SFO to LAS flight delays & on-time performance
Nonstop flights from San Francisco International Airport to Harry Reid International Airport · 414 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at SFO or LAS right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from San Francisco (SFO) to Las Vegas (LAS) arrived on time 73% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 0.7% were cancelled, and 10% arrived an hour or more late.
- United Airlines was the most punctual airline here (79% on time); Frontier Airlines was the least (64%).
- Departures scheduled around 5am did best (95% on time); around 10pm did worst (51%).
- Saturday was the most reliable day to fly (83% on time) and Thursday the least (66%).
- The largest source of delay minutes was late-arriving aircraft (58%).
Which airline is most on time from SFO to LAS?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| United Airlines | 79% | 0.4% | 13 min | 6.8% | 2,793 |
| Alaska Airlines | 75% | 0.5% | 17 min | 10.2% | 1,114 |
| Southwest Airlines | 64% | 0.7% | 24 min | 14.0% | 1,314 |
| Frontier Airlines | 64% | 1.7% | 33 min | 15.7% | 895 |
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 50% | 0.0% | 41 min | 50.0% | 2 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 5am95%376 flights
- 6am93%156 flights
- 7am95%245 flights
- 8am89%638 flights
- 9am67%176 flights
- 10am66%440 flights
- 11am57%280 flights
- 12pm73%273 flights
- 1pm64%412 flights
- 2pm59%273 flights
- 3pm61%298 flights
- 4pm61%444 flights
- 5pm74%377 flights
- 6pm71%192 flights
- 7pm77%415 flights
- 8pm72%230 flights
- 9pm67%407 flights
- 10pm51%239 flights
- 11pm81%247 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday70%1.1% cancelled
- Tuesday78%0.4% cancelled
- Wednesday77%0.3% cancelled
- Thursday66%0.9% cancelled
- Friday69%0.8% cancelled
- Saturday83%0.2% cancelled
- Sunday70%0.7% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft58%
- Airline (crew, maintenance, cleaning, fueling)23%
- Air traffic control & airport congestion18%
- Extreme weather1%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)48%
- Air traffic control & airport congestion30%
- Extreme weather23%
- Security0%
SFO to LAS: common questions
- How often are SFO to LAS flights on time?
- 73% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from San Francisco to Las Vegas cancelled?
- 0.7% of scheduled flights were cancelled (40 of 6,118).
- How long are typical delays?
- Across all flights the average arrival delay was 19 min (early arrivals count as zero). Flights that were late arrived 65 min behind schedule on average, and 10.3% of flights were an hour or more late.
- How long is taxi time at SFO?
- Flights on this route spent 21 min taxiing from the gate to takeoff on average.
Related routes
Return trip: LAS to SFO — 61% on time
More flights from San Francisco
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: SFO → LAS, nonstop flights by US airlines that report to the DOT. How we calculate this.