Carrier route record
F9CLT→MIA
Frontier Airlines · Charlotte to Miami
- Flights
- 211
- Period
- July 2025 to June 2026
- Share of route
- 6%
- Carriers
- 3
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Frontier Airlines.
Frontier on CLT to MIA sits in the middle of the pack with a C−. About seven flights in ten arrive on time by the DOT's definition, 7 points worse than the national rate of 77.6%. The late ones land about 2.3 hours behind schedule. That rests on 211 flights, with a median arrival 9 minutes early.
The national on-time rate over the same period is 77.6%, so Frontier on CLT to MIA runs 7 points behind the country as a whole. Across a thousand flights that is about 70 extra late arrivals.
Key figures
On time
70.6%
Arrivals under 15 minutes late, of 201 completed flights
Avg delay
139 min
Across delayed arrivals only, not all flights
Cancelled
4.74%
National rate is 1.81%
Whole route
75.9%
Every carrier on CLT to MIA, 3,720 flights
These figures cover 211 flights between July 2025 and June 2026. Beyond the headline rate, 13.4% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Carrier by carrier
Frontier against every carrier on CLT to MIA
Frontier flew 211 of the 3,720 flights on CLT to MIA, about 6% of it. Its 70.6% on time is 5 points worse than the route as a whole, which runs 75.9%. Ranked by on-time rate it is last of three carriers on the route, where the range runs from American at 76.5% to Frontier at 70.6%. 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 |
|---|---|---|---|---|---|
| American Airlines | 3,244 | 76.5% | 79 min | 1.45% | B |
| Spirit Airlinesthin sample | 265 | 71.6% | 64 min | 5.28% | C− |
| Frontier Airlines (this page)thin sample | 211 | 70.6% | 139 min | 4.74% | C− |
Departure window
When Frontier runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 36 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am8 flights—
- 8am–11am33 flights90.6%
- 11am–2pm22 flights—
- 2pm–5pm50 flights65.3%
- 5pm–8pm46 flights54.5%
- 8pm–5am52 flights70.8%
Scale runs 45% to 95%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is where this operation falls apart: 54.5% on time, against 90.6% for the 8am–11am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 8pm–5am window is the busiest, with 52 flights scheduled in it.
Across the year
Frontier on CLT to MIA through the year
- Jul–Sep 202544 flights78.6%
- Oct–Dec 202547 flights73.3%
- Jan–Mar 202650 flights80.9%
- Apr–Jun 202670 flights56.7%
Scale runs 50% to 85%. Rows with fewer than 30 flights show a dash.
Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 70.6% on time across 211 flights.
Frontier on CLT to MIA did not run the same all year. Its best quarter was Jan–Mar 2026 at 80.9% on time and its weakest Apr–Jun 2026 at 56.7%, a swing of 24 points on roughly 53 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
Across the week, Thursday is the strongest day at 76.2% on time and Monday the weakest at 64.1%. 12 points is a smaller lever than departure hour, but it is free.
Delay causes
Why Frontier runs late on this route
One category carries most of the weight here. Late-arriving aircraft accounts for 73% of the 8,215 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 73%Late-arriving aircraft
- 19%Carrier
- 6%National Airspace System
- 2%Extreme weather
73% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 8,215 reported delay minutes here, that single category outweighs weather by 44 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 8,215 reported delay minutes.
The practical consequence: the 8am–11am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 90.6% on time here.
Cancellations run at 4.74%, against 1.81% nationally. That is about one flight in twenty cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and stage length
What a delay here costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 13.4% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.
The 650 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The return leg is a different operation and performs like one: it runs 85.5% on time across 213 flights, 15 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 15 points of difference.
One caution: this is a thin sample. 211 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 Frontier on CLT to MIA
Put together: the delay figures matter less here than the 4.74% cancellation rate. A late arrival costs you about 2.3 hours; a cancelled flight costs you the day. Book the 8am–11am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 201 completed flights over 12 months sit behind that.
Related
Where to go next
- CLT to MIA, every carrier
- Frontier on MIA to CLT, the return leg
- American Airlines on CLT to MIA76.5%
- Spirit Airlines on CLT to MIA71.6%
- Frontier Airlines network-wide record
- Charlotte Douglas International (CLT) delay statistics
- Miami International (MIA) delay statistics
- The US routes with the most cancellations
- Why the first flight of the morning is statistically safest
Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.