Flight number record
OO 4813
SkyWest Airlines · Phoenix to St. George
- Route
- PHX → SGU
- Departs
- 14:37
- Flights
- 264
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 4813, check with SkyWest Airlines. SkyWest Airlines flies under contract for larger airlines, so a ticket for this flight may show a different airline code and number.
OO 4813 lands a B+, 5 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That rests on 264 flights, with a median arrival 7 minutes early.
Set against the rest of the country, OO 4813's record is 5 points better than the US average of 77.3%. That gap is worth roughly 49 fewer late arrivals for every thousand flights.
Key figures
On time
82.2%
Arrivals under 15 minutes late, of 264 completed flights
Avg delay
80 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
1 hour+ late
8.0%
National rate is 8.3%
These figures cover 264 flights between September 2025 and August 2026. Beyond the headline rate, 8.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When OO 4813 flies
OO 4813 flies PHX to SGU without a single fixed slot. Its most common scheduled departure was 14:37, used on 62 of 264 flights, with 14:38 (34 flights) and 13:35 (30 flights) next.
- Departs 14:3762 flights23.5%
- Departs 14:3834 flights12.9%
- Departs 13:3530 flights11.4%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 14:37 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and OO 4813 runs 10 points better at 82.2%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
OO 4813 next to PHX to SGU
Every carrier on PHX to SGU combined arrived on time 83.1% of the time across 889 flights, so OO 4813 is about level with it. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 4 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 4813thin sample | 264 | 82.2% | 80 min | 0.00% | B+ |
| All SkyWest Airlines on PHX–SGU | 889 | 83.1% | 78 min | 0.11% | B+ |
| All carriers on PHX–SGU | 889 | 83.1% | 78 min | 0.11% | B+ |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 4813 quarter by quarter
OO 4813 did not run the same all year. Its best quarter was Jan–Mar 2026 at 88.9% on time and its weakest Jul–Sep 2026 at 70.9%, a swing of 18 points on roughly 66 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Oct–Dec 202560 flights85.0%
- Jan–Mar 202672 flights88.9%
- Apr–Jun 202677 flights81.8%
- Jul–Sep 202655 flights70.9%
Scale runs 60% to 95%.
By weekday, OO 4813 ranged from 76.7% on Saturday to 84.8% on Thursday. With about 38 flights behind each day, a spread of 8 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late OO 4813 runs when it is late
OO 4813 often beats the schedule: 73 of 264 completed flights, 28%, arrived 15 minutes or more early. The 47 late arrivals split 16 under half an hour, 10 between 30 and 60 minutes, and 21 an hour or more.
- 15+ min early73 flights27.7%
- Within 15 min144 flights54.5%
- 15–29 min late16 flights6.1%
- 30–59 min late10 flights3.8%
- 1–2 hours late13 flights4.9%
- 2+ hours late8 flights3.0%
Scale runs 0% to 100%.
Share of 264 completed flights by arrival against schedule.
10 of 52 late departures made up the time and arrived on time, 19% of them. Only 5 left on time and still arrived late.
The worst days
Worst days for OO 4813
The latest arrival of the period was on 10 August 2026, 6 hours 19 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 10 August 2026 | 6 hours 19 minutes | Late-arriving aircraft |
| 13 June 2026 | 4 hours 54 minutes | Late-arriving aircraft |
| 17 June 2026 | 4 hours 52 minutes | Carrier |
| 26 December 2025 | 4 hours 36 minutes | Late-arriving aircraft |
| 12 August 2026 | 3 hours 4 minutes | Carrier |
Delay causes
Why OO 4813 runs late
Late-arriving aircraft accounts for 51% of the 3,752 delay minutes carriers reported here, and the remaining four split what is left.
- 51%Late-arriving aircraft
- 42%Carrier
- 5%National Airspace System
- 1%Extreme weather
51% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 3,752 reported delay minutes here, that single category outweighs weather by 51 to one. The split is drawn from 3,752 delay minutes reported on OO 4813.
Cancellations are rare at 0.00%, below the national 1.89% and low enough to earn the plus on the grade. Almost no flights are called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
8.0% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.
Every one of the 264 flights under OO 4813 in the data flew PHX to SGU. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 264 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking OO 4813
For a booking, read OO 4813 as 82.2% on time with 0.00% cancelled over 264 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- PHX to SGU, every carrier and departure
- SGU to PHX, the return direction
- SkyWest Airlines 4811 on the same route80.5%
- SkyWest Airlines 4815 on the same route87.4%
- Phoenix Sky Harbor International (PHX) delay statistics
- SkyWest Airlines on-time record
- Every SkyWest Airlines flight number with a record
- The most and least reliable flight numbers in the US
- Why the first flight of the morning is statistically safest
A flight number here means SkyWest Airlines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.