Route reliability record
SGU→PHX
St. George to Phoenix
- Flights
- 889
- Period
- September 2025 to August 2026
- Distance
- 262 mi
- Carriers
- 1
This route lands a B+, 5 points better than the national rate of 77.3%. 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 rests on 889 SGU to PHX flights, with a median arrival 8 minutes early.
Best time to fly SGU to PHX: a 5am–8am departure, ideally on a Saturday. Flights in that window arrived on time 87.7% of the time and Saturday flights 87.6%, against 82.5% for the route overall.
Set against the rest of the country, this route's record is 5 points better than the US average of 77.3%. That gap is worth roughly 52 fewer late arrivals for every thousand flights.
Key figures
On time
82.5%
Arrivals under 15 minutes late, of 886 completed flights
Avg delay
85 min
Across delayed arrivals only, not all flights
Cancelled
0.11%
National rate is 1.89%
Best carrier
SkyWest
82.5% on time across 889 flights
These figures cover 889 flights between September 2025 and August 2026. The median arrival is 8 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 PHX
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 | 889 | 82.5% | 85 min | 0.11% | B+ |
Flight by flight
Flights on SGU to PHX
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 matters more here than the choice of carrier. The gap between the best and worst window is 13 points, against half a point between the best and worst carrier.
- 5am–8am359 flights87.7%
- 8am–11am—
- 11am–2pm315 flights77.4%
- 2pm–5pm176 flights82.9%
- 5pm–8pm39 flights74.4%
- 8pm–5am—
Scale runs 65% to 95%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 87.7% of the time, against 74.4% for the evening window. That is 13 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5am–8am window is the busiest, with 359 flights scheduled in it.
Explore
Filter SGU to PHX 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 PHX, the best departure window is 5am–8am at 87.7% on time and the worst is 5pm–8pm at 74.4%, a wide gap of 13.3 points. All US flights leaving 5am–8am ran 89.3%.
- 5–8am87.7%
- 8–11am—
- 11am–2pm77.4%
- 2–5pm82.9%
- 5–8pm74.4%
- 8pm–5am—
best all US flightsScale 60% to 95%. Cells under 30 flights show a dash.
Across the year
When delays peak on this route
This route's year swings by 16 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.
January is the weak month at 75.0% on time, against 91.3% in March. 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. March was the busiest month here, with 93 flights.
Across the week, Saturday is the strongest day at 87.6% on time and Sunday the weakest at 74.5%, a spread of 13 points.
Delay causes
Why this route gets delayed
Carrier accounts for 60% of the 13,000 delay minutes carriers reported here, and the remaining four split what is left.
- 60%Carrier
- 19%Late-arriving aircraft
- 12%National Airspace System
- 9%Extreme weather
The largest share of delay minutes, 60%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 7,894 of the 13,000 delay minutes reported here. The split is drawn from 13,107 reported delay minutes.
Cancellations are rare at 0.11%, 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
7.0% of arrivals land an hour or more late, close to the national 8.3%, so 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 5am–8am window matters as much as it does.
The return leg runs 83.1% on time across 889 flights, within half a point 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. 889 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 PHX after this flight
What to do with this
Booking this route
Put together: treat all of this as provisional. 889 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 82.5% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 886 completed flights over 12 months sit behind that.
Common questions
SGU to PHX questions
How often is SGU to PHX 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 17.5% of the 889 flights in this analysis, against 22.7% nationally. Delayed flights are late by an hour and a half on average.
How reliable is SGU to PHX compared with the rest of the country?
82.5% of flights arrive on time here against a national 77.3%, a difference of 5 points in its favour. That is worth a B+ on this site's grading scale.
What time of day has the fewest delays on SGU to PHX?
The 5am–8am departure window is the strongest at 87.7% on time. The 5pm–8pm window is the weakest at 74.4%, 13 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 January delays on SGU to PHX?
January is the weakest month at 75.0% on time, compared with 91.3% in March. Across the year that is 16 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
- PHX to SGU — the return legseparate record
- Phoenix Sky Harbor International (PHX) delay statistics
- SGU to SLC, a related route93.0%
- DEN to PHX, a related route75.6%
- SGU to DEN, a related route79.5%
- SkyWest Airlines on-time record82.5%
- The best time of day to fly, according to 7.05 million flight records
- Worst months to fly in the US, ranked by the data
Direction matters. SGU to PHX and PHX 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.