Flight AS634
Alaska Airlines flight AS634
Looking for AS634 in the air…
Alerts at this flight's airports
Las Vegas (LAS) to San Francisco (SFO)
Historically, this flight arrives 15+ minutes late 46% of the time, and when it is late the delay averages 57 minutes. It was cancelled 0.4% of the time.
- On-time arrivals
- 53.9%
- Less than 15 minutes late
- Cancelled
- 0.4%
- Of scheduled flights
- Average delay when late
- 57 min
- Flights arriving 15+ minutes late
- Flights tracked
- 281
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 49%
- Late-arriving aircraft 43%
- Airline (crew, maintenance, cleaning) 6%
- Extreme weather 1%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
San Francisco (SFO) to Las Vegas (LAS)
Historically, this flight arrives 15+ minutes late 11% of the time, and when it is late the delay averages 41 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 88.9%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 41 min
- Flights arriving 15+ minutes late
- Flights tracked
- 63
- Scheduled flights in the period
What caused the delays
- Extreme weather 48%
- Late-arriving aircraft 37%
- Air traffic control & airport 10%
- Airline (crew, maintenance, cleaning) 5%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 57.7% | 26 |
| October 2025 | 75.0% | 8 |
| November 2025 | 69.2% | 26 |
| December 2025 | 63.3% | 30 |
| January 2026 | 80.0% | 30 |
| February 2026 | 86.5% | 37 |
| March 2026 | 88.6% | 44 |
| April 2026 | 42.3% | 26 |
| May 2026 | 26.9% | 26 |
| June 2026 | 33.3% | 30 |
| July 2026 | 45.2% | 31 |
| August 2026 | 41.4% | 30 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data