AS634
AS634 (Alaska Airlines) is a multi-stop service on 3 routes, busiest Las Vegas to San Francisco. Of 460 departures recorded from October 2024 to July 2026, 67.8% left on time, according to the US BTS.
- On-time departures67.8%of 460 flights
- Average delay14.5 min
- July 202631▲ 0.0%vs July 2025
- Cancelled0.2%
- Legs flown under this number3
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods17 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | – | 30 | – |
| February | – | 37 | – |
| March | 11 | 44 | ▲ 300.0% |
| April | 27 | 26 | ▼ 3.7% |
| May | 14 | 26 | ▲ 85.7% |
| June | 19 | 30 | ▲ 57.9% |
| July | 31 | 31 | 0.0% |
| August | 29 | – | – |
| September | 26 | – | – |
| October | 8 | – | in progress |
| November | 26 | – | – |
| December | 30 | – | – |
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 periods17 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | – | 83.3% | – |
| February | – | 78.4% | – |
| March | 81.8% | 86.4% | ▲ 5.5% |
| April | 74.1% | 65.4% | ▼ 11.7% |
| May | 71.4% | 42.3% | ▼ 40.8% |
| June | 63.2% | 40.0% | ▼ 36.7% |
| July | 63.3% | 48.4% | ▼ 23.6% |
| August | 65.5% | – | – |
| September | 76.9% | – | – |
| October | 75.0% | – | in progress |
| November | 69.2% | – | – |
| December | 63.3% | – | – |
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 periods17 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | – | 0 | – |
| February | – | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 1 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 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 99.8% 459
- Cancelled 0.2% 1
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 |
|---|---|---|---|---|
| LAS SFO Harry Reid International Airport – San Francisco International Airport | 665 | 18.1 min | 62.6% | 330 |
| SFO LAS San Francisco International Airport – Harry Reid International Airport | 665 | 5.4 min | 80.9% | 115 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 15 | 15 | 80.0% | 0 |
| March 2025 | 11 | 11 | 81.8% | 0 |
| April 2025 | 27 | 27 | 74.1% | 0 |
| May 2025 | 14 | 14 | 71.4% | 0 |
| June 2025 | 19 | 19 | 63.2% | 0 |
| July 2025 | 31 | 30 | 63.3% | 1 |
| August 2025 | 29 | 29 | 65.5% | 0 |
| September 2025 | 26 | 26 | 76.9% | 0 |
| October 2025 | 8 | 8 | 75.0% | 0 |
| November 2025 | 26 | 26 | 69.2% | 0 |
| December 2025 | 30 | 30 | 63.3% | 0 |
| January 2026 | 30 | 30 | 83.3% | 0 |
| February 2026 | 37 | 37 | 78.4% | 0 |
| March 2026 | 44 | 44 | 86.4% | 0 |
| April 2026 | 26 | 26 | 65.4% | 0 |
| May 2026 | 26 | 26 | 42.3% | 0 |
| June 2026 | 30 | 30 | 40.0% | 0 |
| July 2026 | 31 | 31 | 48.4% | 0 |