About 1 in 2 AS 634 flights from Las Vegas arrived 15+ minutes late, diverted or cancelled over the past year (46%); 0.4% were cancelled. The typical flight landed 9 minutes late.
AS 634: LAS → SFO
Scheduled to leave Las Vegas at 6:03 p.m. local time. Over the past year it arrived on time 54% of the time (281 flights), worse than other AS flights on the route at that hour (65%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 45 | 44% |
| Tuesday | 36 | 64% |
| Wednesday | 37 | 62% |
| Thursday | 43 | 53% |
| Friday | 43 | 56% |
| Saturday | 33 | 64% |
| Sunday | 44 | 39% |
Why it was late
All flights LAS → SFO · Connecting off AS 634? Check the risk
Questions
How often is AS 634 from LAS to SFO late?
Alaska Airlines 634 from Las Vegas, NV to San Francisco, CA arrived 15 or more minutes late, was diverted or was cancelled on 46% of 281 scheduled flights between September 2025 and August 2026. 0.4% were cancelled.
Flight numbers change. Figures cover flights with this airline, number and route only. "Likely range" is the 95% interval for the true on-time rate given the number of flights. This is history, not live status: check Alaska Airlines for today's flight. Method.