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Flight Reliability

AA 4951 · American Airlines

San Antonio → Los Angeles (SAT–LAX)92% of its flights flew this route. The rest (RST–ORD) are included in these numbers.

92
Nerd Approved
WanderNerd Reliability Score
91%
Arrive within 15 minutes
1 min
Average arrival delay
1.4%
Cancelled
10 min early
Median arrival delay

Based on 358 historical flights. Data through May 2026.

What the data says

Morning flights do better here.

AA 4951 departing between 6–9 AM arrived on time 94% of the time, versus 50% between 6–9 PM.

Friday is doing you no favors.

AA 4951 arrived on time 96% of the time on Saturdays. On Fridays: 81%.

A bit ahead of the SAT–LAX route.

AA 4951 arrived on time 91% of the time, versus 88% across the SAT–LAX route.

Better than the American Airlines network average.

AA 4951 arrived on time 91% of the time, versus 77% across the American Airlines network.

The breakdown

On-time by weekday
  • Mon88%(50 flights)
  • Tue94%(51 flights)
  • Wed94%(52 flights)
  • Thu90%(51 flights)
  • Fri81%(52 flights)
  • Sat96%(45 flights)
  • Sun92%(51 flights)
On-time by departure window
  • 6–9 AM94%(326 flights)
  • 6–9 PM50%(26 flights)
On-time trend by month
90%
May

Jun 97% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202597%30
July 202597%31
August 2025100%31
September 202590%30
October 202597%31
November 202556%25
December 202587%30
January 202685%26
February 202693%27
March 202694%31
April 202697%30
May 202690%30
Departures on time
91%
Diverted
0.3%
Flights flown
352
Months covered
12

Same route, other flights

Keep nerding

Based on 358 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.