Flight number record

OO 4818

SkyWest Airlines · St. George to Dallas-Fort Worth

Route: SGU → DFW
Departs: 11:00
Flights: 357
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 4818, 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 4818 sits in the middle of the pack with a C+. About seven flights in ten arrive on time by the DOT's definition, 7 points worse than the national rate of 77.6%. The late ones land an hour and a half behind schedule. That rests on 357 flights, with a median arrival 4 minutes early.

The national on-time rate over the same period is 77.6%, so OO 4818 runs 7 points behind the country as a whole. Across a thousand flights that is about 74 extra late arrivals.

On time

70.2%

Arrivals under 15 minutes late, of 352 completed flights

Avg delay

85 min

Across delayed arrivals only, not all flights

Cancelled

0.28%

National rate is 1.81%

1 hour+ late

12.8%

National rate is 8.1%

These figures cover 357 flights between July 2025 and June 2026. Beyond the headline rate, 12.8% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Schedule

When OO 4818 flies

OO 4818 flies SGU to DFW without a single fixed slot. Its most common scheduled departure was 11:00, used on 87 of 357 flights, with 11:02 (54 flights) and 10:53 (41 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 11:0087 flights24.4%
Departs 11:0254 flights15.1%
Departs 10:5341 flights11.5%

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 11:00 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and OO 4818 runs 9 points worse at 70.2%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

OO 4818 next to SGU to DFW

Every carrier on SGU to DFW combined arrived on time 80.6% of the time across 716 flights, so OO 4818 is 10 points behind it. Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 9 points.

OO 4818 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 4818thin sample	357	70.2%	85 min	0.28%	C+
All SkyWest Airlines on SGU–DFW	716	80.6%	94 min	0.42%	B+
All carriers on SGU–DFW	716	80.6%	94 min	0.42%	B+
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 4818 quarter by quarter

OO 4818 did not run the same all year. Its best quarter was Jul–Sep 2025 at 81.1% on time and its weakest Apr–Jun 2026 at 56.1%, a swing of 25 points on roughly 89 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.

Jul–Sep 202591 flights81.1%
Oct–Dec 202591 flights72.5%
Jan–Mar 202690 flights69.7%
Apr–Jun 202685 flights56.1%

Scale runs 50% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, OO 4818 did best on Friday at 84.3% on time and worst on Saturday at 62.2%. Each day rests on about 51 flights, so a gap of 22 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 4818 runs late

One category carries most of the weight here. Carrier accounts for 62% of the 8,876 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
62%
Late-arriving aircraft
20%
National Airspace System
11%
Extreme weather
7%

The largest share of delay minutes, 62%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 5,538 of the 8,876 delay minutes reported here. The split is drawn from 8,876 delay minutes reported on OO 4818.

Cancellations are rare at 0.28%, below the national 1.81% 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

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 12.8% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.

The 976 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

Every one of the 357 flights under OO 4818 in the data flew SGU to DFW. 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. 357 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 4818

For a booking, OO 4818 is a flight to put a long connection behind. 12.8% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.

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