Which departure time was most reliable for SEA to ORD?
Among qualifying SEA-to-ORD departure window results, Early morning had the highest on-time rate: 83.5% of 1,432 flights. Afternoon was lowest at 62.5% across 1,227 flights.
| Departure window | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Early morning | 1,432 | 83.5% | 9.1% | 0.9% |
| Late morning | 1,185 | 67.3% | 19.1% | 1.3% |
| Afternoon | 1,227 | 62.5% | 23.2% | 1.1% |
| Evening | 808 | 75.4% | 16.1% | 1.0% |
| Night | 914 | 78.0% | 13.7% | 2.4% |
Which weekday was most reliable for SEA to ORD?
Among qualifying SEA-to-ORD weekday results, Tuesday had the highest on-time rate: 81.6% of 809 flights. Sunday was lowest at 67.2% across 812 flights.
| Day | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Monday | 825 | 69.8% | 19.2% | 1.9% |
| Tuesday | 809 | 81.6% | 11.2% | 0.4% |
| Wednesday | 780 | 76.5% | 14.5% | 1.4% |
| Thursday | 816 | 72.2% | 16.5% | 1.3% |
| Friday | 814 | 71.0% | 17.4% | 1.1% |
| Saturday | 710 | 75.6% | 14.2% | 1.0% |
| Sunday | 812 | 67.2% | 19.2% | 1.7% |
Which airline was most reliable for SEA to ORD?
Among qualifying SEA-to-ORD airline results, United Airlines had the highest on-time rate: 78.6% of 1,534 flights. American Airlines was lowest at 69.0% across 1,336 flights.
| Airline | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Alaska Airlines | 1,794 | 71.0% | 16.5% | 1.1% |
| United Airlines | 1,534 | 78.6% | 13.6% | 0.9% |
| American Airlines | 1,336 | 69.0% | 19.5% | 2.0% |
| Delta Air Lines | 902 | 75.5% | 14.5% | 1.2% |
Which month was most reliable for SEA to ORD?
Among qualifying SEA-to-ORD month results, February 2026 had the highest on-time rate: 91.3% of 300 flights. August 2025 was lowest at 58.9% across 599 flights.
| Month | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| July 2025 | 623 | 63.6% | 21.3% | 1.3% |
| August 2025 | 599 | 58.9% | 24.5% | 1.7% |
| September 2025 | 509 | 79.6% | 8.4% | 0.0% |
| October 2025 | 496 | 80.2% | 11.3% | 0.6% |
| November 2025 | 390 | 71.3% | 20.0% | 3.3% |
| December 2025 | 382 | 68.8% | 20.2% | 1.8% |
| January 2026 | 301 | 72.1% | 19.6% | 1.0% |
| February 2026 | 300 | 91.3% | 3.7% | 0.7% |
| March 2026 | 357 | 76.5% | 15.7% | 2.8% |
| April 2026 | 465 | 77.8% | 13.3% | 1.1% |
| May 2026 | 562 | 80.6% | 10.9% | 0.0% |
| June 2026 | 582 | 70.6% | 19.4% | 1.7% |
What drove SEA to ORD delay minutes?
Airline was the largest recorded SEA-to-ORD delay category, accounting for 34.0% of 100,152 BTS-attributed delay minutes during July 2025–June 2026.
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