What is the best time of day to fly out of St George?

6–8am. Departures in that band left on time 95.1% of the time across 1,903 flights, July 2023 through June 2026 — the best of the ten bands in the day. The 12–2pm band was the weakest at 81.3%.

What is the worst month to fly out of SGU?

June: 81.6% of the departures that flew left on time, with 967 scheduled. September was the other end of the year at 92%. Each figure pools three years of that calendar month.

How often are flights cancelled at SGU?

0.2% of scheduled departures were cancelled over July 2023 through June 2026. Cancellations are counted against everything scheduled, not against everything that flew — a rate that looks small still adds up to real people in a rebooking line.

Best time to fly out of St George (SGU)

Name: Departure on-time record for St George Regional Airport (SGU)
Creator: Bureau of Transportation Statistics
License: https://www.usa.gov/government-works

The early-flight folk wisdom holds up at St George: departures in the 6–8am band left on time 95.1% of the time, against 81.3% in the 12–2pm band. These are historical odds, not forecasts. The records say what happened on this schedule over three years; they know nothing about tomorrow’s thunderstorm.

Data through June 2026 · Bureau of Transportation Statistics

On-time rate by hour and day

On this page, “on time” means a departure that pushed back less than 15 minutes behind its scheduled time — the Bureau of Transportation Statistics definition, and the one airlines are held to.

Share of departures that left on time, by hour band and day of week.
Departure time	Mon	Tue	Wed	Thu	Fri	Sat	Sun
Before 6am	93	90	94	93	92	92	90
6–8am	96	94	97	94	94	95	96
8–10am	–	–	–	–	–	–	–
10am–12pm	87	84	88	86	91	87	88
12–2pm	82	82	86	80	83	79	79
2–4pm	91	92	92	91	89	92	89
4–6pm	82	85	83	82	81	84	82
6–8pm	84	87	89	84	89	–	86
8–10pm	–	–	–	–	–	–	–
10pm–12am	–	–	–	–	–	–	–

fewer left on time more left on time

The steadiest stretch at SGU was 6–8am — 95.1% of departures left on time across 1,903 flights. The weakest was 12–2pm at 81.3%. 6–8am departures from SGU left on time 95.1% of the time across 1,903 flights; 6–8pm departures, 86.3% across 673. That is a gap of 8.8 points, and it is the whole case for the early flight.

The year at SGU

June was the hard month at SGU: 81.6% of departures left on time, across 967 flights. September was the easy one at 92%. Each month pools three years of that month, so a single bad week does not decide it.

Share of departures that left on time, by calendar month. Best month in green, worst in amber. The hairline sits at the overall rate, 87.8%.

Departure on-time share at SGU by calendar month
Month	Share departures that left on time	Flights
January	87.4%	902
February	86.5%	877
March	89.7%	1,040
April	87.1%	1,035
May	87.5%	1,070
June	81.6%	967
July	84.7%	792
August	86.7%	804
September	92%	916
October	88.9%	1,093
November	89.5%	970
December	91.2%	901

Airlines at SGU

Every airline with at least 100 departures from SGU, busiest first. These are that airline’s departures from this airport only — its record across the country sits on its own page.

Airline	Left on time	Typical delay	Cancelled	Departures
SkyWest Airlines	87.8%	99 min	0.2%	11,367

What delays out of SGU were put down to

Airlines file a reason with every arrival running 15 minutes late or more. Across 1,599 flights that departed SGU and ran 15 minutes late or more, the delay minutes break down with 57% put down to airline operations and 19.2% to late-arriving aircraft.

Late-arriving aircraft 19.2%
Airline operations 57%
Air traffic & airport volume 12.9%
Severe weather 10.7%
Security 0.1%

Late-arriving aircraft is the knock-on category: the plane came in late, so it went out late again. It is why a 7am problem in Newark is still a problem in Denver at dinnertime, and why it is usually the biggest slice on the bar.

If you are connecting through SGU

Of 11,370 scheduled arrivals into SGU, 84.4% reached the gate less than 15 minutes behind schedule. Of the 1,708 arrivals that ran late, 55.7% were no more than 45 minutes behind — which is the difference between a tight connection and a new boarding pass.

Work out a specific layover — pick the airport and the minutes you have, and the tool reads the same arrival records back as a share.

Busiest routes out of SGU

Ranked by flights, with the share that arrived on time at the far end. Where a route carries enough flights for a page of its own the chip goes there; otherwise it goes to the destination airport.

SLC 92.3% on time · 4,550 flights
DEN 80% on time · 2,635 flights
PHX 83.7% on time · 2,292 flights
DFW 78% on time · 1,282 flights
LAX 87.3% on time · 602 flights
ORD Not enough flights to say · 6 flights

St George (SGU)

Rank 164 of 363 US airports by departures. Steadiest stretch of the day: 6–8am. Hardest month: June.

July 2023–June 2026 · 11,348 departures flown

87.8% of departures left on time

Questions about SGU

What is the best time of day to fly out of St George?: 6–8am. Departures in that band left on time 95.1% of the time across 1,903 flights, July 2023 through June 2026 — the best of the ten bands in the day. The 12–2pm band was the weakest at 81.3%.
Is the early flight out of SGU really more reliable?: 6–8am departures from SGU left on time 95.1% of the time across 1,903 flights; 6–8pm departures, 86.3% across 673. That is a gap of 8.8 points, and it is the whole case for the early flight.
What is the worst month to fly out of SGU?: June: 81.6% of the departures that flew left on time, with 967 scheduled. September was the other end of the year at 92%. Each figure pools three years of that calendar month.
How often are flights cancelled at SGU?: 0.2% of scheduled departures were cancelled over July 2023 through June 2026. Cancellations are counted against everything scheduled, not against everything that flew — a rate that looks small still adds up to real people in a rebooking line.