Route reliability record
SLC→SGU
Salt Lake City to St. George
- Flights
- 1,725
- Period
- July 2025 to June 2026
- Distance
- 272 mi
- Carriers
- 1
This route 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 15 points better than the national rate of 77.6%. When something does go wrong the average delay runs a little over an hour. That rests on 1,725 SLC to SGU flights, with a median arrival 12 minutes early.
Best time to fly SLC to SGU: a 8am–11am departure, ideally on a Tuesday. Flights in that window arrived on time 94.2% of the time and Tuesday flights 94.4%, against 92.1% for the route overall.
Set against the rest of the country, this route's record is 15 points better than the US average of 77.6%. That gap is worth roughly 145 fewer late arrivals for every thousand flights.
Key figures
On time
92.1%
Arrivals under 15 minutes late, of 1,720 completed flights
Avg delay
71 min
Across delayed arrivals only, not all flights
Cancelled
0.17%
National rate is 1.81%
Best carrier
SkyWest
92.1% on time across 1,725 flights
These figures cover 1,725 flights between July 2025 and June 2026. The median arrival is 12 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.
Carrier by carrier
Which airline is most reliable on SLC to SGU
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| SkyWest Airlines | 1,725 | 92.1% | 71 min | 0.17% | A+ |
Flight by flight
Flights on SLC to SGU
The flight numbers below flew this route at least 250 times in the period, busiest first. Each has its own record, with its schedule and delay causes.
Departure window
The best time of day to leave
Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 1,725 flights.
- 5am–8am—
- 8am–11am296 flights94.2%
- 11am–2pm610 flights93.1%
- 2pm–5pm97 flights88.7%
- 5pm–8pm360 flights88.3%
- 8pm–5am362 flights93.4%
Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.
The overnight block holds up unusually well at 93.4% on time across 362 flights. Red-eyes fly into empty airspace and empty gates, and they are the first rotation of the aircraft's day rather than the last. The 11am–2pm window is the busiest, with 610 flights scheduled in it.
Across the year
When delays peak on this route
Twelve months, one bar each, drawn from the same 1,725 flights. The strip shows how much of this route's record is set by the calendar rather than by the operation.
July is the worst month at 87.3% on time, 9 points below December, the best at 96.6%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. October was the busiest month here, with 178 flights.
Across the week, Tuesday is the strongest day at 94.4% on time and Sunday the weakest at 90.3%. 4 points is a smaller lever than departure hour, but it is free.
Delay causes
Why this route gets delayed
One category carries most of the weight here. Carrier accounts for 88% of the 9,672 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.
- 88%Carrier
- 7%Extreme weather
- 5%National Airspace System
The largest share of delay minutes, 88%, 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 8,545 of the 9,672 delay minutes reported here. The split is drawn from 9,672 reported delay minutes.
Cancellations are rare at 0.17%, 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 stage length
What a delay here actually costs
Badly late arrivals are rare here: only 3.0% land an hour or more behind schedule, against 8.1% 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.
At 272 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 8am–11am window matters as much as it does.
The return leg runs 93.7% on time across 1,725 flights, within 2 points of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
The sample behind these figures is 1,725 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
Work out the risk of missing a connection in SGU after this flight
What to do with this
Booking this route
Put together: this route's record is 92.1% on time with 0.17% cancelled, worth an A+. The largest single lever is the 8am–11am departure window, and the numbers below the table are where the reasoning behind that lives. 1,720 completed flights over 12 months sit behind that.
Common questions
SLC to SGU questions
How often is SLC to SGU delayed?
About one flight in twelve arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 7.9% of the 1,725 flights in this analysis, against 22.4% nationally. Delayed flights are late by a little over an hour on average.
How reliable is SLC to SGU compared with the rest of the country?
92.1% of flights arrive on time here against a national 77.6%, a difference of 15 points in its favour. That is worth a A+ on this site's grading scale.
What time of day has the fewest delays on SLC to SGU?
The 8am–11am departure window is the strongest at 94.2% on time. The 5pm–8pm window is the weakest at 88.3%, 6 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are July delays on SLC to SGU?
July is the weakest month at 87.3% on time, compared with 96.6% in December. Across the year that is 9 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
- SGU to SLC — the return legseparate record
- Salt Lake City International (SLC) delay statistics
- SLC to DEN, a related route77.8%
- DEN to SGU, a related route79.7%
- SLC to PHX, a related route83.9%
- SkyWest Airlines on-time record92.1%
- Worst months to fly in the US, ranked by the data
- The best time of day to fly, according to 7.04 million flight records
Direction matters. SLC to SGU and SGU to SLC are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
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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.