AS304
AS304 (Alaska Airlines) is a multi-stop service on 9 routes, busiest Seattle to Detroit. Of 662 departures recorded from October 2024 to July 2026, 83.2% left on time, according to the US BTS.
- On-time departures83.2%of 662 flights
- Average delay5.9 min
- July 202631▲ 0.0%vs July 2025
- Cancelled0.0%
- Legs flown under this number9
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 | 48 | 6 | ▼ 87.5% |
| February | 48 | 17 | ▼ 64.6% |
| March | 62 | 30 | ▼ 51.6% |
| April | 42 | 30 | ▼ 28.6% |
| May | 34 | 12 | ▼ 64.7% |
| June | 41 | 21 | ▼ 48.8% |
| July | 31 | 31 | 0.0% |
| August | 19 | – | – |
| September | – | – | – |
| October | 2 | – | in progress |
| November | 8 | – | – |
| December | 25 | – | – |
| Year to date (Jan–Jul) | 306 | 147 | ▼ 52.0% |
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 | 95.8% | 83.3% | ▼ 13.0% |
| February | 85.4% | 76.5% | ▼ 10.5% |
| March | 93.6% | 80.0% | ▼ 14.5% |
| April | 88.1% | 93.3% | ▲ 5.9% |
| May | 91.2% | 91.7% | ▲ 0.5% |
| June | 75.6% | 66.7% | ▼ 11.8% |
| July | 83.9% | 48.4% | ▼ 42.3% |
| August | 73.7% | – | – |
| September | – | – | – |
| October | 50.0% | – | in progress |
| November | 100.0% | – | – |
| December | 92.0% | – | – |
| Year-to-date average (Jan–Jul) | 87.7% | 77.1% | ▼ 12.0% |
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 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | – | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 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 100.0% 662
- Cancelled 0.0% 0
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
4| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SEA DTW Seattle–Tacoma International Airport – Detroit Metropolitan Wayne County Airport | 3,093 | 3.2 min | 87.4% | 206 |
| DTW SEA Detroit Metropolitan Wayne County Airport – Seattle–Tacoma International Airport | 3,093 | 3.5 min | 86.3% | 205 |
| BOS SEA Boston Logan International Airport – Seattle–Tacoma International Airport | 4,006 | 15.6 min | 66.9% | 121 |
| SEA MCO Seattle–Tacoma International Airport – Orlando International Airport | 4,105 | 9.9 min | 82.9% | 70 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 40 | 40 | 85.0% | 0 |
| November 2024 | 57 | 57 | 75.4% | 0 |
| December 2024 | 58 | 58 | 82.8% | 0 |
| January 2025 | 48 | 48 | 95.8% | 0 |
| February 2025 | 48 | 48 | 85.4% | 0 |
| March 2025 | 62 | 62 | 93.6% | 0 |
| April 2025 | 42 | 42 | 88.1% | 0 |
| May 2025 | 34 | 34 | 91.2% | 0 |
| June 2025 | 41 | 41 | 75.6% | 0 |
| July 2025 | 31 | 31 | 83.9% | 0 |
| August 2025 | 19 | 19 | 73.7% | 0 |
| October 2025 | 2 | 2 | 50.0% | 0 |
| November 2025 | 8 | 8 | 100.0% | 0 |
| December 2025 | 25 | 25 | 92.0% | 0 |
| January 2026 | 6 | 6 | 83.3% | 0 |
| February 2026 | 17 | 17 | 76.5% | 0 |
| March 2026 | 30 | 30 | 80.0% | 0 |
| April 2026 | 30 | 30 | 93.3% | 0 |
| May 2026 | 12 | 12 | 91.7% | 0 |
| June 2026 | 21 | 21 | 66.7% | 0 |
| July 2026 | 31 | 31 | 48.4% | 0 |