Route profile
SLC→MIA
Flight reliability, delays and best times to fly from Salt Lake City to Miami, 2,088 miles.
Right now
Aviation weather is not currently a factor.
Aviation weather is not currently a factor.
Route reliability
July 2023 – July 2026
Better than 75% of comparable major US routes (4,598 compared)
Calculated from 2,045 flights. How this is calculated
SLC → MIA arrives on time 81.2% of the time; the return trip, MIA → SLC, arrives on time 74.1% of the time, a 7.1-point gap between the two directions of the same city pair.
SLC → MIA spends 29.9 minutes on the ground on a 2,088-mile trip: 17.9 minutes from pushback to wheels-up at SLC and 12.0 minutes from touchdown to gate at MIA.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
What stands out
This route holds up about the same all year, a steadier seasonal pattern than 92% of 3,357 comparable routes.
86.0% on time in its best month (February) against 75.2% in its worst (January).
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · Ranked against every other route with the same kind of figure and at least 3,357 in the comparison.
What sets this route apart
Where SLC to MIA differs most from similar routes by hour, weekday, month and airline, July 2023 – July 2026.
SLC to MIA is at its best against routes of similar length for flights scheduled at 11 PM: 83.7% arrive on time, 2.9 points ahead of the 80.8% those routes manage at that hour. Against all other routes the gap is 4.6 points.
SLC to MIA holds up on Tuesdays better than routes of similar length do: 86.7% on time to their 82.1%, a 4.6 points lead. Against all other routes the gap is 5.1 points.
May is kinder to SLC to MIA than to routes of similar length: 85.1% on time against 77.1%, 8 points better. Against all other routes the gap is 9.9 points.
Delta Air Lines does better on SLC to MIA than on its routes of similar length: 85.3% on time here, 81.8% there, 3.5 points apart. Against all other routes the gap is 3.8 points.
SLC to MIA against comparable routes
July 2023 – July 2026| Measure | This route | Compared with | Them | Gap | Flights behind it |
|---|---|---|---|---|---|
| Hour: 11 PM departures | 83.7% | routes of similar length | 80.8% | +2.9 pts | 1,409 here, 59,464 there |
| Weekday: Tuesday | 86.7% | routes of similar length | 82.1% | +4.6 pts | 279 here, 131,746 there |
| Month: May | 85.1% | routes of similar length | 77.1% | +8.0 pts | 161 here, 85,293 there |
| Airline: Delta Air Lines | 85.3% | routes of similar length | 81.8% | +3.5 pts | 1,120 here, 251,947 there |
Each comparison pools the flights of other routes, with this route’s own left out. Similar length means within 15% of this route’s 2,088 miles, with at least 5 such routes. A bucket is set against the most comparable group that has enough flights: similar length, then the same origin (at least 3 routes), then all other routes. Hours, weekdays and months appear only where both sides have 120 completed flights, and airlines where both have 600. The gap must be at least 2 points and 2 standard errors, and only the largest gap each way is kept per measure. These are differences in the flights counted, not causes.
When it goes wrong
July 2023 – July 2026
34 min late
against a median of 7 min early
Percentiles over 2,045 operations; cancelled and diverted flights are counted separately.
Will your connection be tight enough?
Layovers at MIA after arriving from SLC.
| Connection time | Chance of missing | Reads as |
|---|---|---|
| 30 min | 34% | Likely to miss |
| 45 min | 18% | High risk |
| 60 min | 11% | Some risk |
| 90 min | 5.5% | Some risk |
| 120 min | 3.0% | Low risk |
This is one leg of a connection. Gate changes and the next flight's own schedule matter too. And a connection can fail before delay is even the question — this route cancels 0.59% of the time and diverts 0.15% of the time, which a late arrival never shows up in.
Chance of missing is the share of 2,030 arrivals on this route that landed later than the connection time less 30 minutes to reach the next gate.
The worst tenth of arrivals on this route land at least 34 minutes late (90th-percentile gate arrival delay), over 2,045 operations.
Any other layover length: connection checker.
Why SLC → MIA runs late
July 2023 – July 2026
crew, maintenance, boarding and fueling, all within the carrier’s control
the inbound aircraft was late, so this flight started late
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
screening or terminal security incidents
Share of the delay minutes US DOT attributed to each cause for SLC → MIA. Only delays of 15 minutes or more are attributed.
Airlines on this route
Carriers with at least 200 flights, by the airline that operated each one.
| Carrier | Flights | On time | Cancelled | Median delay | Severe |
|---|---|---|---|---|---|
| Delta Air Lines | 1,126 | 85.3% | 0.44% | -7 min | 2.9% |
| American Airlines | 919 | 76.2% | 0.76% | -8 min | 8.8% |
Delta Air Lines flew 55.1% of the 2,045 flights listed.
Delta Air Lines arrived on time 9.1 percentage points more often than American Airlines on this route.
Flights on this route
Flight numbers with at least 600 operations here and still on the schedule.
| Flight | Scheduled | Operations | On time |
|---|---|---|---|
| DL2040 Delta Air Lines | 11:40 PM | 784 | 84.4% |
Weekly and seasonal patterns
By day of week
Tuesday is historically the most reliable day and Saturday the least, a gap of 10.8 percentage points.
By month
- Jan: 75.2%
- Feb: 86.0%
- Mar: 75.8%
- Apr: 81.5%
- May: 85.1%
- Jun: 81.8%
- Jul: 76.0%
- Aug to Oct: no data
- Nov: 84.3%
- Dec: 79.5%
January is historically the weakest month and February the strongest, a spread of 10.8 percentage points.
Reliability over time
July 2023 – July 2026
Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 84.8% against 79.8% in the 12 months before — improving by 5.0 percentage points.
Data and methodology
Calculated by FlyerIntel from 2,045 SLC → MIA flight records from the US DOT Bureau of Transportation Statistics, covering July 2023 – July 2026. Late means 15 or more minutes past scheduled arrival; cancelled and diverted flights are left out of on-time rates.
Full methodology · Data sources · Report a problem
Related research: How Long a Layover Needs to Be · Two Airlines on One Route · Best Time of Day to Fly From Major US Airports
Analysis last recomputed