Flight number record

OO 4318

SkyWest Airlines · Salt Lake City to Cedar City

Route: SLC → CDC
Departs: 07:45
Flights: 359
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s OO 4318, 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 4318 earns an A+. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 17 points better than the national rate of 77.3%. When something does go wrong the average delay runs roughly 50 minutes. That rests on 359 flights, with a median arrival 17 minutes early.

Set against the rest of the country, OO 4318's record is 17 points better than the US average of 77.3%. That gap is worth roughly 171 fewer late arrivals for every thousand flights.

On time

94.4%

Arrivals under 15 minutes late, of 357 completed flights

Avg delay

52 min

Across delayed arrivals only, not all flights

Cancelled

0.56%

National rate is 1.89%

1 hour+ late

1.4%

National rate is 8.3%

These figures cover 359 flights between September 2025 and August 2026. The median arrival is 17 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 4318 flies

OO 4318 flies SLC to CDC without a single fixed slot. Its most common scheduled departure was 07:45, used on 230 of 359 flights, with 09:45 (64 flights) next.

Departs 07:45230 flights64.1%
Departs 09:4564 flights17.8%

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 07:45 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and OO 4318 runs 5 points better at 94.4%. 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 4318 next to SLC to CDC

Every carrier on SLC to CDC combined arrived on time 94.7% of the time across 631 flights, so OO 4318 is about level with it. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 16 points.

OO 4318 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 4318thin sample	359	94.4%	52 min	0.56%	A+
All SkyWest Airlines on SLC–CDC	631	94.7%	65 min	0.48%	A+
All carriers on SLC–CDC	631	94.7%	65 min	0.48%	A+
SkyWest Airlines, whole network	855,406	78.7%	88 min	1.79%	B

Across the year

OO 4318 quarter by quarter

Quarter by quarter OO 4318 held fairly steady: 96.7% in Jul–Sep 2025, 93.3% in Oct–Dec 2025, 95.5% in Jan–Mar 2026, 95.5% in Apr–Jun 2026 and 91.7% in Jul–Sep 2026. A spread of 5 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202530 flights96.7%
Oct–Dec 202591 flights93.3%
Jan–Mar 202689 flights95.5%
Apr–Jun 202689 flights95.5%
Jul–Sep 202660 flights91.7%

Scale runs 85% to 100%.

By weekday, OO 4318 ranged from 92.0% on Thursday to 98.0% on Tuesday. With about 51 flights behind each day, a spread of 6 points is inside normal variation, so the day you fly is not worth changing for this flight.

Arrival by arrival

How late OO 4318 runs when it is late

OO 4318 often beats the schedule: 202 of 357 completed flights, 57%, arrived 15 minutes or more early. Most of the lateness is short. 12 of the 20 late arrivals were under half an hour behind, and 5 reached an hour or more.

15+ min early202 flights56.6%
Within 15 min135 flights37.8%
15–29 min late12 flights3.4%
30–59 min late3 flights0.8%
1–2 hours late3 flights0.8%
2+ hours late2 flights0.6%

Scale runs 0% to 100%.

Share of 357 completed flights by arrival against schedule.

Only 15 of 357 completed flights left 15 minutes late or more, too few to say how often the time is made up.

The worst days

Worst days for OO 4318

The latest arrival of the period was on 18 February 2026, 3 hours 32 minutes behind schedule; most of its delay minutes were filed as extreme weather. On three of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).

The latest arrivals of OO 4318 in the period
Date	Arrived late by	Largest filed cause
18 February 2026	3 hours 32 minutes	Extreme weather
2 January 2026	3 hours 9 minutes	Carrier
15 November 2025	1 hour 47 minutes	Carrier
2 July 2026	1 hour 32 minutes	Carrier
2 April 2026	1 hour 16 minutes	National Airspace System

Delay causes

Why OO 4318 runs late

Carrier accounts for 69% of the 1,036 delay minutes carriers reported here, and the remaining four split what is left.

Carrier
69%
National Airspace System
17%
Extreme weather
14%

Extreme weather accounts for 14% 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 2.3 times the usual weather exposure. The split is drawn from 1,036 delay minutes reported on OO 4318.

Cancellations are rare at 0.56%, 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

Badly late arrivals are rare here: only 1.4% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.

OO 4318 is not only a SLC to CDC flight. It also flew CDC to SLC (359 flights, 96.1% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.

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.

Other routes flown as OO 4318
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
CDC to SLCthin sample	359	96.1%	57 min	0.56%	A+

What to do with this

Booking OO 4318

For a booking, OO 4318 has one of the better records a US domestic flight can show: 94.4% on time and 0.56% 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