Which departure time was most reliable for STT to ORD?
Only Afternoon met the STT-to-ORD departure window threshold: 67.5% of 255 scheduled flights arrived on time during July 2025–June 2026.
| Departure window | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Afternoon | 255 | 67.5% | 18.4% | 1.2% |
Which weekday was most reliable for STT to ORD?
Among qualifying STT-to-ORD weekday results, Friday had the highest on-time rate: 90.0% of 30 flights. Sunday was lowest at 48.8% across 43 flights.
| Day | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Monday | 30 | 66.7% | 23.3% | 0.0% |
| Thursday | 35 | 71.4% | 2.9% | 0.0% |
| Friday | 30 | 90.0% | 3.3% | 0.0% |
| Saturday | 64 | 67.2% | 20.3% | 4.7% |
| Sunday | 43 | 48.8% | 30.2% | 0.0% |
Which airline was most reliable for STT to ORD?
Among qualifying STT-to-ORD airline results, United Airlines had the highest on-time rate: 69.0% of 155 flights. American Airlines was lowest at 65.0% across 100 flights.
| Airline | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| United Airlines | 155 | 69.0% | 16.1% | 1.3% |
| American Airlines | 100 | 65.0% | 22.0% | 1.0% |
Which month was most reliable for STT to ORD?
Among qualifying STT-to-ORD month results, December 2025 had the highest on-time rate: 82.4% of 34 flights. January 2026 was lowest at 44.7% across 47 flights.
| Month | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| December 2025 | 34 | 82.4% | 14.7% | 0.0% |
| January 2026 | 47 | 44.7% | 27.7% | 6.4% |
| February 2026 | 47 | 78.7% | 17.0% | 0.0% |
| March 2026 | 61 | 63.9% | 16.4% | 0.0% |
| April 2026 | 35 | 71.4% | 17.1% | 0.0% |
What drove STT to ORD delay minutes?
Late aircraft was the largest recorded STT-to-ORD delay category, accounting for 55.0% of 7,321 BTS-attributed delay minutes during July 2025–June 2026.
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