Route profile
MIA→CHS
Flight reliability, delays and best times to fly from Miami to Charleston, 489 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 10% of comparable major US routes (4,598 compared)
Calculated from 2,708 flights. How this is calculated · What counts as on time
MIA → CHS arrives on time 69.8% of the time; the return trip, CHS → MIA, arrives on time 79.3% of the time, a 9.5-point gap between the two directions of the same city pair.
MIA → CHS spends 27.8 minutes on the ground on a 489-mile trip: 20.1 minutes from pushback to wheels-up at MIA and 7.7 minutes from touchdown to gate at CHS.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
What stands out
Which day you fly matters unusually much here, a wider weekday spread than 99% of 4,467 comparable routes.
78.7% on time on a typical Tuesday, against 58.4% on a Sunday.
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 4,467 in the comparison.
What sets this route apart
Where MIA to CHS differs most from similar routes by hour, weekday, month and airline, July 2023 – July 2026.
MIA to CHS struggles most at 10 PM: 59.9% of its flights scheduled then arrive on time, 9 points behind the 68.9% on routes of similar length at the same hour. Against all other routes the gap is 11.8 points.
MIA to CHS is at its best against routes of similar length for flights scheduled at 9 PM: 73.9% arrive on time, 5.4 points ahead of the 68.5% those routes manage at that hour.
Sunday is the day MIA to CHS slips furthest against routes of similar length, 58.4% on time where they average 75.5%, 17.1 points lower. Against all other routes the gap is 16.4 points.
In March, MIA to CHS runs 17.4 points below routes of similar length, 61.9% on time to 79.3%. Against all other routes the gap is 16 points.
American Airlines’ flights on MIA to CHS arrive on time 66.6% of the time, 8.1 points below the 74.7% it manages on its routes of similar length. Against all other routes the gap is 8.5 points.
MIA to CHS against comparable routes
July 2023 – July 2026| Measure | This route | Compared with | Them | Gap | Flights behind it |
|---|---|---|---|---|---|
| Hour: 10 PM departures | 59.9% | routes of similar length | 68.9% | −9.0 pts | 685 here, 28,700 there |
| Hour: 9 PM departures | 73.9% | routes of similar length | 68.5% | +5.4 pts | 395 here, 51,209 there |
| Weekday: Sunday | 58.4% | routes of similar length | 75.5% | −17.1 pts | 382 here, 211,752 there |
| Month: March | 61.9% | routes of similar length | 79.3% | −17.4 pts | 210 here, 114,740 there |
| Airline: American Airlines | 66.6% | routes of similar length | 74.7% | −8.1 pts | 2,040 here, 228,629 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 489 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
66 min late
against a median of 2 min early
MIA → CHS has an average that understates its risk: a typical arrival is 2 min early, but the worst tenth are 68 minutes worse than that. If the trip has something unmissable at the end of it, the median is the wrong number to plan against.
Percentiles over 2,708 operations; cancelled and diverted flights are counted separately.
Will your connection be tight enough?
Layovers at CHS after arriving from MIA.
| Connection time | Chance of missing | Reads as |
|---|---|---|
| 30 min | 45% | Likely to miss |
| 45 min | 29% | High risk |
| 60 min | 20% | High risk |
| 90 min | 11% | Some risk |
| 120 min | 7.3% | Some 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 1.55% 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 2,662 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 66 minutes late (90th-percentile gate arrival delay), over 2,708 operations.
Any other layover length: connection checker.
Best time to fly
MIA → CHS flights departing 5–9 AM arrived on time 86.9% of the time, against 65.1% for 9 PM–5 AM departures, a gap of 21.8 percentage points.
By departure window
By departure hour
- 12 AM to 6 AM: too few flights to score
- 7 AM: 87.2% on time from 142 flights
- 8 AM: 86.7% on time from 283 flights
- 9 AM to 2 PM: too few flights to score
- 3 PM: 71.6% on time from 198 flights
- 4 PM: 66.5% on time from 197 flights
- 5 PM: 62.5% on time from 594 flights
- 6 PM to 8 PM: too few flights to score
- 9 PM: 73.9% on time from 399 flights
- 10 PM: 59.9% on time from 701 flights
- 11 PM: too few flights to score
Departure windows with fewer than 120 flights are not scored.
Why MIA → CHS runs late
July 2023 – July 2026
the inbound aircraft was late, so this flight started late
crew, maintenance, boarding and fueling, all within the carrier’s control
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 MIA → CHS. Only delays of 15 minutes or more are attributed. What the five causes mean
Late-arriving aircraft is the largest cause on MIA → CHS, at 50.8%: flights here mostly leave late because the plane came in late, and the day shows it: 5–9 AM departures arrived on time 86.9% of the time and 9 PM–5 AM departures 65.1%.
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 |
|---|---|---|---|---|---|
| American Airlines | 2,077 | 66.6% | 1.59% | 0 min | 12.7% |
| Envoy Air | 607 | 80.0% | 1.15% | -7 min | 6.0% |
American Airlines flew 77.4% of the 2,684 flights listed.
Envoy Air arrived on time 13.4 percentage points more often than American Airlines on this route.
Weekly and seasonal patterns
By day of week
Tuesday is historically the most reliable day and Sunday the least, a gap of 20.3 percentage points.
By month
- Jan: 76.3%
- Feb: 67.0%
- Mar: 61.9%
- Apr: 74.7%
- May: 66.9%
- Jun: 62.7%
- Jul: 56.6%
- Aug: 64.3%
- Sep: 80.7%
- Oct: 82.3%
- Nov: 79.6%
- Dec: 71.8%
July is historically the weakest month and October the strongest, a spread of 25.7 percentage points.
Reliability over time
July 2023 – July 2026
Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 68.6% against 71.0% in the 12 months before — declining by 2.4 percentage points.
Data and methodology
Calculated by FlyerIntel from 2,708 MIA → CHS 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