Route reliability record
SGU→SLC
St. George to Salt Lake City
- Flights
- 1,727
- Period
- September 2025 to August 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 77.3%. When something does go wrong the average delay runs a little over an hour. That rests on 1,727 SGU to SLC flights, with a median arrival 14 minutes early.
Best time to fly SGU to SLC: a 5am–8am departure, ideally on a Wednesday. Flights in that window arrived on time 96.9% of the time and Wednesday flights 95.7%, against 93.0% for the route overall.
Set against the rest of the country, this route's record is 16 points better than the US average of 77.3%. That gap is worth roughly 157 fewer late arrivals for every thousand flights.
Key figures
On time
93.0%
Arrivals under 15 minutes late, of 1,724 completed flights
Avg delay
69 min
Across delayed arrivals only, not all flights
Cancelled
0.17%
National rate is 1.89%
Best carrier
SkyWest
93.0% on time across 1,727 flights
These figures cover 1,727 flights between September 2025 and August 2026. The median arrival is 14 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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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 | 1,727 | 93.0% | 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.
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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 1,727 flights.
- 5am–8am358 flights96.9%
- 8am–11am283 flights94.3%
- 11am–2pm563 flights93.0%
- 2pm–5pm353 flights87.3%
- 5pm–8pm170 flights94.1%
- 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 96.9% of the time, against 87.3% 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 563 flights scheduled in it.
Explore
Filter SGU to SLC by airline, time, month and day
Pick a breakdown and a carrier. The dashed mark on each row is the same slice for every US flight.
On SGU to SLC, the best departure window is 5am–8am at 96.9% on time and the worst is 2pm–5pm at 87.3%, a real gap of 9.6 points. All US flights leaving 5am–8am ran 89.3%.
- 5–8am96.9%
- 8–11am94.3%
- 11am–2pm93.0%
- 2–5pm87.3%
- 5–8pm94.1%
- 8pm–5am—
best all US flightsScale 60% to 100%. Cells under 30 flights show a dash.
Across the year
When delays peak on this route
Twelve months, one bar each, drawn from the same 1,727 flights. The strip shows how much of this route's record is set by the calendar rather than by the operation.
August is the worst month at 87.9% on time, 9 points below November, 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, Wednesday is the strongest day at 95.7% on time and Saturday the weakest at 89.6%, a spread of 6 points.
Delay causes
Why this route gets delayed
Carrier accounts for 73% of the 8,393 delay minutes carriers reported here, and the remaining four split what is left.
- 73%Carrier
- 18%Extreme weather
- 8%National Airspace System
Extreme weather accounts for 18% 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 3.0 times the usual weather exposure. The split is drawn from 8,393 reported delay minutes.
The largest share of delay minutes, 73%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 6,152 of the 8,393 delay minutes reported here.
Cancellations are rare at 0.17%, 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 stage length
What a delay here actually costs
Badly late arrivals are rare here: only 2.4% 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.
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 91.4% on time across 1,727 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 1,727 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 August 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. 1,724 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 7.0% of the 1,727 flights in this analysis, against 22.7% 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?
93.0% of flights arrive on time here against a national 77.3%, 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 96.9% on time. The 2pm–5pm window is the weakest at 87.3%, 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 August delays on SGU to SLC?
August is the weakest month at 87.9% on time, compared with 96.6% in November. 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
- SLC to SGU — the return legseparate record
- Salt Lake City International (SLC) delay statistics
- SGU to DEN, a related route79.5%
- DEN to SLC, a related route78.2%
- SGU to PHX, a related route82.5%
- SkyWest Airlines on-time record93.0%
- The most punctual routes in the US, and the least
- The best time of day to fly, according to 7.05 million flight records
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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.