Route reliability record
OKC→SLC
Oklahoma City to Salt Lake 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 15 points better than the national rate of 77.6%. When something does go wrong the average delay runs an hour and a half. That rests on 720 OKC to SLC flights, with a median arrival 9 minutes early.
Set against the rest of the country, this route's record is 15 points better than the US average of 77.6%. That gap is worth roughly 149 fewer late arrivals for every thousand flights.
Key figures
On time
92.5%
Arrivals under 15 minutes late, of 716 completed flights
Avg delay
88 min
Across delayed arrivals only, not all flights
Cancelled
0.56%
National rate is 1.81%
Best carrier
SkyWest
92.5% 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 OKC to SLC
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 | 92.5% | 88 min | 0.56% | A+ |
Flight by flight
Flights on OKC to SLC
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 720 flights.
- 5am–8am—
- 8am–11am365 flights92.6%
- 11am–2pm3 flights—
- 2pm–5pm—
- 5pm–8pm352 flights92.3%
- 8pm–5am—
Scale runs 85% to 100%. Rows with fewer than 30 flights show a dash.
The 8am–11am window is the strongest at 92.6% on time. The full set of windows spans half a point.
Across the year
When delays peak on this route
Twelve months, one bar each, drawn from the same 720 flights. The strip shows how much of this route's record is set by the calendar rather than by the operation.
January is the weak month at 88.9% on time, against 96.7% in June. 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 62 flights.
Across the week, Sunday is the strongest day at 96.1% on time and Tuesday the weakest at 87.7%. 8 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 83% of the 4,769 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.
- 83%Carrier
- 14%Extreme weather
- 3%National Airspace System
Extreme weather accounts for 14% 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 2.3 times the usual weather exposure. The split is drawn from 4,769 reported delay minutes.
The largest share of delay minutes, 83%, 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 3,963 of the 4,769 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 2.9% 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 89.9% 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 SLC 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 92.5% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 716 completed flights over 12 months sit behind that.
Common questions
OKC to SLC questions
How often is OKC to SLC delayed?
Roughly one flight in twelve arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 7.5% of the 720 flights in this analysis, against 22.4% nationally. Delayed flights are late by an hour and a half on average.
How reliable is OKC to SLC compared with the rest of the country?
92.5% of flights arrive on time here against a national 77.6%, a difference of 15 points in its favour. That is worth a A+ on this site's grading scale.
Does the departure time change the odds on OKC to SLC?
Not by much in this data. Every departure window falls within half a point of the others, so there is no hour worth rearranging a trip for. The overall rate of 92.5% is the figure to plan against.
How bad are January delays on OKC to SLC?
January is the weakest month at 88.9% on time, compared with 96.7% in June. Across the year that is 8 points between the best and worst months. The seasonal swing is modest enough that it should not decide when you travel.
Related
Where to go next
- SLC to OKC — the return legseparate record
- Salt Lake City International (SLC) delay statistics
- OKC to DFW, a related route78.5%
- DEN to SLC, a related route77.5%
- OKC to DEN, a related route79.2%
- SkyWest Airlines on-time record92.5%
- How to read this site: grades, sample sizes, and honest caveats
- Late aircraft, weather, or the airline: what actually causes US flight delays
Direction matters. OKC to SLC and SLC to OKC 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.