Flight OddsAS521 BNA → SEA
Alaska Airlines · Nashville, TN to Seattle, WA · 45 flights observed, 2025-08-20 to 2025-10-03 · 1,978 mi
AS521 covers more than one route in the data window — the stats below are for BNA → SEA, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
56%
Median delay
+12 min
90th percentile
+66 min
Cancellation rate
0%
How often is AS521 on time?
Across 45 flights on BNA → SEA from 2025-08-20 to 2025-10-03, AS521 arrived within 15 minutes of schedule 56% of the time. The median arrival delay was +12 min, and the worst 10% of flights arrived +66 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 | 25 | 56% |
| 16-30 min | 8 | 18% |
| 31-60 min | 6 | 13% |
| 61-120 min | 5 | 11% |
| 2+ hrs | 1 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-08 | 12 | 67% | +19 min |
| 2025-09 | 30 | 50% | +19 min |
| 2025-10 | 3 | 67% | +4 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 6 | 50% |
| Tue | 6 | 67% |
| Wed | 7 | 57% |
| Thu | 7 | 29% |
| Fri | 7 | 57% |
| Sat | 6 | 100% |
| Sun | 6 | 33% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…