Flight profile · JetBlue
B6434
San Francisco (SFO) to Boston (BOS) · scheduled 6:00 AM – 2:50 PM
How B6434 performs
957 operations, 2023-07-01 to 2026-06-30.
B6434 arrived on time 86.1% of the time, against 78.2% for all SFO → BOS flights — this specific departure is 7.8 percentage points better than the route as a whole. Against JetBlue’s own flights on this route it is 9.0 points better.
Source: US DOT Bureau of Transportation Statistics · 957 operations between 2023-07-01 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| B6434 | 86.1% | 0.73% | -11 min | 4.2% | 957 |
| JetBlue on SFO → BOS | 77.0% | 0.85% | -7 min | 9.2% | 4,841 |
| All SFO → BOS flights | 78.2% | 0.95% | -7 min | 8.3% | 13,718 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30
By day of week
Does B6434 run worse on particular days?
Wednesday is historically the most reliable day and Friday the least, a gap of 5.4 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30 · Days with fewer than 120 operations are not scored.
Data and methodology
Calculated by FlyerIntel from 957 records of B6434 operating SFO → BOS, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.