Miami (MIA) to Las Vegas (LAS): On-Time Performance
Data through July 2026
Miami (MIA) to Las Vegas (LAS) effectively runs on two schedules. In April 2025, 85% of arrivals were on time; in July 2024 that fell to 50% — a 35-point seasonal swing. Across the full period the route averages 72% on-time against a national 78%. Morning departures also hold up better than evening ones (86% vs 66%), which matters most in the rough months.
- On-time
- 72%
- arrived <15 min late
- Avg delay
- 20 min
- completed flights
- Cancelled
- 0.9%
- Flights/day
- 3.9
- last 12 months
- Duration
- 5h 24m
- scheduled
- Distance
- 2,174 mi
Best airline from MIA to LAS
3 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Frontier Airlinesmost reliable | 73% | 22 min | 1.5% | 133 |
| American Airlines | 72% | 20 min | 0.7% | 2,756 |
| Spirit Airlines | 71% | 22 min | 2.2% | 417 |
Monthly on-time trend
Best time to fly from MIA to LAS
Aim for departures around 8 a.m. (89% on-time); avoid 10 p.m. departures (49%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 70% | 23 min |
| Tuesdaybest | 77% | 16 min |
| Wednesday | 73% | 18 min |
| Thursday | 68% | 21 min |
| Friday | 72% | 19 min |
| Saturday | 76% | 15 min |
| Sunday | 64% | 27 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft35%
- Airline operations36%
- National airspace system24%
- Weather5%
- Security1%
Frequently asked questions
- How often are flights from MIA to LAS delayed?
- 29% of MIA–LAS flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 20 minutes.
- Which airline is most reliable from MIA to LAS?
- Frontier Airlines has the best on-time record on this route at 73%, based on 133 flights. 3 airlines flew MIA–LAS frequently enough to compare in this period.
- What is the best time of day to fly from MIA to LAS?
- Departures around 8 a.m. have the best record (89% on-time), while departures around 10 p.m. have the worst (49%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from MIA to LAS?
- The scheduled MIA–LAS flight time averages 5h 24m over 2,174 miles. Actual arrival times vary — flights on this route land 15+ minutes late 29% of the time.
- How often are MIA to LAS flights cancelled?
- 0.9% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from MIA to LAS?
- July 2024 was the roughest month in this dataset, with only 50% of arrivals on time. The best was April 2025 at 85%. If your dates are flexible, that 35-point gap is worth planning around.
Explore related pages
More routes from MIA
Other ways to fly to Las Vegas (LAS)
Related guides
Based on 3,312 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.