Flight profile · SkyWest Airlines
OO4001
Los Angeles (LAX) to San Diego (SAN) · scheduled 9:20 AM – 3:19 PM
How OO4001 performs
354 operations, 2024-02-02 to 2026-06-30.
OO4001 arrived on time 85.0% of the time, against 86.3% for all LAX → SAN flights — this specific departure is 1.3 percentage points worse than the route as a whole. Against SkyWest Airlines’s own flights on this route it is 1.1 points worse.
Source: US DOT Bureau of Transportation Statistics · 354 operations between 2024-02-02 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| OO4001 | 85.0% | 0.28% | -3 min | 3.4% | 354 |
| SkyWest Airlines on LAX → SAN | 86.1% | 0.53% | -7 min | 4.2% | 6,614 |
| All LAX → SAN flights | 86.3% | 0.53% | -7 min | 4.2% | 6,837 |
Source: FlyerIntel analysis of US DOT BTS data · 2024-02-02 to 2026-06-30
Other routes OO4001 has flown
A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| SAN→LAX San Diego to Los Angeles | 2024-01-08 – 2026-01-16 | 583 | 80.2% |
| PDX→SEA Portland to Seattle | 2024-12-21 – 2026-01-04 | 28 | — |
| SEA→PDX Seattle to Portland | 2024-12-21 – 2026-01-04 | 28 | — |
| EVV→ATL Evansville to Atlanta | 2024-05-07 – 2024-06-06 | 31 | — |
| MDW→DTW Chicago to Detroit | 2024-04-09 – 2024-05-06 | 28 | — |
| JFK→MKE New York to Milwaukee | 2023-11-05 – 2023-12-15 | 41 | — |
| TWF→SLC Twin Falls to Salt Lake City | 2023-10-28 – 2023-11-04 | 8 | — |
| JFK→PIT New York to Pittsburgh | 2023-10-09 – 2023-10-27 | 19 | — |
| JFK→BOS New York to Boston | 2023-09-05 – 2023-09-15 | 11 | — |
| GRB→DTW Green Bay to Detroit | 2023-07-01 – 2023-09-04 | 66 | — |
Because the same number has served different journeys, the statistics above describe only the route OO4001 currently operates. Blending them would produce an average of two different flights.
Why OO4001 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding, fuelling — within the carrier’s control
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for OO4001 on LAX → SAN. A single late flight can carry more than one cause, and only delays of fifteen minutes or more are attributed at all.
Other departures on LAX → SAN
Same airports, same journey — and not the same odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| OO5612 | SkyWest Airlines | 89.6% | 10 min early | 660 |
| OO5415 | SkyWest Airlines | 87.4% | 7 min early | 865 |
| OO3746 | SkyWest Airlines | 85.9% | 9 min early | 1,016 |
| OO4643 | SkyWest Airlines | 85.6% | 6 min early | 1,076 |
| OO4087 | SkyWest Airlines | 84.2% | 5 min early | 846 |
| OO4018 | SkyWest Airlines | 83.4% | 3 min early | 742 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. Schedules change; confirm the departure still operates before booking around this.
Data and methodology
Calculated by FlyerIntel from 354 records of OO4001 operating LAX → SAN, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.
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