Flight OddsAS518 SEA → MSO
Alaska Airlines · Seattle, WA to Missoula, MT · 30 flights observed, 2026-03-18 to 2026-04-21 · 389 mi
AS518 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
87%
Median delay
-7 min
90th percentile
+21 min
Cancellation rate
0%
How often is AS518 on time?
Across 30 flights on SEA → MSO from 2026-03-18 to 2026-04-21, AS518 arrived within 15 minutes of schedule 87% of the time. The median arrival delay was -7 min, and the worst 10% of flights arrived +21 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 | 26 | 87% |
| 16-30 min | 2 | 7% |
| 31-60 min | 2 | 7% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-03 | 12 | 75% | +1 min |
| 2026-04 | 18 | 94% | -7 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 5 | 80% |
| Tue | 5 | 100% |
| Wed | 5 | 80% |
| Thu | 5 | 100% |
| Fri | 5 | 80% |
| Sat | No data | — |
| 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…