DL2635
DL2635 (Delta Air Lines) is a multi-stop service on 12 routes, busiest Seattle to San Francisco. Of 485 departures recorded from November 2024 to July 2026, 72.9% left on time, according to the US BTS.
- On-time departures72.9%of 485 flights
- Average delay14.3 min
- July 202631▲ 0.0%vs July 2025
- Cancelled1.2%
- Legs flown under this number12
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods17 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 4 | 30 | ▲ 650.0% |
| February | – | 28 | – |
| March | – | 31 | – |
| April | 17 | 30 | ▲ 76.5% |
| May | 31 | 31 | 0.0% |
| June | 30 | 30 | 0.0% |
| July | 31 | 31 | 0.0% |
| August | 31 | – | – |
| September | 23 | – | – |
| October | 30 | – | in progress |
| November | 29 | – | – |
| December | 28 | – | – |
according to the US BTS · November 2024 → July 2026
On-time departures by month
Months without data are left blank.
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods17 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 50.0% | 82.8% | ▲ 65.5% |
| February | – | 78.6% | – |
| March | – | 75.9% | – |
| April | 70.6% | 93.3% | ▲ 32.2% |
| May | 83.3% | 74.2% | ▼ 11.0% |
| June | 63.3% | 63.3% | 0.0% |
| July | 77.4% | 26.7% | ▼ 65.6% |
| August | 80.7% | – | – |
| September | 91.3% | – | – |
| October | 73.3% | – | in progress |
| November | 62.1% | – | – |
| December | 70.4% | – | – |
according to the US BTS · November 2024 → July 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · November 2024 → July 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods17 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 1 | – |
| February | – | 0 | – |
| March | – | 2 | – |
| April | 0 | 0 | – |
| May | 1 | 0 | ▼ 100.0% |
| June | 0 | 0 | – |
| July | 0 | 1 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
according to the US BTS · November 2024 → July 2026
This is a historical record of departures already flown, not a forecast for your flight.
Several legs: the headline figure averages all of them. See the leg table.
Cancellation share
- Not cancelled 98.8% 479
- Cancelled 1.2% 6
Share of all recorded flights in the period, all legs. · Nov 2, 2024 → Jul 31, 2026
Legs flown under this number
1| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SEA SFO Seattle–Tacoma International Airport – San Francisco International Airport | 1,093 | 13.9 min | 73.4% | 449 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| November 2024 | 8 | 8 | 100.0% | 0 |
| December 2024 | 12 | 12 | 66.7% | 0 |
| January 2025 | 4 | 4 | 50.0% | 0 |
| April 2025 | 17 | 17 | 70.6% | 0 |
| May 2025 | 31 | 30 | 83.3% | 1 |
| June 2025 | 30 | 30 | 63.3% | 0 |
| July 2025 | 31 | 31 | 77.4% | 0 |
| August 2025 | 31 | 31 | 80.7% | 0 |
| September 2025 | 23 | 23 | 91.3% | 0 |
| October 2025 | 30 | 30 | 73.3% | 0 |
| November 2025 | 29 | 29 | 62.1% | 0 |
| December 2025 | 28 | 27 | 70.4% | 1 |
| January 2026 | 30 | 29 | 82.8% | 1 |
| February 2026 | 28 | 28 | 78.6% | 0 |
| March 2026 | 31 | 29 | 75.9% | 2 |
| April 2026 | 30 | 30 | 93.3% | 0 |
| May 2026 | 31 | 31 | 74.2% | 0 |
| June 2026 | 30 | 30 | 63.3% | 0 |
| July 2026 | 31 | 30 | 26.7% | 1 |