AS599
AS599 (Alaska Airlines) is a multi-stop service on 8 routes, busiest Las Vegas to Seattle. Of 283 departures recorded from March 2025 to July 2026, 73.4% left on time, according to the US BTS.
- On-time departures73.4%of 283 flights
- Average delay11.7 min
- July 202623▼ 25.8%vs July 2025
- Cancelled0.4%
- Legs flown under this number8
Recorded departures by month
All legs under this number combined; see the leg table.
The most recent periods17 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | – | 2 | – |
| February | – | 17 | – |
| March | 1 | 30 | ▲ 2,900.0% |
| April | 9 | 30 | ▲ 233.3% |
| May | 14 | 30 | ▲ 114.3% |
| June | 19 | 24 | ▲ 26.3% |
| July | 31 | 23 | ▼ 25.8% |
| August | 28 | – | – |
| September | 21 | – | – |
| October | 2 | – | in progress |
| November | 1 | – | – |
| December | 1 | – | – |
according to the US BTS · March 2025 → 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 periods17 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | – | 100.0% | – |
| February | – | 70.6% | – |
| March | 0.0% | 79.3% | – |
| April | 44.4% | 96.7% | ▲ 117.5% |
| May | 42.9% | 76.7% | ▲ 78.9% |
| June | 94.7% | 79.2% | ▼ 16.4% |
| July | 74.2% | 60.9% | ▼ 18.0% |
| August | 67.9% | – | – |
| September | 57.1% | – | – |
| October | 50.0% | – | in progress |
| November | 100.0% | – | – |
| December | 100.0% | – | – |
according to the US BTS · March 2025 → July 2026
Average departure delay by month
according to the US BTS · March 2025 → July 2026
Cancelled departures by month
The most recent periods17 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | – | 0 | – |
| February | – | 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 | 0 | – | – |
according to the US BTS · March 2025 → 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 99.6% 282
- Cancelled 0.4% 1
Share of all recorded flights in the period, all legs. · Mar 19, 2025 → 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 |
|---|---|---|---|---|
| LAS SEA Harry Reid International Airport – Seattle–Tacoma International Airport | 1,395 | 15.3 min | 68.4% | 178 |
| RNO SEA Reno Tahoe International Airport – Seattle–Tacoma International Airport | 907 | 10.5 min | 65.8% | 38 |
| SEA LAX Seattle–Tacoma International Airport – Los Angeles International Airport | 1,537 | -0.1 min | 94.3% | 35 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| March 2025 | 1 | 1 | 0.0% | 0 |
| April 2025 | 9 | 9 | 44.4% | 0 |
| May 2025 | 14 | 14 | 42.9% | 0 |
| June 2025 | 19 | 19 | 94.7% | 0 |
| July 2025 | 31 | 31 | 74.2% | 0 |
| August 2025 | 28 | 28 | 67.9% | 0 |
| September 2025 | 21 | 21 | 57.1% | 0 |
| October 2025 | 2 | 2 | 50.0% | 0 |
| November 2025 | 1 | 1 | 100.0% | 0 |
| December 2025 | 1 | 1 | 100.0% | 0 |
| January 2026 | 2 | 2 | 100.0% | 0 |
| February 2026 | 17 | 17 | 70.6% | 0 |
| March 2026 | 30 | 29 | 79.3% | 1 |
| April 2026 | 30 | 30 | 96.7% | 0 |
| May 2026 | 30 | 30 | 76.7% | 0 |
| June 2026 | 24 | 24 | 79.2% | 0 |
| July 2026 | 23 | 23 | 60.9% | 0 |