Flight profile · SkyWest Airlines
OO4099
Los Angeles (LAX) to Reno (RNO) · scheduled 9:59 AM – 11:28 AM
How OO4099 performs
981 operations, 2023-09-05 to 2026-06-30.
OO4099 arrived on time 91.3% of the time, against 86.7% for all LAX → RNO flights — this specific departure is 4.6 percentage points better than the route as a whole. Against SkyWest Airlines’s own flights on this route it is 2.5 points better.
Source: US DOT Bureau of Transportation Statistics · 981 operations between 2023-09-05 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| OO4099 | 91.3% | 0.31% | -11 min | 3.4% | 981 |
| SkyWest Airlines on LAX → RNO | 88.7% | 0.35% | -9 min | 3.8% | 6,261 |
| All LAX → RNO flights | 86.7% | 0.42% | -9 min | 4.3% | 8,098 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-09-05 to 2026-06-30
By day of week
Does OO4099 run worse on particular days?
Tuesday is historically the most reliable day and Thursday the least, a gap of 10.2 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · 2023-09-05 to 2026-06-30 · Days with fewer than 120 operations are not scored.
Other routes OO4099 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 |
|---|---|---|---|
| RNO→LAX Reno to Los Angeles | 2023-09-05 – 2026-06-30 | 976 | 88.4% |
| SAN→LAX San Diego to Los Angeles | 2023-07-01 – 2023-12-15 | 104 | 86.5% |
| LAX→SAN Los Angeles to San Diego | 2023-07-01 – 2023-12-15 | 103 | 89.3% |
| SLC→MFR Salt Lake City to Medford | 2023-11-04 – 2023-11-04 | 1 | — |
| DTW→LAN Detroit to Lansing | 2023-11-01 – 2023-11-03 | 3 | — |
| LAN→DTW Lansing to Detroit | 2023-11-01 – 2023-11-03 | 3 | — |
Because the same number has served different journeys, the statistics above describe only the route OO4099 currently operates. Blending them would produce an average of two different flights.
Why OO4099 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding, fuelling — within the carrier’s control
weather severe enough to stop this flight specifically
airspace and airport capacity, including weather-driven flow control
Share of the delay minutes US DOT attributed to each cause for OO4099 on LAX → RNO. 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 → RNO
Same airports, same journey — and not the same odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| OO5410 | SkyWest Airlines | 91.6% | 8 min early | 716 |
| OO4126 | SkyWest Airlines | 89.2% | 10 min early | 902 |
| OO3929 | SkyWest Airlines | 86.8% | 10 min early | 840 |
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 981 records of OO4099 operating LAX → RNO, 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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