Flight OddsAS321 ORD → SEA
Alaska Airlines · Chicago, IL to Seattle, WA · 35 flights observed, 2026-03-18 to 2026-04-21 · 1,721 mi
AS321 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
54%
Median delay
+13 min
90th percentile
+80 min
Cancellation rate
0%
How often is AS321 on time?
Across 35 flights on ORD → SEA from 2026-03-18 to 2026-04-21, AS321 arrived within 15 minutes of schedule 54% of the time. The median arrival delay was +13 min, and the worst 10% of flights arrived +80 min or later. 0% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 19 | 54% |
| 16-30 min | 6 | 17% |
| 31-60 min | 5 | 14% |
| 61-120 min | 3 | 9% |
| 2+ hrs | 2 | 6% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-03 | 14 | 43% | +30 min |
| 2026-04 | 21 | 62% | +39 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 5 | 40% |
| Tue | 5 | 60% |
| Wed | 5 | 80% |
| Thu | 5 | 0% |
| Fri | 5 | 40% |
| Sat | 5 | 80% |
| Sun | 5 | 80% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…