Flight OddsAS509 SEA → SLC
Alaska Airlines · Seattle, WA to Salt Lake City, UT · 49 flights observed, 2025-07-01 to 2025-08-19 · 689 mi
AS509 covers more than one route in the data window — the stats below are for SEA → SLC, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
78%
Median delay
+1 min
90th percentile
+23 min
Cancellation rate
8%
How often is AS509 on time?
Across 49 flights on SEA → SLC from 2025-07-01 to 2025-08-19, AS509 arrived within 15 minutes of schedule 78% of the time. The median arrival delay was +1 min, and the worst 10% of flights arrived +23 min or later. 8% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 35 | 78% |
| 16-30 min | 7 | 16% |
| 31-60 min | 1 | 2% |
| 61-120 min | 1 | 2% |
| 2+ hrs | 1 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 28 | 82% | +7 min |
| 2025-08 | 17 | 71% | +7 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 6 | 83% |
| Tue | 8 | 75% |
| Wed | 7 | 86% |
| Thu | 5 | 80% |
| Fri | 7 | 86% |
| Sat | 6 | 50% |
| Sun | 6 | 83% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…