Salt Lake City (SLC) to Miami (MIA): On-Time Performance
Data through May 2026
When you fly SLC to MIA matters as much as anything else about the booking: the route swung from 97% on-time in October 2024 to just 68% in December 2024. Across the full period the route averages 82% on-time against a national 78%.
- On-time
- 82%
- arrived <15 min late
- Avg delay
- 12 min
- completed flights
- Cancelled
- 0.9%
- Flights/day
- 2.1
- last 12 months
- Duration
- 4h 37m
- scheduled
- Distance
- 2,088 mi
Best airline from SLC to MIA
2 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Linesmost reliable | 84% | 10 min | 0.7% | 729 |
| American Airlines | 80% | 14 min | 1.1% | 655 |
Monthly on-time trend
Best time to fly from SLC to MIA
Aim for departures around 10 p.m. (93% on-time); avoid 1 p.m. departures (69%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 81% | 9 min |
| Tuesdaybest | 88% | 6 min |
| Wednesday | 87% | 9 min |
| Thursday | 83% | 13 min |
| Friday | 82% | 12 min |
| Saturday | 77% | 18 min |
| Sunday | 79% | 13 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft40%
- Airline operations42%
- National airspace system17%
- Security1%
Frequently asked questions
- How often are flights from SLC to MIA delayed?
- 18% of SLC–MIA flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 12 minutes.
- Which airline is most reliable from SLC to MIA?
- Delta Air Lines has the best on-time record on this route at 84%, based on 729 flights. 2 airlines flew SLC–MIA frequently enough to compare in this period.
- What is the best time of day to fly from SLC to MIA?
- Departures around 10 p.m. have the best record (93% on-time), while departures around 1 p.m. have the worst (69%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from SLC to MIA?
- The scheduled SLC–MIA flight time averages 4h 37m over 2,088 miles. Actual arrival times vary — flights on this route land 15+ minutes late 18% of the time.
- How often are SLC to MIA flights cancelled?
- 0.9% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from SLC to MIA?
- December 2024 was the roughest month in this dataset, with only 68% of arrivals on time. The best was October 2024 at 97%. If your dates are flexible, that 29-point gap is worth planning around.
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Based on 1,384 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.