DL474
DL474 (Delta Air Lines) is a multi-stop service on 6 routes, busiest Seattle to Boston. Of 432 departures recorded from October 2024 to July 2026, 72.0% left on time, according to the US BTS.
- On-time departures72.0%of 432 flights
- Average delay24.3 min
- July 202627▼ 6.9%vs July 2025
- Cancelled1.6%
- Legs flown under this number6
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods18 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 15 | 5 | ▼ 66.7% |
| February | 16 | – | – |
| March | 21 | 21 | 0.0% |
| April | 21 | 26 | ▲ 23.8% |
| May | 24 | 25 | ▲ 4.2% |
| June | 26 | 27 | ▲ 3.8% |
| July | 29 | 27 | ▼ 6.9% |
| August | 25 | – | – |
| September | 17 | – | – |
| October | 25 | – | in progress |
| November | 24 | – | – |
| December | 24 | – | – |
according to the US BTS · October 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 periods18 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 80.0% | 80.0% | 0.0% |
| February | 93.8% | – | – |
| March | 75.0% | 33.3% | ▼ 55.6% |
| April | 71.4% | 73.1% | ▲ 2.3% |
| May | 58.3% | 88.0% | ▲ 50.9% |
| June | 88.5% | 57.7% | ▼ 34.8% |
| July | 69.0% | 68.0% | ▼ 1.4% |
| August | 76.0% | – | – |
| September | 70.6% | – | – |
| October | 76.0% | – | in progress |
| November | 62.5% | – | – |
| December | 81.0% | – | – |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods18 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | – | – |
| March | 1 | 0 | ▼ 100.0% |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 1 | – |
| July | 0 | 2 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 3 | – | – |
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 98.4% 425
- Cancelled 1.6% 7
Share of all recorded flights in the period, all legs. · Oct 13, 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 |
|---|---|---|---|---|
| SEA BOS Seattle–Tacoma International Airport – Boston Logan International Airport | 4,006 | 25.3 min | 70.2% | 374 |
| MCI LAX Kansas City International Airport – Los Angeles International Airport | 2,190 | -0.4 min | 88.6% | 35 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 12 | 12 | 66.7% | 0 |
| November 2024 | 12 | 12 | 83.3% | 0 |
| December 2024 | 10 | 10 | 80.0% | 0 |
| January 2025 | 15 | 15 | 80.0% | 0 |
| February 2025 | 16 | 16 | 93.8% | 0 |
| March 2025 | 21 | 20 | 75.0% | 1 |
| April 2025 | 21 | 21 | 71.4% | 0 |
| May 2025 | 24 | 24 | 58.3% | 0 |
| June 2025 | 26 | 26 | 88.5% | 0 |
| July 2025 | 29 | 29 | 69.0% | 0 |
| August 2025 | 25 | 25 | 76.0% | 0 |
| September 2025 | 17 | 17 | 70.6% | 0 |
| October 2025 | 25 | 25 | 76.0% | 0 |
| November 2025 | 24 | 24 | 62.5% | 0 |
| December 2025 | 24 | 21 | 81.0% | 3 |
| January 2026 | 5 | 5 | 80.0% | 0 |
| March 2026 | 21 | 21 | 33.3% | 0 |
| April 2026 | 26 | 26 | 73.1% | 0 |
| May 2026 | 25 | 25 | 88.0% | 0 |
| June 2026 | 27 | 26 | 57.7% | 1 |
| July 2026 | 27 | 25 | 68.0% | 2 |