Las Vegas (LAS) to San Francisco (SFO): On-Time Performance
Data through July 2026
The calendar drives reliability on LAS–SFO. March 2026 flights landed on schedule 83% of the time, but July 2026 dropped to 40% — a gap of 43 points. Across the full period the route averages 67% on-time against a national 78%. Morning departures also hold up better than evening ones (73% vs 57%), which matters most in the rough months.
- On-time
- 67%
- arrived <15 min late
- Avg delay
- 21 min
- completed flights
- Cancelled
- 0.7%
- Flights/day
- 17
- last 12 months
- Duration
- 1h 42m
- scheduled
- Distance
- 414 mi
Best airline from LAS to SFO
5 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| United Airlinesmost reliable | 72% | 18 min | 0.4% | 5,450 |
| Alaska Airlines | 67% | 19 min | 1.0% | 2,255 |
| Frontier Airlines | 67% | 22 min | 1.4% | 2,074 |
| SkyWest Airlines | 64% | 28 min | 0.8% | 249 |
| Southwest Airlines | 57% | 24 min | 0.4% | 2,739 |
Monthly on-time trend
Best time to fly from LAS to SFO
Aim for departures around 5 a.m. (95% on-time); avoid 7 p.m. departures (49%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 65% | 24 min |
| Tuesday | 74% | 14 min |
| Wednesday | 70% | 18 min |
| Thursday | 61% | 26 min |
| Friday | 62% | 23 min |
| Saturdaybest | 76% | 13 min |
| Sunday | 63% | 23 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft33%
- Airline operations19%
- National airspace system47%
- Weather2%
Frequently asked questions
- How often are flights from LAS to SFO delayed?
- 33% of LAS–SFO flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 21 minutes.
- Which airline is most reliable from LAS to SFO?
- United Airlines has the best on-time record on this route at 72%, based on 5,450 flights. 5 airlines flew LAS–SFO frequently enough to compare in this period.
- What is the best time of day to fly from LAS to SFO?
- Departures around 5 a.m. have the best record (95% on-time), while departures around 7 p.m. have the worst (49%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from LAS to SFO?
- The scheduled LAS–SFO flight time averages 1h 42m over 414 miles. Actual arrival times vary — flights on this route land 15+ minutes late 33% of the time.
- How often are LAS to SFO flights cancelled?
- 0.7% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from LAS to SFO?
- July 2026 was the roughest month in this dataset, with only 40% of arrivals on time. The best was March 2026 at 83%. If your dates are flexible, that 43-point gap is worth planning around.
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Based on 12,767 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.