights cancelled?
0.23% of scheduled flights did not operate — about 2 in every thousand. That is in the normal range.
What is the best month to fly San Francisco to San Antonio?
December, when 89.1% of flights arrived on time. The worst was June at 65.5%.
When SFO to SAT flights are late, how late are they?
About 73 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on SFO to SAT during January 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →