Flight number record

OO 4817

SkyWest Airlines · Dallas-Fort Worth to St. George

Route: DFW → SGU
Departs: 19:05
Flights: 365
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 4817, 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 4817 lands a B+, about a point worse than the national rate of 77.6%. About one flight in four arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 365 flights, with a median arrival 9 minutes early.

On time

76.8%

Arrivals under 15 minutes late, of 357 completed flights

Avg delay

78 min

Across delayed arrivals only, not all flights

Cancelled

0.82%

National rate is 1.81%

1 hour+ late

10.6%

National rate is 8.1%

These figures cover 365 flights between July 2025 and June 2026. Beyond the headline rate, 10.6% 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 4817 flies

OO 4817 flies DFW to SGU without a single fixed slot. Its most common scheduled departure was 19:05, used on 54 of 365 flights, with 19:00 (45 flights) and 21:14 (41 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 19:0554 flights14.8%
Departs 19:0045 flights12.3%
Departs 21:1441 flights11.2%

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 19:05 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and OO 4817 runs 9 points better at 76.8%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

OO 4817 next to DFW to SGU

Every carrier on DFW to SGU combined arrived on time 75.2% of the time across 716 flights, so OO 4817 is 2 points ahead of it. Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 2 points.

OO 4817 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 4817	365	76.8%	78 min	0.82%	B+
All SkyWest Airlines on DFW–SGU	716	75.2%	84 min	0.56%	B+
All carriers on DFW–SGU	716	75.2%	84 min	0.56%	B+
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 4817 quarter by quarter

OO 4817 did not run the same all year. Its best quarter was Oct–Dec 2025 at 87.0% on time and its weakest Jul–Sep 2025 at 66.7%, a swing of 20 points on roughly 91 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 202592 flights66.7%
Oct–Dec 202592 flights87.0%
Jan–Mar 202690 flights85.2%
Apr–Jun 202691 flights67.8%

Scale runs 60% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, OO 4817 did best on Tuesday at 86.3% on time and worst on Monday at 73.1%. Each day rests on about 52 flights, so a gap of 13 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 4817 runs late

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 6,450 reported delay minutes.

Carrier
39%
Extreme weather
32%
Late-arriving aircraft
20%
National Airspace System
8%
Security
1%

Extreme weather accounts for 32% 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 5.1 times the usual weather exposure. The split is drawn from 6,450 delay minutes reported on OO 4817.

Cancellations are rare at 0.82%, 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. 10.6% 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 365 flights under OO 4817 in the data flew DFW 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. 365 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 4817

For a booking, read OO 4817 as 76.8% on time with 0.82% cancelled over 365 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