OnTimeStats

Historical on-time performance

Ontario to Santa Rosa

423 miData through May 2026Source: US DOT · BTS

Flights on ONT–STS arrive on time 93% of the time over the last 12 months.

On-time rate93%arrived within 15 min
p90 delay5 min1 in 10 flights is worse (tail risk)
Cancelled0.0%of scheduled flights

based on 30 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • SkyWest Airlines
    On-time93%
    Medianon time
    p905 min
    Cancel0.0%
    Flights30

Why flights run late

Delay causes

  • Airline19%
  • Weather0%
  • Air traffic (NAS)81%
  • Late aircraft0%
  • Security0%

Most delay minutes here are attributed to Air traffic (NAS).

Over time

On-time trend

The monthly trend appears once more than one month of data is loaded. Currently showing a single month.

By season

On-time rate by month

The seasonal pattern appears once multiple months of the year are loaded.

Keep exploring

Related pages

Delay predictorfor this route→ONT airportOntario→STS airportSanta Rosa→SkyWest Airlinesairline profile→

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.