Route reliability record
PHX→SGU
Phoenix to St. George
- Flights
- 900
- Period
- July 2025 to June 2026
- Distance
- 262 mi
- Carriers
- 1
This route lands a B+, 6 points better than the national rate of 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That is a workable record, not a spotless one. That rests on 900 PHX to SGU flights, with a median arrival 6 minutes early.
Best time to fly PHX to SGU: a 11am–2pm departure, ideally on a Tuesday. Flights in that window arrived on time 88.3% of the time and Tuesday flights 88.3%, against 83.9% for the route overall.
Set against the rest of the country, this route's record is 6 points better than the US average of 77.6%. That gap is worth roughly 63 fewer late arrivals for every thousand flights.
Key figures
On time
83.9%
Arrivals under 15 minutes late, of 896 completed flights
Avg delay
83 min
Across delayed arrivals only, not all flights
Cancelled
0.11%
National rate is 1.81%
Best carrier
SkyWest
83.9% on time across 900 flights
These figures cover 900 flights between July 2025 and June 2026. The median arrival is 6 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 PHX 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 | 900 | 83.9% | 83 min | 0.11% | B+ |
Flight by flight
Flights on PHX 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 900 flights.
- 5am–8am—
- 8am–11am364 flights81.5%
- 11am–2pm60 flights88.3%
- 2pm–5pm149 flights83.9%
- 5pm–8pm16 flights—
- 8pm–5am311 flights85.4%
Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.
The best window here is not the first bank but the 11am–2pm slot at 88.3% on time, ahead of 8am–11am at 81.5%. Where the curve peaks mid-day rather than at dawn, the constraint is usually congestion at one end rather than the aircraft's own rotation. The 8am–11am window is the busiest, with 364 flights scheduled in it.
Across the year
When delays peak on this route
This route's year swings by 14 points from best month to worst, which is wide. An annual average tells you very little about the week you are actually flying, so read the strip rather than the headline if your dates are fixed.
June is the worst month at 75.0% on time, 14 points below February, the best at 88.5%. 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. March was the busiest month here, with 93 flights.
Across the week, Tuesday is the strongest day at 88.3% on time and Wednesday the weakest at 81.8%. 7 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 60% of the 12,000 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.
- 60%Carrier
- 25%Late-arriving aircraft
- 11%National Airspace System
- 5%Extreme weather
- 0%Security
The largest share of delay minutes, 60%, 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 7,141 of the 12,000 delay minutes reported here. The split is drawn from 11,934 reported delay minutes.
Cancellations are rare at 0.11%, 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
6.7% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last an hour and a half, which a normal layover absorbs.
At 262 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 11am–2pm window matters as much as it does.
The return leg runs 82.4% on time across 900 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.
One caution: this is a thin sample. 900 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.
Work out the risk of missing a connection in SGU after this flight
What to do with this
Booking this route
Put together: treat all of this as provisional. 900 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 83.9% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 896 completed flights over 12 months sit behind that.
Common questions
PHX to SGU questions
How often is PHX to SGU delayed?
About one flight in six arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 16.1% of the 900 flights in this analysis, against 22.4% nationally. Delayed flights are late by an hour and a half on average.
How reliable is PHX to SGU compared with the rest of the country?
83.9% of flights arrive on time here against a national 77.6%, a difference of 6 points in its favour. That is worth a B+ on this site's grading scale.
What time of day has the fewest delays on PHX to SGU?
The 11am–2pm departure window is the strongest at 88.3% on time. The 8am–11am window is the weakest at 81.5%, 7 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 June delays on PHX to SGU?
June is the weakest month at 75.0% on time, compared with 88.5% in February. Across the year that is 14 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 PHX — the return legseparate record
- Phoenix Sky Harbor International (PHX) delay statistics
- PHX to DEN, a related route77.2%
- SLC to SGU, a related route92.1%
- PHX to LAX, a related route82.8%
- SkyWest Airlines on-time record83.9%
- Worst months to fly in the US, ranked by the data
- How to read this site: grades, sample sizes, and honest caveats
Direction matters. PHX to SGU and SGU to PHX 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.