Flight number record

OO 4810

SkyWest Airlines · St. George to Phoenix

Route: SGU → PHX
Departs: 07:30
Flights: 359
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s OO 4810, 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 4810 earns an A+. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 10 points better than the national rate of 77.3%. When something does go wrong the average delay runs close to two hours. That rests on 359 flights, with a median arrival 14 minutes early.

Set against the rest of the country, OO 4810's record is 10 points better than the US average of 77.3%. That gap is worth roughly 104 fewer late arrivals for every thousand flights.

On time

87.7%

Arrivals under 15 minutes late, of 358 completed flights

Avg delay

105 min

Across delayed arrivals only, not all flights

Cancelled

0.28%

National rate is 1.89%

1 hour+ late

5.9%

National rate is 8.3%

These figures cover 359 flights between September 2025 and August 2026. The median arrival is 14 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.

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Schedule

When OO 4810 flies

OO 4810 flies SGU to PHX without a single fixed slot. Its most common scheduled departure was 07:30, used on 252 of 359 flights, with 07:25 (70 flights) and 06:22 (37 flights) next.

Departs 07:30252 flights70.2%
Departs 07:2570 flights19.5%
Departs 06:2237 flights10.3%

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 07:30 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and OO 4810 runs level with that at 87.7%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

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Against the route

OO 4810 next to SGU to PHX

Every carrier on SGU to PHX combined arrived on time 82.5% of the time across 889 flights, so OO 4810 is 5 points ahead of it. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 9 points.

OO 4810 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 4810thin sample	359	87.7%	105 min	0.28%	A+
All SkyWest Airlines on SGU–PHX	889	82.5%	85 min	0.11%	B+
All carriers on SGU–PHX	889	82.5%	85 min	0.11%	B+
SkyWest Airlines, whole network	855,406	78.7%	88 min	1.79%	B

Across the year

OO 4810 quarter by quarter

Quarter by quarter OO 4810 held fairly steady: 86.7% in Jul–Sep 2025, 88.0% in Oct–Dec 2025, 86.5% in Jan–Mar 2026, 87.9% in Apr–Jun 2026 and 89.3% in Jul–Sep 2026. A spread of 3 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202530 flights86.7%
Oct–Dec 202592 flights88.0%
Jan–Mar 202690 flights86.5%
Apr–Jun 202691 flights87.9%
Jul–Sep 202656 flights89.3%

Scale runs 80% to 95%.

By weekday, OO 4810 did best on Monday at 92.5% on time and worst on Wednesday at 80.4%. Each day rests on about 51 flights, so a gap of 12 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late OO 4810 runs when it is late

OO 4810 often beats the schedule: 171 of 358 completed flights, 48%, arrived 15 minutes or more early. The 44 late arrivals split 13 under half an hour, 10 between 30 and 60 minutes, and 21 an hour or more.

15+ min early171 flights47.8%
Within 15 min143 flights39.9%
15–29 min late13 flights3.6%
30–59 min late10 flights2.8%
1–2 hours late6 flights1.7%
2+ hours late15 flights4.2%

Scale runs 0% to 100%.

Share of 358 completed flights by arrival against schedule.

5 of 37 late departures made up the time and arrived on time, 14% of them. 12 flights left on time and still arrived late.

The worst days

Worst days for OO 4810

The latest arrival of the period was on 2 January 2026, 7 hours behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on five of the five worst days.

The latest arrivals of OO 4810 in the period
Date	Arrived late by	Largest filed cause
2 January 2026	7 hours	Carrier
13 March 2026	6 hours 51 minutes	Carrier
28 May 2026	5 hours 25 minutes	Carrier
15 February 2026	5 hours 15 minutes	Carrier
22 May 2026	4 hours 57 minutes	Carrier

Delay causes

Why OO 4810 runs late

Carrier accounts for 87% of the 4,628 delay minutes carriers reported here, and the remaining four split what is left.

Carrier
87%
National Airspace System
6%
Extreme weather
4%
Late-arriving aircraft
3%

The largest share of delay minutes, 87%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 4,035 of the 4,628 delay minutes reported here. The split is drawn from 4,628 delay minutes reported on OO 4810.

Cancellations are rare at 0.28%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

Connections and routes

What a delay on this flight costs

5.9% 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 close to two hours, which a normal layover absorbs.

Every one of the 359 flights under OO 4810 in the data flew SGU to PHX. 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. 359 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 4810

For a booking, OO 4810 has one of the better records a US domestic flight can show: 87.7% on time and 0.28% cancelled. That is a base rate, not a promise about any single day.

Where to go next

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 22 October 2026; recomputed monthly. How this data is collected.

Key figures