ORD to SAT flight delays & on-time performance
Nonstop flights from Chicago O'Hare International Airport to San Antonio International Airport · 1,041 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at ORD or SAT right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Chicago (ORD) to San Antonio (SAT) arrived on time 74% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 2% were cancelled, and 11% arrived an hour or more late.
- Republic Airways was the most punctual airline here (82% on time); American Airlines was the least (66%).
- Departures scheduled around 8am did best (93% on time); around 9pm did worst (33%).
- Tuesday was the most reliable day to fly (79% on time) and Sunday the least (71%).
- The largest source of delay minutes was late-arriving aircraft (49%).
Which airline is most on time from ORD to SAT?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Republic AirwaysRegional airline operating flights for American Eagle, Delta Connection and United Express. | 82% | 4.0% | 12 min | 7.3% | 101 |
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 81% | 3.4% | 12 min | 7.1% | 116 |
| Envoy AirRegional airline operating American Eagle flights. | 77% | 2.3% | 14 min | 9.2% | 383 |
| United Airlines | 75% | 1.3% | 19 min | 9.4% | 860 |
| American Airlines | 66% | 2.1% | 28 min | 15.2% | 517 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 8am93%97 flights
- 9am82%510 flights
- 10am72%71 flights
- 1pm78%338 flights
- 2pm74%238 flights
- 3pm71%21 flights
- 6pm69%77 flights
- 7pm66%275 flights
- 8pm68%261 flights
- 9pm33%69 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday74%1.6% cancelled
- Tuesday79%1.8% cancelled
- Wednesday72%0.7% cancelled
- Thursday75%2.4% cancelled
- Friday74%1.3% cancelled
- Saturday73%2.6% cancelled
- Sunday71%3.4% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft49%
- Airline (crew, maintenance, cleaning, fueling)27%
- Air traffic control & airport congestion16%
- Extreme weather8%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather74%
- Air traffic control & airport congestion21%
- Airline (crew, maintenance, cleaning, fueling)5%
- Security0%
ORD to SAT: common questions
- How often are ORD to SAT flights on time?
- 74% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Chicago to San Antonio cancelled?
- 2.0% of scheduled flights were cancelled (39 of 1,977).
- How long are typical delays?
- Across all flights the average arrival delay was 19 min (early arrivals count as zero). Flights that were late arrived 71 min behind schedule on average, and 10.7% of flights were an hour or more late.
- How long is taxi time at ORD?
- Flights on this route spent 28 min taxiing from the gate to takeoff on average.
Related routes
Return trip: SAT to ORD — 77% on time
More flights from Chicago
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: ORD → SAT, nonstop flights by US airlines that report to the DOT. How we calculate this.