Which departure time was most reliable for PDX to ORD?
Among qualifying PDX-to-ORD departure window results, Early morning had the highest on-time rate: 81.0% of 938 flights. Afternoon was lowest at 62.4% across 468 flights.
| Departure window | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Early morning | 938 | 81.0% | 7.9% | 0.9% |
| Late morning | 586 | 74.4% | 14.2% | 0.5% |
| Afternoon | 468 | 62.4% | 20.7% | 0.9% |
| Evening | 55 | 69.1% | 14.5% | 0.0% |
| Night | 719 | 80.5% | 11.4% | 1.9% |
Which weekday was most reliable for PDX to ORD?
Among qualifying PDX-to-ORD weekday results, Saturday had the highest on-time rate: 78.4% of 379 flights. Sunday was lowest at 71.5% across 410 flights.
| Day | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Monday | 390 | 75.4% | 12.1% | 1.3% |
| Tuesday | 388 | 77.6% | 9.5% | 0.5% |
| Wednesday | 379 | 76.8% | 12.9% | 0.0% |
| Thursday | 413 | 75.8% | 12.3% | 1.7% |
| Friday | 407 | 77.6% | 12.8% | 1.2% |
| Saturday | 379 | 78.4% | 12.7% | 1.1% |
| Sunday | 410 | 71.5% | 14.6% | 1.5% |
Which airline was most reliable for PDX to ORD?
Among qualifying PDX-to-ORD airline results, United Airlines had the highest on-time rate: 79.6% of 1,393 flights. American Airlines was lowest at 72.1% across 863 flights.
| Airline | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| United Airlines | 1,393 | 79.6% | 10.7% | 0.6% |
| American Airlines | 863 | 72.1% | 17.3% | 1.5% |
| Alaska Airlines | 510 | 73.3% | 9.0% | 1.4% |
Which month was most reliable for PDX to ORD?
Among qualifying PDX-to-ORD month results, February 2026 had the highest on-time rate: 89.2% of 148 flights. July 2025 was lowest at 60.9% across 297 flights.
| Month | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| July 2025 | 297 | 60.9% | 22.6% | 1.7% |
| August 2025 | 294 | 74.1% | 8.8% | 0.7% |
| September 2025 | 255 | 74.9% | 10.2% | 0.0% |
| October 2025 | 264 | 77.7% | 7.2% | 0.4% |
| November 2025 | 174 | 79.9% | 10.9% | 2.9% |
| December 2025 | 164 | 77.4% | 13.4% | 0.6% |
| January 2026 | 140 | 82.9% | 10.7% | 1.4% |
| February 2026 | 148 | 89.2% | 7.4% | 0.0% |
| March 2026 | 181 | 82.9% | 11.0% | 2.2% |
| April 2026 | 242 | 71.5% | 16.9% | 1.7% |
| May 2026 | 285 | 84.2% | 7.4% | 0.0% |
| June 2026 | 322 | 72.4% | 17.7% | 1.6% |
What drove PDX to ORD delay minutes?
Airline was the largest recorded PDX-to-ORD delay category, accounting for 37.3% of 43,955 BTS-attributed delay minutes during July 2025–June 2026.
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