Route reliability record

ORD→MCO

Chicago to Orlando

Flights: 6,347
Period: July 2025 to June 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 77.6%. The late ones land a little over an hour behind schedule. That rests on 6,347 flights, of which United Airlines flew 2,459 at 78.7% on time.

United Airlines is the most reliable of the five carriers covered here at 78.7% on time across 2,459 flights.

On time

72.2%

Arrivals under 15 minutes late, of 6,216 completed flights

Avg delay

76 min

Across delayed arrivals only, not all flights

Cancelled

1.56%

National rate is 1.81%

Best carrier

United

78.7% on time across 2,459 flights

These figures cover 6,347 flights between July 2025 and June 2026. Beyond the headline rate, 10.9% 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 78.7% of the time; American Airlines manages 64.5%. Sample sizes sit next to every figure, because a two-point gap across 2,140 flights means less than a ten-point one.

On-time performance by carrier on ORD to MCO
Airline	Flights	On time	Avg delay	Cancelled	Grade
United Airlines	2,459	78.7%	70 min	0.61%	B+
Southwest Airlines	801	73.9%	66 min	1.12%	C
Spirit Airlines	582	71.6%	80 min	3.09%	C−
Frontier Airlines	365	69.5%	97 min	2.19%	C
American Airlines	2,140	64.5%	79 min	2.29%	D

Spirit Airlines cancels 3.1% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after 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 26 points, against 14 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am1,347 flights86.9%
8am–11am1,157 flights75.1%
11am–2pm1,201 flights69.9%
2pm–5pm1,263 flights67.2%
5pm–8pm1,240 flights60.9%
8pm–5am139 flights67.9%

Scale runs 50% to 90%. Rows with fewer than 30 flights show a dash.

The 5pm–8pm window is where this operation falls apart: 60.9% on time, against 86.9% 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. The 5am–8am window is the busiest, with 1,347 flights scheduled in it.

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.

Darker means more delays. Figures are on-time percentages.September best, July worst

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. March was the busiest month here, with 688 flights.

Across the week, Tuesday is the strongest day at 77.8% on time and Sunday the weakest at 66.0%. 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 47% of the 131,000 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.

Late-arriving aircraft
47%
Carrier
25%
National Airspace System
24%
Extreme weather
4%
Security
0%

47% 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 131,000 reported delay minutes here, that single category outweighs weather by 11 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 131,232 reported delay minutes.

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 86.9% on time here.

Cancellations sit at 1.56% against a national 1.81%, which is ordinary. Diversions add another 0.50%.

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. 10.9% 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 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 70.6% on time across 6,350 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 6,347 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. 6,216 completed flights over 12 months sit behind that.

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 27.8% of the 6,347 flights in this analysis, against 22.4% 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 78.7% on time across 2,459 flights. American Airlines is at the other end on 64.5%, a gap of 14 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 86.9% on time. The 5pm–8pm window is the weakest at 60.9%, 26 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.

Where to go next

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, July 2025 to June 2026. Updated monthly. How this data is collected.

Key figures