Flight OddsAS660 SEA → MSO
Alaska Airlines · Seattle, WA to Missoula, MT · 145 flights observed, 2025-10-26 to 2026-06-08 · 389 mi
AS660 covers more than one route in the data window — the stats below are for SEA → MSO, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
88%
Median delay
-11 min
90th percentile
+23 min
Cancellation rate
2%
How often is AS660 on time?
Across 145 flights on SEA → MSO from 2025-10-26 to 2026-06-08, AS660 arrived within 15 minutes of schedule 88% of the time. The median arrival delay was -11 min, and the worst 10% of flights arrived +23 min or later. 2% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 124 | 88% |
| 16-30 min | 7 | 5% |
| 31-60 min | 7 | 5% |
| 61-120 min | 1 | 1% |
| 2+ hrs | 2 | 1% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-10 | 6 | 83% | -10 min |
| 2025-11 | 27 | 85% | +1 min |
| 2025-12 | 31 | 81% | +5 min |
| 2026-01 | 29 | 90% | -6 min |
| 2026-02 | 11 | 91% | -7 min |
| 2026-04 | 9 | 89% | -11 min |
| 2026-05 | 23 | 100% | -11 min |
| 2026-06 | 5 | 80% | -4 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 22 | 86% |
| Tue | 19 | 89% |
| Wed | 19 | 84% |
| Thu | 20 | 85% |
| Fri | 21 | 100% |
| Sat | 17 | 88% |
| Sun | 23 | 83% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…