Flight OddsAS520 SEA → SAT
Alaska Airlines · Seattle, WA to San Antonio, TX · 76 flights observed, 2025-11-21 to 2026-06-30 · 1,774 mi
AS520 covers more than one route in the data window — the stats below are for SEA → SAT, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
78%
Median delay
-4 min
90th percentile
+34 min
Cancellation rate
0%
How often is AS520 on time?
Across 76 flights on SEA → SAT from 2025-11-21 to 2026-06-30, AS520 arrived within 15 minutes of schedule 78% of the time. The median arrival delay was -4 min, and the worst 10% of flights arrived +34 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 | 59 | 78% |
| 16-30 min | 8 | 11% |
| 31-60 min | 7 | 9% |
| 61-120 min | 1 | 1% |
| 2+ hrs | 1 | 1% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-11 | 9 | 67% | +2 min |
| 2025-12 | 13 | 62% | +18 min |
| 2026-01 | 5 | 80% | +2 min |
| 2026-05 | 19 | 100% | -5 min |
| 2026-06 | 30 | 73% | +6 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 12 | 83% |
| Tue | 10 | 80% |
| Wed | 8 | 88% |
| Thu | 10 | 70% |
| Fri | 12 | 75% |
| Sat | 12 | 75% |
| Sun | 12 | 75% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…