Flight OddsUnited Airlines · Boston, MA to San Francisco, CA · 321 flights observed, 2025-07-01 to 2026-06-30 · 2,704 mi
UA2400 covers more than one route in the data window — the stats below are for BOS → SFO, the one it has flown most recently. The others are linked under “Other routes”.
How often is UA2400 on time?
Across 321 flights on BOS → SFO from 2025-07-01 to 2026-06-30, UA2400 arrived within 15 minutes of schedule 59% of the time. The median arrival delay was +8 min, and the worst 10% of flights arrived +100 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 | 187 | 59% |
| 16-30 min | 36 | 11% |
| 31-60 min | 31 | 10% |
| 61-120 min | 38 | 12% |
| 2+ hrs | 25 | 8% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 30 | 53% | +26 min |
| 2025-08 | 31 | 87% | +6 min |
| 2025-09 | 30 | 57% | +38 min |
| 2025-10 | 30 | 50% | +36 min |
| 2025-11 | 30 | 63% | +29 min |
| 2025-12 | 27 | 74% | +21 min |
| 2026-01 | 4 | 25% | +117 min |
| 2026-02 | 15 | 73% | +8 min |
| 2026-03 | 31 | 68% | +12 min |
| 2026-04 | 30 | 63% | +28 min |
| 2026-05 | 31 | 45% | +32 min |
| 2026-06 | 28 | 25% | +40 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 46 | 52% |
| Tue | 46 | 65% |
| Wed | 44 | 61% |
| Thu | 45 | 44% |
| Fri | 44 | 52% |
| Sat | 46 | 76% |
| 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…