AS604
AS604 (Alaska Airlines) is a multi-stop service on 4 routes, busiest Seattle to Phoenix. Of 429 departures recorded from November 2024 to July 2026, 87.1% left on time, according to the US BTS.
- On-time departures87.1%of 429 flights
- Average delay3.2 min
- July 202631▲ 675.0%vs July 2025
- Cancelled0.7%
- Legs flown under this number4
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 | 12 | 6 | ▼ 50.0% |
| February | 20 | 17 | ▼ 15.0% |
| March | 27 | 31 | ▲ 14.8% |
| April | 23 | 30 | ▲ 30.4% |
| May | 29 | 31 | ▲ 6.9% |
| June | 15 | 29 | ▲ 93.3% |
| July | 4 | 31 | ▲ 675.0% |
| August | 11 | – | – |
| September | 22 | – | – |
| October | 30 | – | in progress |
| November | 29 | – | – |
| December | 29 | – | – |
| Year to date (Jan–Jul) | 130 | 175 | ▲ 34.6% |
according to the US BTS · November 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 | 100.0% | 80.0% | ▼ 20.0% |
| February | 100.0% | 94.1% | ▼ 5.9% |
| March | 96.3% | 83.3% | ▼ 13.5% |
| April | 100.0% | 93.3% | ▼ 6.7% |
| May | 86.2% | 77.4% | ▼ 10.2% |
| June | 80.0% | 72.4% | ▼ 9.5% |
| July | 100.0% | 64.5% | ▼ 35.5% |
| August | 90.9% | – | – |
| September | 86.4% | – | – |
| October | 90.0% | – | in progress |
| November | 89.7% | – | – |
| December | 92.9% | – | – |
| Year-to-date average (Jan–Jul) | 94.6% | 80.7% | ▼ 14.7% |
according to the US BTS · November 2024 → July 2026
Average departure delay by month
according to the US BTS · November 2024 → July 2026
Cancelled departures by month
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 1 | – |
| February | 0 | 0 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 0 | 2 |
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 99.3% 426
- Cancelled 0.7% 3
Share of all recorded flights in the period, all legs. · Nov 22, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
3| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SEA PHX Seattle–Tacoma International Airport – Phoenix Sky Harbor International Airport | 1,782 | 1.6 min | 91.0% | 314 |
| PIT SEA Pittsburgh International Airport – Seattle–Tacoma International Airport | 3,411 | 4.0 min | 85.3% | 61 |
| SEA AUS Seattle–Tacoma International Airport – Austin Bergstrom International Airport | 2,848 | 12.1 min | 64.7% | 51 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| November 2024 | 2 | 2 | 100.0% | 0 |
| December 2024 | 1 | 1 | 100.0% | 0 |
| January 2025 | 12 | 12 | 100.0% | 0 |
| February 2025 | 20 | 20 | 100.0% | 0 |
| March 2025 | 27 | 27 | 96.3% | 0 |
| April 2025 | 23 | 23 | 100.0% | 0 |
| May 2025 | 29 | 29 | 86.2% | 0 |
| June 2025 | 15 | 15 | 80.0% | 0 |
| July 2025 | 4 | 4 | 100.0% | 0 |
| August 2025 | 11 | 11 | 90.9% | 0 |
| September 2025 | 22 | 22 | 86.4% | 0 |
| October 2025 | 30 | 30 | 90.0% | 0 |
| November 2025 | 29 | 29 | 89.7% | 0 |
| December 2025 | 29 | 28 | 92.9% | 1 |
| January 2026 | 6 | 5 | 80.0% | 1 |
| February 2026 | 17 | 17 | 94.1% | 0 |
| March 2026 | 31 | 30 | 83.3% | 1 |
| April 2026 | 30 | 30 | 93.3% | 0 |
| May 2026 | 31 | 31 | 77.4% | 0 |
| June 2026 | 29 | 29 | 72.4% | 0 |
| July 2026 | 31 | 31 | 64.5% | 0 |