Flight OddsAS329 ORD → SEA
Alaska Airlines · Chicago, IL to Seattle, WA · 270 flights observed, 2025-07-01 to 2026-06-30 · 1,721 mi
AS329 covers more than one route in the data window — the stats below are for ORD → SEA, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
70%
Median delay
+1 min
90th percentile
+53 min
Cancellation rate
1%
How often is AS329 on time?
Across 270 flights on ORD → SEA from 2025-07-01 to 2026-06-30, AS329 arrived within 15 minutes of schedule 70% of the time. The median arrival delay was +1 min, and the worst 10% of flights arrived +53 min or later. 1% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 187 | 70% |
| 16-30 min | 28 | 10% |
| 31-60 min | 30 | 11% |
| 61-120 min | 14 | 5% |
| 2+ hrs | 8 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 74% | +22 min |
| 2025-08 | 31 | 84% | +6 min |
| 2025-09 | 30 | 87% | -2 min |
| 2025-10 | 30 | 63% | +16 min |
| 2025-11 | 28 | 54% | +34 min |
| 2025-12 | 29 | 59% | +23 min |
| 2026-01 | 6 | 100% | -15 min |
| 2026-02 | 8 | 75% | +2 min |
| 2026-03 | 7 | 57% | +26 min |
| 2026-04 | 8 | 75% | +0 min |
| 2026-05 | 30 | 77% | +4 min |
| 2026-06 | 29 | 55% | +32 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 41 | 68% |
| Tue | 38 | 66% |
| Wed | 35 | 71% |
| Thu | 42 | 69% |
| Fri | 41 | 73% |
| Sat | 37 | 68% |
| Sun | 33 | 76% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…