Flight number record

OO 4811

SkyWest Airlines · Phoenix to St. George

Route: PHX → SGU
Departs: 08:35
Flights: 364
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 4811, 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 4811 lands a B+, 4 points better than the national rate of 77.6%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 364 flights, with a median arrival 4 minutes early.

On time

81.5%

Arrivals under 15 minutes late, of 363 completed flights

Avg delay

60 min

Across delayed arrivals only, not all flights

Cancelled

0.00%

National rate is 1.81%

1 hour+ late

6.9%

National rate is 8.1%

These figures cover 364 flights between July 2025 and June 2026. The median arrival is 4 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.

Schedule

When OO 4811 flies

OO 4811 flies PHX to SGU without a single fixed slot. Its most common scheduled departure was 08:35, used on 72 of 364 flights, with 08:40 (59 flights) and 08:54 (44 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 08:3572 flights19.8%
Departs 08:4059 flights16.2%
Departs 08:5444 flights12.1%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.

A 08:35 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and OO 4811 runs 3 points worse at 81.5%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

OO 4811 next to PHX to SGU

Every carrier on PHX to SGU combined arrived on time 83.9% of the time across 900 flights, so OO 4811 is 2 points behind it. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 3 points.

OO 4811 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 4811thin sample	364	81.5%	60 min	0.00%	B+
All SkyWest Airlines on PHX–SGU	900	83.9%	83 min	0.11%	B+
All carriers on PHX–SGU	900	83.9%	83 min	0.11%	B+
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 4811 quarter by quarter

Quarter by quarter OO 4811 held fairly steady: 83.5% in Jul–Sep 2025, 78.3% in Oct–Dec 2025, 84.4% in Jan–Mar 2026 and 80.0% in Apr–Jun 2026. A spread of 6 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202591 flights83.5%
Oct–Dec 202592 flights78.3%
Jan–Mar 202690 flights84.4%
Apr–Jun 202691 flights80.0%

Scale runs 70% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, OO 4811 ranged from 76.9% on Wednesday to 86.3% on Sunday. With about 52 flights behind each day, a spread of 9 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why OO 4811 runs late

One category carries most of the weight here. Carrier accounts for 50% of the 4,035 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Carrier
50%
Late-arriving aircraft
25%
Extreme weather
12%
National Airspace System
12%
Security
0%

Extreme weather accounts for 12% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.0 times the usual weather exposure. The split is drawn from 4,035 delay minutes reported on OO 4811.

Cancellations are rare at 0.00%, below the national 1.81% 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

6.9% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.

Every one of the 364 flights under OO 4811 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. 364 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 4811

For a booking, read OO 4811 as 81.5% on time with 0.00% cancelled over 364 flights. Those are rates from the past twelve months, not a forecast for any particular 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures