San Francisco (SFO) to Las Vegas (LAS): On-Time Performance
Data through July 2026
San Francisco (SFO) to Las Vegas (LAS) effectively runs on two schedules. In April 2025, 84% of arrivals were on time; in April 2026 that fell to 60% — a 23-point seasonal swing. Across the full period the route averages 75% on-time against a national 78%. Morning departures also hold up better than evening ones (82% vs 73%), which matters most in the rough months.
- On-time
- 75%
- arrived <15 min late
- Avg delay
- 17 min
- completed flights
- Cancelled
- 0.7%
- Flights/day
- 17
- last 12 months
- Duration
- 1h 41m
- scheduled
- Distance
- 414 mi
Best airline from SFO to LAS
5 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| United Airlinesmost reliable | 81% | 11 min | 0.4% | 5,448 |
| Alaska Airlines | 74% | 16 min | 0.8% | 2,255 |
| Southwest Airlines | 69% | 20 min | 0.5% | 2,744 |
| Frontier Airlines | 66% | 29 min | 1.6% | 2,081 |
| SkyWest Airlines | 62% | 26 min | 0.8% | 247 |
Monthly on-time trend
Best time to fly from SFO to LAS
Aim for departures around 5 a.m. (96% on-time); avoid 2 p.m. departures (62%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 73% | 19 min |
| Tuesday | 81% | 12 min |
| Wednesday | 80% | 12 min |
| Thursday | 67% | 23 min |
| Friday | 70% | 22 min |
| Saturdaybest | 84% | 10 min |
| Sunday | 71% | 19 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft55%
- Airline operations24%
- National airspace system19%
- Weather1%
Frequently asked questions
- How often are flights from SFO to LAS delayed?
- 25% of SFO–LAS 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 17 minutes.
- Which airline is most reliable from SFO to LAS?
- United Airlines has the best on-time record on this route at 81%, based on 5,448 flights. 5 airlines flew SFO–LAS frequently enough to compare in this period.
- What is the best time of day to fly from SFO to LAS?
- Departures around 5 a.m. have the best record (96% on-time), while departures around 2 p.m. have the worst (62%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from SFO to LAS?
- The scheduled SFO–LAS flight time averages 1h 41m over 414 miles. Actual arrival times vary — flights on this route land 15+ minutes late 25% of the time.
- How often are SFO to LAS 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 SFO to LAS?
- April 2026 was the roughest month in this dataset, with only 60% of arrivals on time. The best was April 2025 at 84%. If your dates are flexible, that 23-point gap is worth planning around.
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Based on 12,775 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.