OnTimeStats

Historical on-time performance

SFOLAS

San Francisco to Las Vegas

414 miData through Dec 2025Source: US DOT · BTS

Flights on SFO–LAS arrive on time 78% of the time over the last 12 months.

On-time rate78%arrived within 15 min
Median delayon timetypical arrival
p90 delay40 min1 in 10 flights is worsetail risk
Cancelled0.6%of scheduled flights

based on 6,053 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • SkyWest Airlines
    On-time58%
    Median10 min
    p9075 min
    Cancel0.0%
    Flights69
  • United Airlinesbest
    On-time84%
    Medianon time
    p9025 min
    Cancel0.3%
    Flights2,685
  • Alaska Airlines
    On-time77%
    Medianon time
    p9045 min
    Cancel1.0%
    Flights1,074
  • Southwest Airlines
    On-time72%
    Medianon time
    p9050 min
    Cancel0.5%
    Flights1,316
  • Frontier Airlines
    On-time71%
    Medianon time
    p9070 min
    Cancel1.2%
    Flights909

Why flights run late

Delay causes

  • Airline28%
  • Weather2%
  • Air traffic (NAS)22%
  • Late aircraft48%
  • Security0%

Most delay minutes here are attributed to Late aircraft.

Over time

On-time trend

By season

On-time rate by month

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Keep exploring

Related pages

Methodology

A flight is on time when it arrives within 15 minutes of schedule — the US DOT / BTS standard. Median and p90(the “1-in-10 bad day”) are read from the full arrival-delay distribution, never averaged across periods.

Figures cover a carrier’s own BTS-coded flights. Cells below ~200 flights are flagged as limited data. All numbers are pre-computed from public BTS On-Time Performance data.