Route reliability record
DFW→SGU
Dallas-Fort Worth to St. George
- Flights
- 716
- Period
- July 2025 to June 2026
- Distance
- 976 mi
- Carriers
- 1
This route sits in the middle of the pack with a B+. Close to three flights in four arrive on time by the DOT's definition, 2 points worse than the national rate of 77.6%. The late ones land an hour and a half behind schedule. That rests on 716 DFW to SGU flights, with a median arrival 8 minutes early.
Best time to fly DFW to SGU: a 5pm–8pm departure, ideally on a Tuesday. Flights in that window arrived on time 82.9% of the time and Tuesday flights 80.6%, against 75.2% for the route overall.
The US average over the same twelve months is 77.6%, so there is little to separate this route from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
75.2%
Arrivals under 15 minutes late, of 706 completed flights
Avg delay
84 min
Across delayed arrivals only, not all flights
Cancelled
0.56%
National rate is 1.81%
Best carrier
SkyWest
75.2% on time across 716 flights
These figures cover 716 flights between July 2025 and June 2026. Beyond the headline rate, 11.0% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Carrier by carrier
Which airline is most reliable on DFW 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 | 716 | 75.2% | 84 min | 0.56% | B+ |
Flight by flight
Flights on DFW 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 matters more here than the choice of carrier. The gap between the best and worst window is 12 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am—
- 8am–11am256 flights71.4%
- 11am–2pm—
- 2pm–5pm96 flights80.0%
- 5pm–8pm175 flights82.9%
- 8pm–5am189 flights71.0%
Scale runs 65% to 90%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is the strongest at 82.9% on time. The full set of windows spans 12 points.
Across the year
When delays peak on this route
This route's year swings by 49 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 41.8% on time, 49 points below December, the best at 90.3%. 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. January was the busiest month here, with 62 flights.
Across the week, Tuesday is the strongest day at 80.6% on time and Sunday the weakest at 70.6%. 10 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 42% of the 15,000 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.
- 42%Carrier
- 26%Extreme weather
- 21%Late-arriving aircraft
- 11%National Airspace System
- 0%Security
Extreme weather accounts for 26% 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 4.1 times the usual weather exposure. The split is drawn from 14,728 reported delay minutes.
The largest share of delay minutes, 42%, 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 6,192 of the 15,000 delay minutes reported here.
Cancellations are rare at 0.56%, 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
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 11.0% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.
The 976 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The return leg is a different operation and performs like one: it runs 80.6% on time across 716 flights, 5 points above this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 5 points of difference.
One caution: this is a thin sample. 716 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. 716 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 75.2% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 706 completed flights over 12 months sit behind that.
Common questions
DFW to SGU questions
How often is DFW to SGU delayed?
About one flight in four arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 24.8% of the 716 flights in this analysis, against 22.4% nationally. Delayed flights are late by an hour and a half on average.
How reliable is DFW to SGU compared with the rest of the country?
75.2% of flights arrive on time here against a national 77.6%, a difference of 2 points against it. That is worth a B+ on this site's grading scale.
What time of day has the fewest delays on DFW to SGU?
The 5pm–8pm departure window is the strongest at 82.9% on time. The 8pm–5am window is the weakest at 71.0%, 12 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 DFW to SGU?
June is the weakest month at 41.8% on time, compared with 90.3% in December. Across the year that is 49 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 DFW — the return legseparate record
- Dallas/Fort Worth International (DFW) delay statistics
- DFW to ORD, a related route67.6%
- SLC to SGU, a related route92.1%
- DFW to LGA, a related route67.1%
- SkyWest Airlines on-time record75.2%
- How often a connection fails at the major US hubs
- The best time of day to fly, according to 7.04 million flight records
Direction matters. DFW to SGU and SGU to DFW 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.