Route reliability record
SGU→SLC
St. George to Salt Lake City
- Flights
- 1,725
- Period
- July 2025 to June 2026
- Distance
- 272 mi
- Carriers
- 1
This route earns an A+. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 16 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 SGU to SLC flights, with a median arrival 15 minutes early.
Best time to fly SGU to SLC: a 5am–8am departure, ideally on a Wednesday. Flights in that window arrived on time 98.1% of the time and Wednesday flights 95.2%, against 93.7% for the route overall.
Set against the rest of the country, this route's record is 16 points better than the US average of 77.6%. That gap is worth roughly 161 fewer late arrivals for every thousand flights.
Key figures
On time
93.7%
Arrivals under 15 minutes late, of 1,722 completed flights
Avg delay
69 min
Across delayed arrivals only, not all flights
Cancelled
0.17%
National rate is 1.81%
Best carrier
SkyWest
93.7% on time across 1,725 flights
These figures cover 1,725 flights between July 2025 and June 2026. The median arrival is 15 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 SGU to SLC
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 | 93.7% | 69 min | 0.17% | A+ |
Flight by flight
Flights on SGU to SLC
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–8am364 flights98.1%
- 8am–11am289 flights94.8%
- 11am–2pm552 flights93.4%
- 2pm–5pm349 flights88.3%
- 5pm–8pm171 flights94.2%
- 8pm–5am—
Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 98.1% of the time, against 88.3% for the afternoon window. That is 10 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 11am–2pm window is the busiest, with 552 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.
February is the weak month at 90.1% on time, against 96.6% in November. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. October was the busiest month here, with 178 flights.
Across the week, Wednesday is the strongest day at 95.2% on time and Saturday the weakest at 89.8%. 5 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 75% of the 7,513 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.
- 75%Carrier
- 16%Extreme weather
- 9%National Airspace System
Extreme weather accounts for 16% 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 monthly strip above is the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.6 times the usual weather exposure. The split is drawn from 7,513 reported delay minutes.
The largest share of delay minutes, 75%, 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 5,636 of the 7,513 delay minutes reported here.
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 2.2% 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 5am–8am window matters as much as it does.
The return leg runs 92.1% 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 SLC after this flight
What to do with this
Booking this route
Put together: take the 5am–8am departure, avoid February if the dates are flexible, and if two carriers are within a few dollars of each other, SkyWest is the one with the record behind it. None of that guarantees an on-time arrival; it moves the odds by 10 points, which is the most any booking decision can do. 1,722 completed flights over 12 months sit behind that.
Common questions
SGU to SLC questions
How often is SGU to SLC delayed?
About one flight in fifteen arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 6.3% 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 SGU to SLC compared with the rest of the country?
93.7% of flights arrive on time here against a national 77.6%, a difference of 16 points in its favour. That is worth a A+ on this site's grading scale.
What time of day has the fewest delays on SGU to SLC?
The 5am–8am departure window is the strongest at 98.1% on time. The 2pm–5pm window is the weakest at 88.3%, 10 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 February delays on SGU to SLC?
February is the weakest month at 90.1% on time, compared with 96.6% in November. Across the year that is 7 points between the best and worst months. The seasonal swing is modest enough that it should not decide when you travel.
Related
Where to go next
- SLC to SGU — the return legseparate record
- Salt Lake City International (SLC) delay statistics
- SGU to DEN, a related route79.6%
- DEN to SLC, a related route77.5%
- SGU to PHX, a related route82.4%
- SkyWest Airlines on-time record93.7%
- The best time of day to fly, according to 7.04 million flight records
- Late aircraft, weather, or the airline: what actually causes US flight delays
Direction matters. SGU to SLC and SLC to SGU 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.