Route reliability record
MCO→ATL
Orlando to Atlanta
- Flights
- 8,226
- Period
- June 2025 to May 2026
- Distance
- 404 mi
- Carriers
- 4
This route sits in the middle of the pack with a C. Close to three flights in four arrive on time by the DOT's definition, 3 points worse than the national rate of 77.4%. The late ones land a little over an hour behind schedule. That rests on 8,226 flights, of which Delta Air Lines flew 5,460 at 77.4% on time.
Delta Air Lines is the most reliable of the four carriers covered here at 77.4% on time across 5,460 flights.
Key figures
On time
74.6%
Arrivals under 15 minutes late, of 8,100 completed flights
Avg delay
81 min
Across delayed arrivals only, not all flights
Cancelled
1.43%
National rate is 1.80%
Best carrier
Delta
77.4% on time across 5,460 flights
These figures cover 8,226 flights between June 2025 and May 2026. Beyond the headline rate, 10.6% 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
Which airline is most reliable on MCO to ATL
The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 77.4% of the time; Spirit Airlines manages 65.8%. Sample sizes sit next to every figure, because a two-point gap across 527 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Delta Air Lines | 5,460 | 77.4% | 89 min | 1.25% | B |
| Southwest Airlines | 1,093 | 71.7% | 59 min | 1.37% | C |
| Frontier Airlines | 1,146 | 68.1% | 78 min | 1.83% | C |
| Spirit Airlines | 527 | 65.8% | 67 min | 2.66% | C |
Delta leads Spirit by 12 points. Real, but small enough that a better departure time on the weaker carrier can outweigh it.
Departure window
The best time of day to leave
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 32 points, against 12 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am1,359 flights91.3%
- 8am–11am1,610 flights84.6%
- 11am–2pm1,464 flights78.6%
- 2pm–5pm1,555 flights68.0%
- 5pm–8pm1,329 flights59.2%
- 8pm–5am909 flights58.9%
Scale runs 50% to 95%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is where this operation falls apart: 58.9% on time, against 91.3% for the 5am–8am 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.
Across the year
When delays peak on this route
This route's year swings by 19 points from best month to worst, which is wide. An annual average tells you very little about the week you are actually flying, so read the strip rather than the headline if your dates are fixed.
June is the worst month at 64.2% on time, 19 points below September, the best at 83.3%. 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.
Across the week, Wednesday is the strongest day at 84.2% on time and Sunday the weakest at 65.5%. 19 points is a smaller lever than departure hour, but it is free.
Delay causes
Why this route gets delayed
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 166,000 reported delay minutes.
- 40%Late-arriving aircraft
- 30%Carrier
- 23%National Airspace System
- 6%Extreme weather
- 0%Security
40% 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 166,000 reported delay minutes here, that single category outweighs weather by 7 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 practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 91.3% on time here.
Cancellations sit at 1.43% against a national 1.80%, which is ordinary. Diversions add another 0.10%.
Connections and stage length
What a delay here actually costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 10.6% of arrivals land a full hour or more behind schedule, against 8.2% 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 5am–8am window matters as much as it does.
The return leg is a different operation and performs like one: it runs 68.9% on time across 8,229 flights, 6 points below 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.
The sample behind these figures is 8,226 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
What to do with this
Booking this route
Put together: the calendar is the biggest lever here, not the carrier or the hour. September runs 83.3% on time and June 64.2%, a swing of 19 points. If the dates move at all, move them out of June before you think about anything else.
Common questions
MCO to ATL questions
How often is MCO to ATL delayed?
About one flight in four arrive at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 25.4% of the 8,226 flights in this analysis, against 22.6% nationally. Delayed flights are late by a little over an hour on average.
Which airline is most reliable on MCO to ATL?
Delta Air Lines leads at 77.4% on time across 5,460 flights. Spirit Airlines is at the other end on 65.8%, a gap of 12 points. Sample size matters as much as the percentage: a rate built from a few hundred flights moves around far more than one built from ten thousand.
What time of day has the fewest delays on MCO to ATL?
The 5am–8am departure window is the strongest at 91.3% on time. The 8pm–5am window is the weakest at 58.9%, 32 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are June delays on MCO to ATL?
June is the weakest month at 64.2% on time, compared with 83.3% in September. Across the year that is 19 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
- ATL to MCO — the return legseparate record
- Orlando International (MCO) delay statistics
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Delta Air Lines on-time record77.4%
- Southwest Airlines on-time record71.7%
- Frontier Airlines on-time record68.1%
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.05 million flight records
Direction matters. MCO to ATL and ATL to MCO are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, June 2025 to May 2026. Updated monthly. How this data is collected.