Flight OddsAS621 SEA → SAN
Alaska Airlines · Seattle, WA to San Diego, CA · 173 flights observed, 2025-10-26 to 2026-06-09 · 1,050 mi
AS621 covers more than one route in the data window — the stats below are for SEA → SAN, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
82%
Median delay
-4 min
90th percentile
+34 min
Cancellation rate
1%
How often is AS621 on time?
Across 173 flights on SEA → SAN from 2025-10-26 to 2026-06-09, AS621 arrived within 15 minutes of schedule 82% of the time. The median arrival delay was -4 min, and the worst 10% of flights arrived +34 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 | 141 | 82% |
| 16-30 min | 11 | 6% |
| 31-60 min | 13 | 8% |
| 61-120 min | 5 | 3% |
| 2+ hrs | 1 | 1% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-10 | 6 | 67% | +7 min |
| 2025-11 | 30 | 83% | -2 min |
| 2025-12 | 28 | 64% | +22 min |
| 2026-01 | 25 | 88% | -4 min |
| 2026-02 | 21 | 90% | -1 min |
| 2026-03 | 12 | 75% | -1 min |
| 2026-04 | 9 | 78% | +3 min |
| 2026-05 | 31 | 90% | -7 min |
| 2026-06 | 9 | 100% | -11 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 28 | 71% |
| Tue | 28 | 93% |
| Wed | 27 | 85% |
| Thu | 26 | 85% |
| Fri | 16 | 81% |
| Sat | 19 | 95% |
| Sun | 27 | 70% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…