Flight OddsAS538 SEA → ORD
Alaska Airlines · Seattle, WA to Chicago, IL · 350 flights observed, 2025-07-01 to 2026-06-30 · 1,721 mi
On-time arrival
79%
Median delay
-7 min
90th percentile
+47 min
Cancellation rate
1%
How often is AS538 on time?
Across 350 flights on SEA → ORD from 2025-07-01 to 2026-06-30, AS538 arrived within 15 minutes of schedule 79% of the time. The median arrival delay was -7 min, and the worst 10% of flights arrived +47 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 | 270 | 79% |
| 16-30 min | 25 | 7% |
| 31-60 min | 24 | 7% |
| 61-120 min | 15 | 4% |
| 2+ hrs | 9 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 30 | 57% | +23 min |
| 2025-08 | 30 | 43% | +34 min |
| 2025-09 | 30 | 77% | +7 min |
| 2025-10 | 27 | 93% | -9 min |
| 2025-11 | 26 | 81% | +0 min |
| 2025-12 | 22 | 77% | -2 min |
| 2026-01 | 31 | 81% | +10 min |
| 2026-02 | 28 | 100% | -13 min |
| 2026-03 | 29 | 83% | -5 min |
| 2026-04 | 29 | 83% | -5 min |
| 2026-05 | 31 | 97% | -17 min |
| 2026-06 | 30 | 77% | +17 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 50 | 74% |
| Tue | 48 | 88% |
| Wed | 49 | 84% |
| Thu | 48 | 71% |
| Fri | 49 | 78% |
| Sat | 48 | 83% |
| Sun | 51 | 75% |
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…