Route reliability record
CLE→LAS
Cleveland to Las Vegas
- Flights
- 1,001
- Period
- September 2025 to August 2026
- Distance
- 1,824 mi
- Carriers
- 4
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 77.3%. The late ones land a little over an hour behind schedule. That rests on 1,001 CLE to LAS flights, with a median arrival 4 minutes early.
Best time to fly CLE to LAS: a 11am–2pm departure, ideally on a Wednesday. Flights in that window arrived on time 78.6% of the time and Wednesday flights 81.5%, against 75.7% for the route overall.
The US average over the same twelve months is 77.3%, 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
75.7%
Arrivals under 15 minutes late, of 981 completed flights
Avg delay
77 min
Across delayed arrivals only, not all flights
Cancelled
1.80%
National rate is 1.89%
Best carrier
Frontier
73.5% on time across 634 flights
These figures cover 1,001 flights between September 2025 and August 2026. Beyond the headline rate, 8.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
Which airline is most reliable on CLE 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 |
|---|---|---|---|---|---|
| Delta Air Linesthin sample | 1 | 100.0% | — | 0.00% | A+ |
| American Airlinesthin sample | 2 | 100.0% | — | 0.00% | A+ |
| Southwest Airlinesthin sample | 364 | 79.4% | 52 min | 0.55% | B+ |
| Frontier Airlines | 634 | 73.5% | 89 min | 2.52% | C |
Flight by flight
Flights on CLE to LAS
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.
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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 1,001 flights.
- 5am–8am130 flights77.0%
- 8am–11am214 flights75.2%
- 11am–2pm157 flights78.6%
- 2pm–5pm227 flights75.2%
- 5pm–8pm65 flights75.4%
- 8pm–5am208 flights74.0%
Scale runs 65% to 85%.
The 11am–2pm window is the strongest at 78.6% on time. The full set of windows spans 5 points.
Explore
Filter CLE to LAS 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 CLE to LAS, the best departure window is 11am–2pm at 78.6% on time and the worst is 8pm–5am at 74.0%, a narrow gap of 4.6 points. All US flights leaving 11am–2pm ran 78.3%.
- 5–8am77.0%
- 8–11am75.2%
- 11am–2pm78.6%
- 2–5pm75.2%
- 5–8pm75.4%
- 8pm–5am74.0%
best all US flightsScale 60% to 95%.
Across the year
When delays peak on this route
This route's year swings by 29 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.
December is the weak month at 59.7% on time, against 88.3% in September. 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. August was the busiest month here, with 93 flights.
Across the week, Wednesday is the strongest day at 81.5% on time and Sunday the weakest at 67.4%, a spread of 14 points.
Delay causes
Why this route gets delayed
Late-arriving aircraft accounts for 57% of the 18,000 delay minutes carriers reported here, and the remaining four split what is left.
- 57%Late-arriving aircraft
- 26%Carrier
- 16%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. Across 18,000 reported delay minutes here, that single category outweighs weather by 41 to one. The split is drawn from 18,425 reported delay minutes.
Cancellations sit at 1.80% against a national 1.89%, which is ordinary. Diversions add another 0.20%.
Connections and stage length
What a delay here actually costs
8.4% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.
At 1,824 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
The return leg runs 73.1% on time across 1,003 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. 1,001 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 LAS after this flight
What to do with this
Booking this route
Put together: treat all of this as provisional. 1,001 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 75.7% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 981 completed flights over 12 months sit behind that.
Common questions
CLE to LAS questions
How often is CLE to LAS 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 24.3% of the 1,001 flights in this analysis, against 22.7% nationally. Delayed flights are late by a little over an hour on average.
How reliable is CLE to LAS compared with the rest of the country?
75.7% of flights arrive on time here against a national 77.3%, 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 CLE to LAS?
The 11am–2pm departure window is the strongest at 78.6% on time. The 8pm–5am window is the weakest at 74.0%, 5 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 December delays on CLE to LAS?
December is the weakest month at 59.7% on time, compared with 88.3% in September. Across the year that is 29 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 CLE — the return legseparate record
- Cleveland Hopkins International (CLE) delay statistics
- Harry Reid International (LAS) delay statistics
- Southwest Airlines on CLE to LAS79.4%
- Frontier Airlines on CLE to LAS73.5%
- CLE to ORD, a related route74.5%
- LAX to LAS, a related route75.8%
- CLE to ATL, a related route84.6%
- Delta Air Lines on-time record100.0%
- American Airlines on-time record100.0%
- Southwest Airlines on-time record79.4%
- Why the first flight of the morning is statistically safest
- Worst months to fly in the US, ranked by the data
Direction matters. CLE to LAS and LAS to CLE 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.