Best Time to Fly SLC to MIA: On-Time Stats by Hour & Airline
Salt Lake City International → Miami International
Data through July 2026 · Last updated October 18, 2026
796 flights were scheduled from Salt Lake City (SLC) to Miami (MIA) in the last 12 months, and 84.8% of those that flew arrived on time, 7.2 points above the US average of 77.6%.
Among 2 airlines, Delta Air Lines led with 89.5% on time and American Airlines was last with 80.8%.
Over 24 months, Wednesday was the most reliable day (88% on time) and July the worst month (75%).
The cancellation rate was 0.6% (US average 1.8%).
SLC to MIA on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Lines | 89.5% | 57 min | 0.6% | 364 |
| American Airlines | 80.8% | 84 min | 0.7% | 432 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SLC to MIA
On-time arrival % by scheduled departure hour (local time), 1,486 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 12am–1am | 87.1% | 4.6% | 65 |
| 11am–12pm | Limited data | 1 | |
| 12pm–1pm | 73.2% | 0.0% | 56 |
| 1pm–2pm | 70.7% | 0.7% | 142 |
| 2pm–3pm | 77.6% | 0.0% | 67 |
| 9pm–10pm | Limited data | 1 | |
| 10pm–11pm | 93.0% | 0.0% | 115 |
| 11pm–12am | 83.4% | 0.5% | 1,039 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on SLC to MIA
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | Limited data | 26 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 72.2% | -12.5 pts | 0.0% | 90 |
| Summer peak (Jun 15 - Aug 15) | 78.1% | -6.6 pts | 0.8% | 254 |
| All other days | 84.7% | — | 0.6% | 1,116 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).