Flight OddsUA2356 SFO → BOS
United Airlines · San Francisco, CA to Boston, MA · 328 flights observed, 2025-07-01 to 2026-06-30 · 2,704 mi
UA2356 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
63%
Median delay
0 min
90th percentile
+98 min
Cancellation rate
1%
How often is UA2356 on time?
Across 328 flights on SFO → BOS from 2025-07-01 to 2026-06-30, UA2356 arrived within 15 minutes of schedule 63% of the time. The median arrival delay was 0 min, and the worst 10% of flights arrived +98 min or later. 1% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 202 | 63% |
| 16-30 min | 27 | 8% |
| 31-60 min | 42 | 13% |
| 61-120 min | 24 | 7% |
| 2+ hrs | 28 | 9% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 65% | +32 min |
| 2025-08 | 30 | 70% | +11 min |
| 2025-09 | 30 | 27% | +53 min |
| 2025-10 | 31 | 45% | +53 min |
| 2025-11 | 30 | 73% | +25 min |
| 2025-12 | 31 | 81% | +4 min |
| 2026-01 | 5 | 60% | +7 min |
| 2026-02 | 14 | 93% | -6 min |
| 2026-03 | 30 | 63% | +49 min |
| 2026-04 | 30 | 60% | +19 min |
| 2026-05 | 31 | 55% | +10 min |
| 2026-06 | 30 | 73% | +3 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 45 | 64% |
| Tue | 46 | 63% |
| Wed | 46 | 52% |
| Thu | 46 | 61% |
| Fri | 47 | 57% |
| Sat | 47 | 79% |
| Sun | 46 | 61% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…