Miami (MIA) to Salt Lake City (SLC): On-Time Performance
Data through July 2026
Miami (MIA) to Salt Lake City (SLC) effectively runs on two schedules. In October 2024, 90% of arrivals were on time; in July 2025 that fell to 55% — a 35-point seasonal swing. Across the full period the route averages 75% on-time against a national 78%. Morning departures also hold up better than evening ones (86% vs 70%), which matters most in the rough months.
- On-time
- 75%
- arrived <15 min late
- Avg delay
- 18 min
- completed flights
- Cancelled
- 0.8%
- Flights/day
- 2.2
- last 12 months
- Duration
- 5h 20m
- scheduled
- Distance
- 2,088 mi
Best airline from MIA to SLC
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| American Airlinesmost reliable | 76% | 17 min | 0.9% | 757 |
| Delta Air Lines | 74% | 19 min | 0.7% | 760 |
Monthly on-time trend
Best time to fly from MIA to SLC
Aim for departures around 7 a.m. (94% on-time); avoid 8 p.m. departures (66%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 70% | 21 min |
| Tuesdaybest | 86% | 9 min |
| Wednesday | 79% | 10 min |
| Thursday | 78% | 16 min |
| Friday | 76% | 14 min |
| Saturday | 71% | 23 min |
| Sunday | 67% | 31 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft32%
- Airline operations48%
- National airspace system16%
- Weather3%
Frequently asked questions
- How often are flights from MIA to SLC delayed?
- 25% of MIA–SLC 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 18 minutes.
- Which airline is most reliable from MIA to SLC?
- American Airlines has the best on-time record on this route at 76%, based on 757 flights. 2 airlines flew MIA–SLC frequently enough to compare in this period.
- What is the best time of day to fly from MIA to SLC?
- Departures around 7 a.m. have the best record (94% on-time), while departures around 8 p.m. have the worst (66%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from MIA to SLC?
- The scheduled MIA–SLC flight time averages 5h 20m over 2,088 miles. Actual arrival times vary — flights on this route land 15+ minutes late 25% of the time.
- How often are MIA to SLC flights cancelled?
- 0.8% 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 SLC?
- July 2025 was the roughest month in this dataset, with only 55% of arrivals on time. The best was October 2024 at 90%. If your dates are flexible, that 35-point gap is worth planning around.
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Based on 1,517 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.