DL1421
DL1421 (Delta Air Lines) is a multi-stop service on 2 routes, busiest San Francisco to Los Angeles. Of 1,240 departures recorded from October 2024 to July 2026, 93.1% left on time, according to the US BTS.
- On-time departures93.1%of 1,240 flights
- Average delay-0.4 min
- July 202662▲ 0.0%vs July 2025
- Cancelled2.1%
- Legs flown under this number2
Recorded departures by month
All legs under this number combined; see the leg table.
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 32 | 56 | ▲ 75.0% |
| February | 44 | 48 | ▲ 9.1% |
| March | 58 | 60 | ▲ 3.4% |
| April | 60 | 56 | ▼ 6.7% |
| May | 62 | 60 | ▼ 3.2% |
| June | 60 | 60 | 0.0% |
| July | 62 | 62 | 0.0% |
| August | 62 | – | – |
| September | 60 | – | – |
| October | 61 | – | in progress |
| November | 57 | – | – |
| December | 62 | – | – |
| Year to date (Jan–Jul) | 378 | 402 | ▲ 6.3% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
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 | 84.4% | 96.4% | ▲ 14.3% |
| February | 81.4% | 97.8% | ▲ 20.2% |
| March | 93.1% | 96.0% | ▲ 3.1% |
| April | 100.0% | 92.6% | ▼ 7.4% |
| May | 95.2% | 94.8% | ▼ 0.3% |
| June | 93.3% | 90.0% | ▼ 3.6% |
| July | 96.8% | 82.8% | ▼ 14.5% |
| August | 90.3% | – | – |
| September | 95.0% | – | – |
| October | 91.8% | – | in progress |
| November | 91.1% | – | – |
| December | 93.1% | – | – |
| Year-to-date average (Jan–Jul) | 92.0% | 92.9% | ▲ 1.0% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 1 | 2 | ▲ 100.0% |
| March | 0 | 10 | – |
| April | 0 | 2 | – |
| May | 0 | 2 | – |
| June | 0 | 0 | – |
| July | 0 | 4 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 4 | – | – |
| Year to date (Jan–Jul) | 1 | 20 | ▲ 1,900.0% |
according to the US BTS · October 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 97.9% 1,214
- Cancelled 2.1% 26
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
2| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SFO LAX San Francisco International Airport – Los Angeles International Airport | 543 | 0.9 min | 91.5% | 621 |
| LAX SFO Los Angeles International Airport – San Francisco International Airport | 543 | -1.7 min | 94.7% | 619 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 37 | 37 | 100.0% | 0 |
| November 2024 | 59 | 59 | 88.1% | 0 |
| December 2024 | 62 | 62 | 100.0% | 0 |
| January 2025 | 32 | 32 | 84.4% | 0 |
| February 2025 | 44 | 43 | 81.4% | 1 |
| March 2025 | 58 | 58 | 93.1% | 0 |
| April 2025 | 60 | 60 | 100.0% | 0 |
| May 2025 | 62 | 62 | 95.2% | 0 |
| June 2025 | 60 | 60 | 93.3% | 0 |
| July 2025 | 62 | 62 | 96.8% | 0 |
| August 2025 | 62 | 62 | 90.3% | 0 |
| September 2025 | 60 | 60 | 95.0% | 0 |
| October 2025 | 61 | 61 | 91.8% | 0 |
| November 2025 | 57 | 56 | 91.1% | 1 |
| December 2025 | 62 | 58 | 93.1% | 4 |
| January 2026 | 56 | 56 | 96.4% | 0 |
| February 2026 | 48 | 46 | 97.8% | 2 |
| March 2026 | 60 | 50 | 96.0% | 10 |
| April 2026 | 56 | 54 | 92.6% | 2 |
| May 2026 | 60 | 58 | 94.8% | 2 |
| June 2026 | 60 | 60 | 90.0% | 0 |
| July 2026 | 62 | 58 | 82.8% | 4 |