Route reliability record
LAS→MIA
Las Vegas to Miami
- Flights
- 1,376
- Period
- September 2025 to August 2026
- Distance
- 2,174 mi
- Carriers
- 4
This route lands a B+, 5 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That rests on 1,376 LAS to MIA flights, with a median arrival 10 minutes early.
Best time to fly LAS to MIA: a 5am–8am departure, ideally on a Tuesday. Flights in that window arrived on time 87.8% of the time and Tuesday flights 88.8%, against 82.6% for the route overall.
Set against the rest of the country, this route's record is 5 points better than the US average of 77.3%. That gap is worth roughly 53 fewer late arrivals for every thousand flights.
Key figures
On time
82.6%
Arrivals under 15 minutes late, of 1,354 completed flights
Avg delay
82 min
Across delayed arrivals only, not all flights
Cancelled
0.80%
National rate is 1.89%
Best carrier
American
83.6% on time across 1,249 flights
These figures cover 1,376 flights between September 2025 and August 2026. The median arrival is 10 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 LAS to MIA
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 | 3 | 100.0% | — | 0.00% | A+ |
| American Airlines | 1,249 | 83.6% | 87 min | 0.80% | B+ |
| Frontier Airlinesthin sample | 93 | 72.0% | 60 min | 0.00% | C+ |
| Spirit Airlinesthin sample | 31 | 70.0% | 38 min | 3.23% | C− |
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.
Best ways to make this trip
The most reliable ways to fly Las Vegas to Miami
Every airline on this route and on the routes between nearby airports, ranked by how often a scheduled flight actually operated and arrived on time. 1 of the top 2 use a different airport at one end.
| Option | Airline | Success | On time | Cancelled | Best departure | Most punctual flight |
|---|---|---|---|---|---|---|
| 1. LAS → MIALas Vegas to Miami | American Airlines | 82.9% | 83.6% | 0.80% | 5am–8am, Tue (route) | — |
| 2. LAS → FLLLas Vegas to Fort Lauderdale | JetBlue Airways | 76.1% | 77.8% | 2.16% | 5am–8am, Tue | B6 1708 11:13 |
Success is the share of scheduled flights that operated and arrived less than 15 minutes late, so a cancelled flight counts against it. “(route)” means the best time comes from every carrier on the route rather than this airline alone.
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 11 points, against half a point between the best and worst carrier.
- 5am–8am272 flights87.8%
- 8am–11am152 flights83.0%
- 11am–2pm382 flights76.5%
- 2pm–5pm16 flights—
- 5pm–8pm—
- 8pm–5am554 flights83.9%
Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.
The weak window here is the middle of the day, not the evening: 11am–2pm runs 76.5% on time against 87.8% for 5am–8am. That shape usually means a departure bank rather than an accumulating delay, so the recovery later in the afternoon is real rather than noise. The 8pm–5am window is the busiest, with 554 flights scheduled in it.
Explore
Filter LAS to MIA 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 LAS to MIA, the best departure window is 5am–8am at 87.8% on time and the worst is 11am–2pm at 76.5%, a wide gap of 11.3 points. All US flights leaving 5am–8am ran 89.3%.
- 5–8am87.8%
- 8–11am83.0%
- 11am–2pm76.5%
- 2–5pm—
- 5–8pm—
- 8pm–5am83.9%
best all US flightsScale 60% to 95%. Cells under 30 flights show a dash.
Across the year
When delays peak on this route
This route's year swings by 17 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.
April is the best month on the calendar at 89.7% on time. Shoulder season thins the schedule and takes the summer weather with it, and the operation gets its margin back. July was the busiest month here, with 151 flights.
Across the week, Tuesday is the strongest day at 88.8% on time and Sunday the weakest at 79.2%, a spread of 10 points.
Delay causes
Why this route gets delayed
Carrier accounts for 54% of the 19,000 delay minutes carriers reported here, and the remaining four split what is left.
- 54%Carrier
- 31%Late-arriving aircraft
- 12%National Airspace System
- 2%Extreme weather
- 0%Security
The largest share of delay minutes, 54%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 11,000 of the 19,000 delay minutes reported here. The split is drawn from 19,458 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 87.8% on time here.
Cancellations are rare at 0.80%, 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
6.6% 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 an hour and a half, which a normal layover absorbs.
At 2,174 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 is a different operation and performs like one: it runs 72.2% on time across 1,379 flights, 10 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 10 points of difference.
The sample behind these figures is 1,376 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 MIA 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. April runs 89.7% on time and March 72.5%, a swing of 17 points. If the dates move at all, move them out of March before you think about anything else. 1,354 completed flights over 12 months sit behind that.
Common questions
LAS to MIA questions
How often is LAS to MIA delayed?
About one flight in six arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 17.4% of the 1,376 flights in this analysis, against 22.7% nationally. Delayed flights are late by an hour and a half on average.
How reliable is LAS to MIA compared with the rest of the country?
82.6% of flights arrive on time here against a national 77.3%, a difference of 5 points in its favour. That is worth a B+ on this site's grading scale.
What time of day has the fewest delays on LAS to MIA?
The 5am–8am departure window is the strongest at 87.8% on time. The 11am–2pm window is the weakest at 76.5%, 11 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 March delays on LAS to MIA?
March is the weakest month at 72.5% on time, compared with 89.7% in April. Across the year that is 17 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
- MIA to LAS — the return legseparate record
- Harry Reid International (LAS) delay statistics
- Miami International (MIA) delay statistics
- LAS to LAX, a related route77.9%
- ATL to MIA, a related route71.2%
- LAS to DEN, a related route76.5%
- Delta Air Lines on-time record100.0%
- American Airlines on-time record83.6%
- Frontier Airlines on-time record72.0%
- The best time of day to fly, according to 7.05 million flight records
- Worst months to fly in the US, ranked by the data
Direction matters. LAS to MIA and MIA to LAS 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.