Flight OddsAS425 SFO → BOS
Alaska Airlines · San Francisco, CA to Boston, MA · 45 flights observed, 2025-08-20 to 2025-10-03 · 2,704 mi
AS425 covers more than one route in the data window — the stats below are for SFO → BOS, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
89%
Median delay
-10 min
90th percentile
+22 min
Cancellation rate
0%
How often is AS425 on time?
Across 45 flights on SFO → BOS from 2025-08-20 to 2025-10-03, AS425 arrived within 15 minutes of schedule 89% of the time. The median arrival delay was -10 min, and the worst 10% of flights arrived +22 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 | 40 | 89% |
| 16-30 min | 1 | 2% |
| 31-60 min | 0 | 0% |
| 61-120 min | 1 | 2% |
| 2+ hrs | 3 | 7% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-08 | 12 | 100% | -15 min |
| 2025-09 | 30 | 83% | +9 min |
| 2025-10 | 3 | 100% | -8 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 6 | 100% |
| Tue | 6 | 100% |
| Wed | 7 | 86% |
| Thu | 7 | 71% |
| Fri | 7 | 86% |
| Sat | 6 | 83% |
| Sun | 6 | 100% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…