Flight OddsAS143 ANC → SEA
Alaska Airlines · Anchorage, AK to Seattle, WA · 214 flights observed, 2025-07-03 to 2026-03-17 · 1,448 mi
AS143 covers more than one route in the data window — the stats below are for ANC → SEA, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
71%
Median delay
-3 min
90th percentile
+44 min
Cancellation rate
1%
How often is AS143 on time?
Across 214 flights on ANC → SEA from 2025-07-03 to 2026-03-17, AS143 arrived within 15 minutes of schedule 71% of the time. The median arrival delay was -3 min, and the worst 10% of flights arrived +44 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 | 150 | 71% |
| 16-30 min | 19 | 9% |
| 31-60 min | 24 | 11% |
| 61-120 min | 12 | 6% |
| 2+ hrs | 6 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 20 | 45% | +30 min |
| 2025-08 | 24 | 54% | +21 min |
| 2025-09 | 26 | 65% | +24 min |
| 2025-10 | 29 | 69% | +14 min |
| 2025-11 | 22 | 82% | -6 min |
| 2025-12 | 27 | 67% | +2 min |
| 2026-01 | 25 | 80% | +4 min |
| 2026-02 | 24 | 96% | -8 min |
| 2026-03 | 14 | 86% | -2 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 37 | 68% |
| Tue | 30 | 77% |
| Wed | 29 | 79% |
| Thu | 36 | 64% |
| Fri | 21 | 76% |
| Sat | 22 | 59% |
| Sun | 36 | 75% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…