Flight number record
UA 1643
United Airlines · Orlando to Newark
- Route
- MCO → EWR
- Departs
- 14:37
- Flights
- 252
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 1643, check with United Airlines.
UA 1643 sits in the middle of the pack with a C−. About seven flights in ten arrive on time by the DOT's definition, 6 points worse than the national rate of 77.3%. The late ones land close to two hours behind schedule. That rests on 252 flights, with a median arrival 6 minutes early.
The national on-time rate over the same period is 77.3%, so UA 1643 runs 6 points behind the country as a whole. Across a thousand flights that is about 62 extra late arrivals.
Key figures
On time
71.1%
Arrivals under 15 minutes late, of 239 completed flights
Avg delay
113 min
Across delayed arrivals only, not all flights
Cancelled
4.37%
National rate is 1.89%
1 hour+ late
16.3%
National rate is 8.3%
These figures cover 252 flights between September 2025 and August 2026. Beyond the headline rate, 16.3% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When UA 1643 flies
UA 1643 flies MCO to EWR without a single fixed slot. Its most common scheduled departure was 14:37, used on 46 of 252 flights, with 14:16 (42 flights) and 14:05 (34 flights) next.
- Departs 14:3746 flights18.3%
- Departs 14:1642 flights16.7%
- Departs 14:0534 flights13.5%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 14:37 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and UA 1643 runs level with that at 71.1%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
UA 1643 next to MCO to EWR
Every carrier on MCO to EWR combined arrived on time 75.0% of the time across 6,389 flights, so UA 1643 is 4 points behind it. United flew 4,019 flights on the same city pair under all its flight numbers, including this one, and those ran 78.6% on time. Across its whole network United Airlines managed 78.8%, which this flight trails by 8 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 1643thin sample | 252 | 71.1% | 113 min | 4.37% | C− |
| All United Airlines on MCO–EWR | 4,019 | 78.6% | 95 min | 2.36% | B |
| All carriers on MCO–EWR | 6,389 | 75.0% | 89 min | 3.29% | B− |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 1643 quarter by quarter
UA 1643 did not run the same all year. Its best quarter was Apr–Jun 2026 at 78.7% on time and its weakest Jul–Sep 2026 at 61.8%, a swing of 17 points on roughly 63 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Oct–Dec 202566 flights67.2%
- Jan–Mar 202663 flights76.3%
- Apr–Jun 202661 flights78.7%
- Jul–Sep 202662 flights61.8%
Scale runs 55% to 85%.
By weekday, UA 1643 did best on Wednesday at 85.7% on time and worst on Monday at 58.3%. Each day rests on about 36 flights, so a gap of 27 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 1643 runs when it is late
UA 1643 often beats the schedule: 63 of 239 completed flights, 26%, arrived 15 minutes or more early. When UA 1643 is late it tends to be very late: 39 of its 69 late arrivals were an hour or more behind, and 19 were two hours or more.
- 15+ min early63 flights26.4%
- Within 15 min107 flights44.8%
- 15–29 min late13 flights5.4%
- 30–59 min late17 flights7.1%
- 1–2 hours late20 flights8.4%
- 2+ hours late19 flights7.9%
Scale runs 0% to 100%.
Share of 239 completed flights by arrival against schedule.
10 of 67 late departures made up the time and arrived on time, 15% of them. In the other direction, 12 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at EWR.
The worst days
Worst days for UA 1643
The latest arrival of the period was on 9 November 2025, 8 hours 22 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On three of the five worst days the largest share was filed as national airspace system delay.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 9 November 2025 | 8 hours 22 minutes | Late-arriving aircraft |
| 20 August 2026 | 7 hours 22 minutes | National Airspace System |
| 22 June 2026 | 7 hours 18 minutes | National Airspace System |
| 30 October 2025 | 7 hours 11 minutes | Late-arriving aircraft |
| 8 November 2025 | 6 hours 43 minutes | National Airspace System |
Delay causes
Why UA 1643 runs late
National Airspace System accounts for 53% of the 7,821 delay minutes carriers reported here, and the remaining four split what is left.
- 53%National Airspace System
- 36%Late-arriving aircraft
- 8%Carrier
- 3%Extreme weather
36% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 7,821 reported delay minutes here, that single category outweighs weather by 11 to one. The split is drawn from 7,821 delay minutes reported on UA 1643.
Cancellations run at 4.37%, against 1.89% nationally. That is roughly one flight in 25 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and routes
What a delay on this flight costs
16.3% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
The 937 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.
The same number turns up on six other city pairs in the data, including ORD to MCO (156), BDL to ORD (31) and IAD to PBI (24), but none flew often enough under UA 1643 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to MCO to EWR only.
One caution: this is a thin sample. 252 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.
What to do with this
Booking UA 1643
For a booking, the cancellation rate is the figure to plan around on UA 1643: 4.37% of its 252 scheduled flights did not operate. A late arrival costs close to two hours, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- MCO to EWR, every carrier and departure
- EWR to MCO, the return direction
- JetBlue Airways 128 on the same route67.5%
- JetBlue Airways 2028 on the same route82.9%
- Orlando International (MCO) delay statistics
- Newark Liberty International (EWR) delay statistics
- United Airlines on-time record
- Every United Airlines flight number with a record
- The most and least reliable flight numbers in the US
- Why the first flight of the morning is statistically safest
A flight number here means United Airlines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.