Flight profile · SkyWest Airlines
OO4321
Salt Lake City (SLC) to St George (SGU) · scheduled 1:30 PM – 2:40 PM
How OO4321 performs
496 operations, 2025-02-01 to 2026-06-30.
OO4321 arrived on time 92.3% of the time, against 90.9% for all SLC → SGU flights — this specific departure is 1.5 percentage points better than the route as a whole. Against SkyWest Airlines’s own flights on this route it is 1.5 points better.
Source: US DOT Bureau of Transportation Statistics · 496 operations between 2025-02-01 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| OO4321 | 92.3% | 0.00% | -12 min | 3.0% | 496 |
| SkyWest Airlines on SLC → SGU | 90.9% | 0.07% | -10 min | 2.8% | 4,551 |
| All SLC → SGU flights | 90.9% | 0.07% | -10 min | 2.8% | 4,551 |
Source: FlyerIntel analysis of US DOT BTS data · 2025-02-01 to 2026-06-30
Other routes OO4321 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 |
|---|---|---|---|
| SGU→SLC St George to Salt Lake City | 2025-02-01 – 2026-06-30 | 495 | 88.9% |
| BTM→SLC Butte to Salt Lake City | 2023-11-22 – 2025-01-02 | 2 | — |
| SLC→BTM Salt Lake City to Butte | 2023-11-22 – 2025-01-02 | 2 | — |
| PLN→DTW Pellston to Detroit | 2024-02-01 – 2024-09-09 | 188 | 77.5% |
| DTW→PLN Detroit to Pellston | 2024-02-01 – 2024-09-09 | 186 | 75.8% |
Because the same number has served different journeys, the statistics above describe only the route OO4321 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 496 records of OO4321 operating SLC → SGU, 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.