Route Reliability
Chicago → San Antonio
ORD–SAT · 1,041 miles · Chicago O'Hare International Airport to San Antonio International Airport
- 75%
- Arrive within 15 minutes
- 9 min
- Average arrival delay
- 1.9%
- Cancelled
- 1,960
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.United Airlines78%957 flights
- 2.American Airlines73%1,003 flights
What the data says
Morning flights do better here.
ORD–SAT flights departing between 6–9 AM arrived on time 94% of the time, versus 29% between 9 PM–12 AM.
Sunday scaries are real for this one.
ORD–SAT flights arrived on time 80% of the time on Tuesdays. On Sundays: 71%.
United Airlines has a slight edge here.
United Airlines arrived on time 78% of the time on this route; American Airlines managed 73%.
Slipping a little lately.
ORD–SAT flights arrived on time 71% of the time over the last three months in the data, compared with 77% in the three months before that.
Best historical flights
Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.
Top flights by on-time rate
More flights on this route
The breakdown
- Mon73%(301 flights)
- Tue80%(260 flights)
- Wed74%(260 flights)
- Thu78%(289 flights)
- Fri77%(288 flights)
- Sat74%(230 flights)
- Sun71%(291 flights)
- 12–3 AM—(1 flights)
- 6–9 AM94%(132 flights)
- 9 AM–12 PM83%(557 flights)
- 12–3 PM76%(559 flights)
- 3–6 PM62%(13 flights)
- 6–9 PM66%(640 flights)
- 9 PM–12 AM29%(17 flights)
Jun 67% → May 70% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 67% | 165 |
| July 2025 | 70% | 162 |
| August 2025 | 75% | 150 |
| September 2025 | 79% | 150 |
| October 2025 | 84% | 179 |
| November 2025 | 84% | 153 |
| December 2025 | 75% | 158 |
| January 2026 | 71% | 138 |
| February 2026 | 84% | 143 |
| March 2026 | 74% | 173 |
| April 2026 | 69% | 171 |
| May 2026 | 70% | 177 |
Same trip, other airports
Keep nerding
Based on 1,960 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.