Route reliability record
SLC→OKC
Salt Lake City to Oklahoma City
- Flights
- 720
- Period
- July 2025 to June 2026
- Distance
- 866 mi
- Carriers
- 1
This route earns an A+. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 12 points better than the national rate of 77.6%. When something does go wrong the average delay runs about 50 minutes. That rests on 720 SLC to OKC flights, with a median arrival 9 minutes early.
Best time to fly SLC to OKC: a 11am–2pm departure, ideally on a Saturday. Flights in that window arrived on time 95.3% of the time and Saturday flights 94.9%, against 89.9% for the route overall.
Set against the rest of the country, this route's record is 12 points better than the US average of 77.6%. That gap is worth roughly 123 fewer late arrivals for every thousand flights.
Key figures
On time
89.9%
Arrivals under 15 minutes late, of 715 completed flights
Avg delay
51 min
Across delayed arrivals only, not all flights
Cancelled
0.56%
National rate is 1.81%
Best carrier
SkyWest
89.9% on time across 720 flights
These figures cover 720 flights between July 2025 and June 2026. The median arrival is 9 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 SLC to OKC
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 | 720 | 89.9% | 51 min | 0.56% | A+ |
Flight by flight
Flights on SLC to OKC
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 10 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–11am3 flights—
- 11am–2pm86 flights95.3%
- 2pm–5pm273 flights93.7%
- 5pm–8pm21 flights—
- 8pm–5am337 flights85.3%
Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.
The best window here is not the first bank but the 11am–2pm slot at 95.3% on time, ahead of 8pm–5am at 85.3%. 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 8pm–5am window is the busiest, with 337 flights scheduled in it.
Across the year
When delays peak on this route
This route's year swings by 21 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.
July is the worst month at 77.4% on time, 21 points below September, the best at 98.3%. 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. March was the busiest month here, with 62 flights.
Across the week, Saturday is the strongest day at 94.9% on time and Thursday the weakest at 85.1%. 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 67% of the 3,648 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.
- 67%Carrier
- 25%Extreme weather
- 8%National Airspace System
Extreme weather accounts for 25% 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 4.0 times the usual weather exposure. The split is drawn from 3,648 reported delay minutes.
The largest share of delay minutes, 67%, 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 2,440 of the 3,648 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
Badly late arrivals are rare here: only 2.8% land an hour or more behind schedule, against 8.1% 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.
The 866 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 runs 92.5% on time across 720 flights, within 3 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. 720 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 OKC after this flight
What to do with this
Booking this route
Put together: treat all of this as provisional. 720 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 89.9% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 715 completed flights over 12 months sit behind that.
Common questions
SLC to OKC questions
How often is SLC to OKC delayed?
About one flight in ten arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 10.1% of the 720 flights in this analysis, against 22.4% nationally. Delayed flights are late by about 50 minutes on average.
How reliable is SLC to OKC compared with the rest of the country?
89.9% of flights arrive on time here against a national 77.6%, a difference of 12 points in its favour. That is worth a A+ on this site's grading scale.
What time of day has the fewest delays on SLC to OKC?
The 11am–2pm departure window is the strongest at 95.3% on time. The 8pm–5am window is the weakest at 85.3%, 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 July delays on SLC to OKC?
July is the weakest month at 77.4% on time, compared with 98.3% in September. Across the year that is 21 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
- OKC to SLC — the return legseparate record
- Salt Lake City International (SLC) delay statistics
- SLC to DEN, a related route77.8%
- DFW to OKC, a related route72.4%
- SLC to PHX, a related route83.9%
- SkyWest Airlines on-time record89.9%
- The best time of day to fly, according to 7.04 million flight records
- Worst months to fly in the US, ranked by the data
Direction matters. SLC to OKC and OKC to SLC 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.