BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
ORD→SAT

Chicago, IL (ORD) to San Antonio, TX (SAT) flight delay odds

72.8% of 1,966 official scheduled ORD-to-SAT flights arrived on time; 18.0% arrived at least 30 minutes late and 2.0% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALGenerally reliable
72.8%arrived on time
18.0%30+ min late
2.0%cancelled
1,966scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late10.0%all scheduled flights
120+ minutes late3.7%all scheduled flights
Diverted0.3%did not reach as scheduled
Average arrival+8.2 mincompleted flights

Which departure time was most reliable for ORD to SAT?

Among qualifying ORD-to-SAT departure window results, Early morning had the highest on-time rate: 92.2% of 128 flights. Night was lowest at 31.8% across 44 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning12892.2%5.5%0.8%
Late morning56680.2%12.4%1.1%
Afternoon59273.3%17.7%1.9%
Evening63664.8%23.7%3.0%
Night4431.8%45.5%6.8%

Which weekday was most reliable for ORD to SAT?

Among qualifying ORD-to-SAT weekday results, Tuesday had the highest on-time rate: 79.5% of 273 flights. Sunday was lowest at 67.8% across 298 flights.

DayFlightsOn time30+ minCancelled
Monday30473.0%18.4%1.0%
Tuesday27379.5%14.7%1.1%
Wednesday26472.0%20.5%0.8%
Thursday29674.7%15.9%3.0%
Friday29572.9%19.7%1.7%
Saturday23669.9%17.4%3.0%
Sunday29867.8%19.1%3.7%

Which airline was most reliable for ORD to SAT?

Among qualifying ORD-to-SAT airline results, Republic Airways had the highest on-time rate: 78.2% of 101 flights. American Airlines was lowest at 67.0% across 548 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines83374.7%17.4%1.1%
American Airlines54867.0%23.0%2.6%
Envoy Air35274.1%15.9%2.6%
SkyWest Airlines13278.0%10.6%3.0%
Republic Airways10178.2%11.9%4.0%

Which month was most reliable for ORD to SAT?

Among qualifying ORD-to-SAT month results, October 2025 had the highest on-time rate: 83.8% of 179 flights. June 2026 was lowest at 64.4% across 174 flights.

MonthFlightsOn time30+ minCancelled
July 202516766.5%22.8%3.0%
August 202515572.3%18.7%3.2%
September 202515178.1%15.2%0.7%
October 202517983.8%10.6%0.0%
November 202516080.0%11.9%4.4%
December 202516073.8%18.1%1.2%
January 202614367.8%18.9%2.8%
February 202614481.9%7.6%0.0%
March 202617971.5%20.1%3.4%
April 202617566.3%20.6%2.3%
May 202617969.3%24.6%0.6%
June 202617464.4%24.1%2.9%

What drove ORD to SAT delay minutes?

Late aircraft was the largest recorded ORD-to-SAT delay category, accounting for 48.8% of 34,386 BTS-attributed delay minutes during July 2025–June 2026.

Airline27.1%
Late aircraft48.8%
National airspace16.7%
Weather7.2%
Security0.1%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.