Carrier route record
UAMCO→ORD
United Airlines · Orlando to Chicago
- Flights
- 2,459
- Period
- July 2025 to June 2026
- Share of route
- 39%
- Carriers
- 5
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with United Airlines.
United on MCO to ORD sits in the middle of the pack with a B+. Close to three flights in four arrive on time by the DOT's definition, 2 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 2,459 flights. The strongest carrier on the route with a full sample, Frontier Airlines, flew 366 at 72.0% on time.
The US average over the same twelve months is 77.6%, so there is little to separate United on MCO to ORD from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
75.6%
Arrivals under 15 minutes late, of 2,417 completed flights
Avg delay
81 min
Across delayed arrivals only, not all flights
Cancelled
0.85%
National rate is 1.81%
Whole route
70.6%
Every carrier on MCO to ORD, 6,350 flights
These figures cover 2,459 flights between July 2025 and June 2026. Beyond the headline rate, 8.2% 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
United against every carrier on MCO to ORD
United flew 2,459 of the 6,350 flights on MCO to ORD, about 39% of it. Its 75.6% on time is 5 points better than the route as a whole, which runs 70.6%. Ranked by on-time rate it is first of five carriers on the route, where the range runs from United at 75.6% to Spirit at 60.0%.
The choice of carrier is not cosmetic here. Frontier Airlines arrives on time 72.0% of the time; Spirit Airlines manages 60.0%. Sample sizes sit next to every figure, because a two-point gap across 583 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| United Airlines (this page) | 2,459 | 75.6% | 81 min | 0.85% | B+ |
| Frontier Airlines | 366 | 72.0% | 97 min | 2.46% | C |
| American Airlines | 2,142 | 68.9% | 86 min | 2.19% | C |
| Southwest Airlines | 800 | 66.8% | 60 min | 1.38% | C |
| Spirit Airlines | 583 | 60.0% | 74 min | 4.12% | D− |
Spirit Airlines cancels 4.1% 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.
Flight by flight
United flight numbers on MCO to ORD
Departure window
When United runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 25 points, against 12 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am255 flights87.0%
- 8am–11am496 flights86.4%
- 11am–2pm561 flights85.3%
- 2pm–5pm800 flights62.4%
- 5pm–8pm305 flights64.4%
- 8pm–5am42 flights77.5%
Scale runs 55% to 90%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 87.0% of the time, against 62.4% for the afternoon window. That is 25 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 2pm–5pm window is the busiest, with 800 flights scheduled in it.
Across the year
United on MCO to ORD through the year
September is the best month on the calendar at 87.9% on time. Shoulder season thins the schedule and takes the summer weather with it, and the operation gets its margin back. March was the busiest month here, with 269 flights.
Across the week, Wednesday is the strongest day at 81.2% on time and Sunday the weakest at 69.4%. 12 points is a smaller lever than departure hour, but it is free.
Delay causes
Why United runs late on this route
One category carries most of the weight here. National Airspace System accounts for 47% of the 48,000 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.
- 47%National Airspace System
- 30%Late-arriving aircraft
- 19%Carrier
- 4%Extreme weather
47% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 22,000 minutes out of 48,000, against a national NAS share of 21%. The split is drawn from 47,559 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 87.0% on time here.
Cancellations are rare at 0.85%, below the national 1.81% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and stage length
What a delay here costs
8.2% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.
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 is a different operation and performs like one: it runs 78.7% on time across 2,459 flights, 3 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 3 points of difference.
The sample behind these figures is 2,459 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 United on MCO to ORD
Put together: the calendar is the biggest lever here, not the carrier or the hour. September runs 87.9% on time and March 65.1%, a swing of 23 points. If the dates move at all, move them out of March before you think about anything else. 2,417 completed flights over 12 months sit behind that.
Related
Where to go next
- MCO to ORD, every carrier
- United on ORD to MCO, the return leg
- Frontier Airlines on MCO to ORD72.0%
- American Airlines on MCO to ORD68.9%
- Southwest Airlines on MCO to ORD66.8%
- Spirit Airlines on MCO to ORD60.0%
- United Airlines network-wide record
- Orlando International (MCO) delay statistics
- Chicago O'Hare International (ORD) delay statistics
- Same route, different airline: where the carrier you pick matters most
- The best time of day to fly, according to 7.04 million flight records
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.