Flight OddsAS356 SFO → BOS
Alaska Airlines · San Francisco, CA to Boston, MA · 71 flights observed, 2025-07-01 to 2026-01-06 · 2,704 mi
AS356 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
87%
Median delay
-14 min
90th percentile
+16 min
Cancellation rate
0%
How often is AS356 on time?
Across 71 flights on SFO → BOS from 2025-07-01 to 2026-01-06, AS356 arrived within 15 minutes of schedule 87% of the time. The median arrival delay was -14 min, and the worst 10% of flights arrived +16 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 | 62 | 87% |
| 16-30 min | 7 | 10% |
| 31-60 min | 1 | 1% |
| 61-120 min | 1 | 1% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 3 | 100% | -7 min |
| 2025-10 | 5 | 80% | +6 min |
| 2025-11 | 26 | 92% | -14 min |
| 2025-12 | 31 | 90% | -14 min |
| 2026-01 | 6 | 50% | +10 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 11 | 91% |
| Tue | 12 | 92% |
| Wed | 10 | 100% |
| Thu | 10 | 70% |
| Fri | 9 | 78% |
| Sat | 8 | 100% |
| Sun | 11 | 82% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…