B6434
B6434 (JetBlue Airways) flies San Francisco to Boston. Of 609 departures recorded from October 2024 to July 2026, 90.8% left on time, according to the US BTS.
according to the US BTS · Oct 12, 2024 → Jul 31, 2026 domestic flights only
Recorded departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 31 | 26 | ▼ 16.1% |
| February | 26 | 24 | ▼ 7.7% |
| March | 31 | 27 | ▼ 12.9% |
| April | 30 | 26 | ▼ 13.3% |
| May | 31 | 28 | ▼ 9.7% |
| June | 30 | 30 | 0.0% |
| July | 31 | 31 | 0.0% |
| August | 23 | – | – |
| September | 26 | – | – |
| October | 27 | – | in progress |
| November | 24 | – | – |
| December | 27 | – | – |
| Year to date (Jan–Jul) | 210 | 192 | ▼ 8.6% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods19 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 96.8% | 91.7% | ▼ 5.3% |
| February | 84.0% | 100.0% | ▲ 19.0% |
| March | 87.1% | 92.6% | ▲ 6.3% |
| April | 93.3% | 80.8% | ▼ 13.5% |
| May | 93.6% | 92.9% | ▼ 0.7% |
| June | 90.0% | 93.3% | ▲ 3.7% |
| July | 96.8% | 100.0% | ▲ 3.3% |
| August | 95.7% | – | – |
| September | 92.3% | – | – |
| October | 81.5% | – | in progress |
| November | 79.2% | – | – |
| December | 74.1% | – | – |
| Year-to-date average (Jan–Jul) | 91.6% | 93.0% | ▲ 1.5% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Partial coverage: domestic flights only · 22 of 22 periods have data
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 2 | – |
| February | 1 | 2 | ▲ 100.0% |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 4 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 8 | ▲ 700.0% |
according to the US BTS · October 2024 → July 2026
This is not a forecast
This is a historical record of departures already flown, not a forecast for your flight.
Cancellation share
- Not cancelled 98.5% 600
- Cancelled 1.5% 9
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 31, 2026
Legs flown under this number
1| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SFO BOS San Francisco International Airport – Boston Logan International Airport | 4,341 | 3.0 min | 90.8% | 609 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 95.0% | 0 |
| November 2024 | 30 | 30 | 93.3% | 0 |
| December 2024 | 30 | 30 | 93.3% | 0 |
| January 2025 | 31 | 31 | 96.8% | 0 |
| February 2025 | 26 | 25 | 84.0% | 1 |
| March 2025 | 31 | 31 | 87.1% | 0 |
| April 2025 | 30 | 30 | 93.3% | 0 |
| May 2025 | 31 | 31 | 93.6% | 0 |
| June 2025 | 30 | 30 | 90.0% | 0 |
| July 2025 | 31 | 31 | 96.8% | 0 |
| August 2025 | 23 | 23 | 95.7% | 0 |
| September 2025 | 26 | 26 | 92.3% | 0 |
| October 2025 | 27 | 27 | 81.5% | 0 |
| November 2025 | 24 | 24 | 79.2% | 0 |
| December 2025 | 27 | 27 | 74.1% | 0 |
| January 2026 | 26 | 24 | 91.7% | 2 |
| February 2026 | 24 | 22 | 100.0% | 2 |
| March 2026 | 27 | 27 | 92.6% | 0 |
| April 2026 | 26 | 26 | 80.8% | 0 |
| May 2026 | 28 | 28 | 92.9% | 0 |
| June 2026 | 30 | 30 | 93.3% | 0 |
| July 2026 | 31 | 27 | 100.0% | 4 |