NKMCO→ATL

Spirit flew 471 of the 8,207 flights on MCO to ATL, about 6% of it. Its 64.5% on time is 11 points worse than the route as a whole, which runs 75.6%. Ranked by on-time rate it is last of four carriers on the route, where the range runs from Delta at 79.1% to Spirit at 64.5%.

The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 79.1% of the time; Frontier Airlines manages 67.7%. Sample sizes sit next to every figure, because a two-point gap across 1,180 flights means less than a ten-point one.

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.

At 404 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 2pm–5pm window matters as much as it does.

The return leg is a different operation and performs like one: it runs 71.5% on time across 470 flights, 7 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 7 points of difference.

One caution: this is a thin sample. 471 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.