Carrier route record
AAMIA→SLC
American Airlines · Miami to Salt Lake City
- Flights
- 454
- Period
- September 2025 to August 2026
- Share of route
- 56%
- Carriers
- 2
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with American Airlines.
American on MIA to SLC sits in the middle of the pack with a B+. Close to three flights in four arrive on time by the DOT's definition, 2 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 454 flights, with a median arrival 8 minutes early.
The US average over the same twelve months is 77.3%, so there is little to separate American on MIA to SLC from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
75.1%
Arrivals under 15 minutes late, of 450 completed flights
Avg delay
70 min
Across delayed arrivals only, not all flights
Cancelled
0.66%
National rate is 1.89%
Whole route
77.3%
Every carrier on MIA to SLC, 818 flights
These figures cover 454 flights between September 2025 and August 2026. Beyond the headline rate, 9.6% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
American against every carrier on MIA to SLC
American flew 454 of the 818 flights on MIA to SLC, most of the route. Its 75.1% on time is 2 points worse than the route as a whole, which runs 77.3%. Ranked by on-time rate it is last of two carriers on the route, where the range runs from Delta at 80.1% to American at 75.1%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
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 | 364 | 80.1% | 65 min | 0.55% | B+ |
| American Airlines (this page) | 454 | 75.1% | 70 min | 0.66% | B+ |
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.
Departure window
When American runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 15 points, against half a point between the best and worst carrier.
- 5am–8am—
- 8am–11am162 flights84.4%
- 11am–2pm—
- 2pm–5pm—
- 5pm–8pm124 flights70.5%
- 8pm–5am168 flights69.6%
Scale runs 60% to 90%. Rows with fewer than 30 flights show a dash.
Book the morning departure. Flights leaving between 8am–11am arrive on time 84.4% of the time, against 69.6% for the overnight window. That is 15 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8pm–5am window is the busiest, with 168 flights scheduled in it.
Across the year
American on MIA to SLC through the year
July is the worst month at 49.0% on time, 35 points below December, the best at 84.1%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. January was the busiest month here, with 62 flights.
Across the week, Wednesday is the strongest day at 89.3% on time and Saturday the weakest at 64.7%, a spread of 25 points.
Arrival by arrival
How late American on MIA to SLC runs when it is late
American on MIA to SLC often beats the schedule: 159 of 450 completed flights, 35%, arrived 15 minutes or more early. The 112 late arrivals split 32 under half an hour, 37 between 30 and 60 minutes, and 43 an hour or more.
- 15+ min early159 flights35.3%
- Within 15 min179 flights39.8%
- 15–29 min late32 flights7.1%
- 30–59 min late37 flights8.2%
- 1–2 hours late26 flights5.8%
- 2+ hours late17 flights3.8%
Scale runs 0% to 100%.
Share of 450 completed flights by arrival against schedule.
33 of 126 late departures made up the time and arrived on time, 26% of them. 19 flights left on time and still arrived late.
The worst days
Worst days for American on MIA to SLC
The latest arrival of the period was on 1 June 2026, 8 hours 56 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 1 June 2026 | 8 hours 56 minutes | Carrier |
| 22 January 2026 | 4 hours 3 minutes | Carrier |
| 21 March 2026 | 3 hours 51 minutes | Carrier |
| 1 August 2026 | 3 hours 49 minutes | Carrier |
| 26 July 2026 | 3 hours 42 minutes | Late-arriving aircraft |
Delay causes
Why American runs late on this route
Carrier accounts for 47% of the 7,809 delay minutes carriers reported here, and the remaining four split what is left.
- 47%Carrier
- 35%Late-arriving aircraft
- 15%National Airspace System
- 3%Extreme weather
- 0%Security
35% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 7,809 reported delay minutes here, that single category outweighs weather by 13 to one. The split is drawn from 7,809 reported delay minutes.
The largest share of delay minutes, 47%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 3,632 of the 7,809 delay minutes reported here.
Cancellations are rare at 0.66%, 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 costs
9.6% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
At 2,088 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 81.1% on time across 454 flights, 6 points above 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 6 points of difference.
One caution: this is a thin sample. 454 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking American on MIA to SLC
Put together: treat all of this as provisional. 454 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 75.1% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 450 completed flights over 12 months sit behind that.
Related
Where to go next
- MIA to SLC, every carrier
- American on SLC to MIA, the return leg
- Delta Air Lines on MIA to SLC80.1%
- American Airlines network-wide record
- Miami International (MIA) delay statistics
- Salt Lake City International (SLC) delay statistics
- Why the first flight of the morning is statistically safest
- How often a connection fails at the major US hubs
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.