Route reliability record
ORD→MCO
Chicago to Orlando
- Flights
- 6,419
- Period
- June 2025 to May 2026
- Distance
- 1,005 mi
- Carriers
- 5
This route sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 5 points worse than the national rate of 77.4%. The late ones land a little over an hour behind schedule. That rests on 6,419 flights, of which United Airlines flew 2,426 at 79.2% on time.
United Airlines is the most reliable of the four carriers covered here at 79.2% on time across 2,426 flights.
Key figures
On time
72.5%
Arrivals under 15 minutes late, of 6,295 completed flights
Avg delay
74 min
Across delayed arrivals only, not all flights
Cancelled
1.53%
National rate is 1.80%
Best carrier
United
79.2% on time across 2,426 flights
These figures cover 6,419 flights between June 2025 and May 2026. Beyond the headline rate, 10.7% 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 ORD to MCO
The choice of carrier is not cosmetic here. United Airlines arrives on time 79.2% of the time; American Airlines manages 64.4%. Sample sizes sit next to every figure, because a two-point gap across 2,140 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| United Airlines | 2,426 | 79.2% | 70 min | 0.66% | B+ |
| Southwest Airlines | 856 | 73.8% | 65 min | 1.17% | C |
| Spirit Airlines | 638 | 73.2% | 79 min | 2.82% | C |
| Frontier Airlinesthin sample | 359 | 70.7% | 99 min | 1.95% | C |
| American Airlines | 2,140 | 64.4% | 76 min | 2.20% | D |
The spread between United and American is 15 points, wide enough that it should decide the booking. On a hundred trips that is 15 more arrivals inside the on-time window.
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 25 points, against 15 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am1,384 flights87.2%
- 8am–11am1,202 flights75.9%
- 11am–2pm1,207 flights69.4%
- 2pm–5pm1,295 flights66.0%
- 5pm–8pm1,192 flights62.6%
- 8pm–5am139 flights67.9%
Scale runs 55% to 95%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is where this operation falls apart: 62.6% on time, against 87.2% 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 22 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.
July is the worst month at 63.6% on time, 22 points below September, the best at 86.1%. 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, Tuesday is the strongest day at 78.9% on time and Sunday the weakest at 66.6%. 12 points is a smaller lever than departure hour, but it is free.
Delay causes
Why this route gets delayed
One category carries most of the weight here. Late-arriving aircraft accounts for 45% of the 129,000 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.
- 45%Late-arriving aircraft
- 26%Carrier
- 24%National Airspace System
- 5%Extreme weather
- 0%Security
45% 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 129,000 reported delay minutes here, that single category outweighs weather by 9 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 87.2% on time here.
Cancellations sit at 1.53% against a national 1.80%, which is ordinary. Diversions add another 0.41%.
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. 10.7% 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.
The 1,005 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 runs 70.5% on time across 6,422 flights, within 2 points of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
The sample behind these figures is 6,419 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 86.1% on time and July 63.6%, a swing of 22 points. If the dates move at all, move them out of July before you think about anything else.
Common questions
ORD to MCO questions
How often is ORD to MCO delayed?
Roughly 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 27.5% of the 6,419 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 ORD to MCO?
United Airlines leads at 79.2% on time across 2,426 flights. American Airlines is at the other end on 64.4%, a gap of 15 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 ORD to MCO?
The 5am–8am departure window is the strongest at 87.2% on time. The 5pm–8pm window is the weakest at 62.6%, 25 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 July delays on ORD to MCO?
July is the weakest month at 63.6% on time, compared with 86.1% in September. Across the year that is 22 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
- MCO to ORD — the return legseparate record
- Chicago O'Hare International (ORD) delay statistics
- Orlando International (MCO) delay statistics
- United Airlines on-time record79.2%
- Southwest Airlines on-time record73.8%
- Spirit Airlines on-time record73.2%
- 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. ORD to MCO and MCO to ORD 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.