Flight OddsAS21 JFK → SEA
Alaska Airlines · New York, NY to Seattle, WA · 358 flights observed, 2025-07-01 to 2026-06-30 · 2,422 mi
On-time arrival
68%
Median delay
+2 min
90th percentile
+41 min
Cancellation rate
3%
How often is AS21 on time?
Across 358 flights on JFK → SEA from 2025-07-01 to 2026-06-30, AS21 arrived within 15 minutes of schedule 68% of the time. The median arrival delay was +2 min, and the worst 10% of flights arrived +41 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 | 236 | 68% |
| 16-30 min | 55 | 16% |
| 31-60 min | 30 | 9% |
| 61-120 min | 17 | 5% |
| 2+ hrs | 7 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 30 | 77% | +1 min |
| 2025-08 | 30 | 53% | +15 min |
| 2025-09 | 29 | 93% | -6 min |
| 2025-10 | 29 | 83% | -1 min |
| 2025-11 | 29 | 79% | +3 min |
| 2025-12 | 29 | 24% | +36 min |
| 2026-01 | 26 | 50% | +33 min |
| 2026-02 | 23 | 74% | -3 min |
| 2026-03 | 31 | 39% | +23 min |
| 2026-04 | 29 | 97% | -10 min |
| 2026-05 | 31 | 77% | +7 min |
| 2026-06 | 29 | 76% | +6 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 50 | 68% |
| Tue | 50 | 78% |
| Wed | 50 | 68% |
| Thu | 49 | 67% |
| Fri | 51 | 65% |
| Sat | 45 | 62% |
| Sun | 50 | 70% |
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…