Route reliability record
SLC→OKC
Salt Lake City to Oklahoma City
- Flights
- 720
- Period
- September 2025 to August 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 77.3%. When something does go wrong the average delay runs about an hour. That rests on 720 SLC to OKC flights, with a median arrival 9 minutes early.
Best time to fly SLC to OKC: a 2pm–5pm departure, ideally on a Tuesday. Flights in that window arrived on time 93.7% of the time and Tuesday flights 94.2%, against 89.5% for the route overall.
Set against the rest of the country, this route's record is 12 points better than the US average of 77.3%. That gap is worth roughly 122 fewer late arrivals for every thousand flights.
Key figures
On time
89.5%
Arrivals under 15 minutes late, of 714 completed flights
Avg delay
58 min
Across delayed arrivals only, not all flights
Cancelled
0.56%
National rate is 1.89%
Best carrier
SkyWest
89.5% on time across 720 flights
These figures cover 720 flights between September 2025 and August 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.
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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 | 89.5% | 58 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.
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
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–11am12 flights—
- 11am–2pm79 flights89.9%
- 2pm–5pm271 flights93.7%
- 5pm–8pm28 flights—
- 8pm–5am330 flights86.5%
Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.
The best window here is not the first bank but the 2pm–5pm slot at 93.7% on time, ahead of 8pm–5am at 86.5%. 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 330 flights scheduled in it.
Explore
Filter SLC to OKC 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 SLC to OKC, the best departure window is 2pm–5pm at 93.7% on time and the worst is 8pm–5am at 86.5%, a real gap of 7.2 points. All US flights leaving 2pm–5pm ran 71.9%.
- 5–8am—
- 8–11am—
- 11am–2pm89.9%
- 2–5pm93.7%
- 5–8pm—
- 8pm–5am86.5%
best all US flightsScale 60% to 100%. Cells under 30 flights show a dash.
Across the year
When delays peak on this route
This route's year swings by 26 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 72.1% on time, 26 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, Tuesday is the strongest day at 94.2% on time and Thursday the weakest at 82.2%, a spread of 12 points.
Delay causes
Why this route gets delayed
Carrier accounts for 64% of the 4,346 delay minutes carriers reported here, and the remaining four split what is left.
- 64%Carrier
- 28%Extreme weather
- 9%National Airspace System
Extreme weather accounts for 28% 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 4.6 times the usual weather exposure. The split is drawn from 4,346 reported delay minutes.
The largest share of delay minutes, 64%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,762 of the 4,346 delay minutes reported here.
Cancellations are rare at 0.56%, 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
Badly late arrivals are rare here: only 3.4% land an hour or more behind schedule, against 8.3% 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.
The return leg is a different operation and performs like one: it runs 92.7% on time across 720 flights, 3 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 3 points of difference.
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 89.5% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 714 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 10.5% of the 720 flights in this analysis, against 22.7% nationally. Delayed flights are late by about an hour on average.
How reliable is SLC to OKC compared with the rest of the country?
89.5% of flights arrive on time here against a national 77.3%, 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 2pm–5pm departure window is the strongest at 93.7% on time. The 8pm–5am window is the weakest at 86.5%, 7 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 72.1% on time, compared with 98.3% in September. Across the year that is 26 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 route79.0%
- DFW to OKC, a related route73.0%
- SLC to PHX, a related route83.5%
- SkyWest Airlines on-time record89.5%
- The most punctual routes in the US, and the least
- 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.