Flight OddsAS429 SEA → ORD
Alaska Airlines · Seattle, WA to Chicago, IL · 227 flights observed, 2025-07-01 to 2026-06-30 · 1,721 mi
AS429 covers more than one route in the data window — the stats below are for SEA → ORD, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
53%
Median delay
+14 min
90th percentile
+64 min
Cancellation rate
3%
How often is AS429 on time?
Across 227 flights on SEA → ORD from 2025-07-01 to 2026-06-30, AS429 arrived within 15 minutes of schedule 53% of the time. The median arrival delay was +14 min, and the worst 10% of flights arrived +64 min or later. 3% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 115 | 53% |
| 16-30 min | 38 | 17% |
| 31-60 min | 43 | 20% |
| 61-120 min | 14 | 6% |
| 2+ hrs | 9 | 4% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 42% | +28 min |
| 2025-08 | 30 | 27% | +32 min |
| 2025-09 | 30 | 60% | +22 min |
| 2025-10 | 31 | 55% | +32 min |
| 2025-11 | 27 | 63% | +38 min |
| 2025-12 | 28 | 50% | +14 min |
| 2026-01 | 6 | 50% | +20 min |
| 2026-04 | 8 | 63% | +2 min |
| 2026-05 | 9 | 78% | +1 min |
| 2026-06 | 19 | 68% | +5 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 31 | 42% |
| Tue | 34 | 71% |
| Wed | 32 | 50% |
| Thu | 30 | 50% |
| Fri | 32 | 56% |
| Sat | 28 | 61% |
| Sun | 32 | 38% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…