Route reliability record
OKC→LAS
Oklahoma City to Las Vegas
- Flights
- 1,223
- Period
- July 2025 to June 2026
- Distance
- 986 mi
- Carriers
- 3
This route lands a B+, 3 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 1,223 OKC to LAS flights, with a median arrival 7 minutes early.
Best time to fly OKC to LAS: a 5am–8am departure, ideally on a Saturday. Flights in that window arrived on time 96.7% of the time and Saturday flights 86.7%, against 80.6% 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
80.6%
Arrivals under 15 minutes late, of 1,215 completed flights
Avg delay
58 min
Across delayed arrivals only, not all flights
Cancelled
0.57%
National rate is 1.81%
Best carrier
Southwest
80.5% on time across 1,061 flights
These figures cover 1,223 flights between July 2025 and June 2026. The median arrival is 7 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 LAS
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 |
|---|---|---|---|---|---|
| Frontier Airlinesthin sample | 140 | 83.5% | 107 min | 0.71% | B+ |
| Southwest Airlines | 1,061 | 80.5% | 51 min | 0.57% | B+ |
| Allegiant Airthin sample | 22 | 68.2% | 106 min | 0.00% | C+ |
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 35 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–8am362 flights96.7%
- 8am–11am6 flights—
- 11am–2pm255 flights82.6%
- 2pm–5pm194 flights72.4%
- 5pm–8pm225 flights74.9%
- 8pm–5am181 flights61.3%
Scale runs 55% to 100%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is where this operation falls apart: 61.3% on time, against 96.7% for the 5am–8am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 5am–8am window is the busiest, with 362 flights scheduled in it.
Across the year
When delays peak on this route
This route's year swings by 25 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 68.7% on time, 25 points below December, the best at 93.4%. 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. June was the busiest month here, with 115 flights.
Across the week, Saturday is the strongest day at 86.7% on time and Thursday the weakest at 76.3%. 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. Late-arriving aircraft accounts for 57% of the 14,000 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.
- 57%Late-arriving aircraft
- 24%Carrier
- 17%National Airspace System
- 1%Extreme weather
- 0%Security
57% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 14,000 reported delay minutes here, that single category outweighs weather by 45 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 13,658 reported delay minutes.
The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 96.7% on time here.
Cancellations are rare at 0.57%, 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 4.5% 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 986 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 76.2% on time across 1,225 flights, 4 points below 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 4 points of difference.
The sample behind these figures is 1,223 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
Work out the risk of missing a connection in LAS after this flight
What to do with this
Booking this route
Put together: the calendar is the biggest lever here, not the carrier or the hour. December runs 93.4% on time and June 68.7%, a swing of 25 points. If the dates move at all, move them out of June before you think about anything else. 1,215 completed flights over 12 months sit behind that.
Common questions
OKC to LAS questions
How often is OKC to LAS delayed?
About one flight in five arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 19.4% of the 1,223 flights in this analysis, against 22.4% nationally. Delayed flights are late by about an hour on average.
How reliable is OKC to LAS compared with the rest of the country?
80.6% of flights arrive on time here against a national 77.6%, a difference of 3 points in its favour. That is worth a B+ on this site's grading scale.
What time of day has the fewest delays on OKC to LAS?
The 5am–8am departure window is the strongest at 96.7% on time. The 8pm–5am window is the weakest at 61.3%, 35 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 OKC to LAS?
June is the weakest month at 68.7% on time, compared with 93.4% in December. Across the year that is 25 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
- LAS to OKC — the return legseparate record
- Harry Reid International (LAS) delay statistics
- Frontier Airlines on OKC to LAS83.5%
- Southwest Airlines on OKC to LAS80.5%
- OKC to DFW, a related route78.5%
- LAX to LAS, a related route76.5%
- OKC to DEN, a related route79.2%
- Frontier Airlines on-time record83.5%
- Southwest Airlines on-time record80.5%
- Allegiant Air on-time record68.2%
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.04 million flight records
Direction matters. OKC to LAS and LAS 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.