Flight number record
UA 2443
United Airlines · Chicago to Jacksonville
- Route
- ORD → JAX
- Departs
- 18:19
- Flights
- 261
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 2443, check with United Airlines.
UA 2443 draws a C+. About one flight in three arrives at least 15 minutes late, and the typical late arrival is a little over an hour behind schedule. Build slack into anything you connect to. That rests on 261 flights, with a median arrival 1 minute late.
The national on-time rate over the same period is 77.3%, so UA 2443 runs 12 points behind the country as a whole. Across a thousand flights that is about 115 extra late arrivals.
Key figures
On time
65.8%
Arrivals under 15 minutes late, of 260 completed flights
Avg delay
80 min
Across delayed arrivals only, not all flights
Cancelled
0.38%
National rate is 1.89%
1 hour+ late
12.3%
National rate is 8.3%
These figures cover 261 flights between September 2025 and August 2026. Beyond the headline rate, 12.3% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When UA 2443 flies
UA 2443 flies ORD to JAX without a single fixed slot. Its most common scheduled departure was 18:19, used on 81 of 261 flights, with 18:06 (37 flights) and 16:00 (32 flights) next.
- Departs 18:1981 flights31.0%
- Departs 18:0637 flights14.2%
- Departs 16:0032 flights12.3%
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 18:19 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and UA 2443 runs 2 points worse at 65.8%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
UA 2443 next to ORD to JAX
Every carrier on ORD to JAX combined arrived on time 73.2% of the time across 2,172 flights, so UA 2443 is 7 points behind it. United flew 895 flights on the same city pair under all its flight numbers, including this one, and those ran 75.0% on time. Across its whole network United Airlines managed 78.8%, which this flight trails by 13 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 2443thin sample | 261 | 65.8% | 80 min | 0.38% | C+ |
| All United Airlines on ORD–JAX | 895 | 75.0% | 83 min | 0.45% | B+ |
| All carriers on ORD–JAX | 2,172 | 73.2% | 78 min | 1.29% | C |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 2443 quarter by quarter
UA 2443 did not run the same all year. Its best quarter was Oct–Dec 2025 at 75.4% on time and its weakest Jul–Sep 2026 at 53.8%, a swing of 22 points on roughly 65 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 202561 flights75.4%
- Jan–Mar 202690 flights63.3%
- Apr–Jun 202670 flights67.1%
- Jul–Sep 202640 flights53.8%
Scale runs 45% to 80%.
By weekday, UA 2443 did best on Monday at 74.4% on time and worst on Sunday at 59.0%. Each day rests on about 37 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 2443 runs when it is late
The 89 late arrivals split 36 under half an hour, 21 between 30 and 60 minutes, and 32 an hour or more.
- 15+ min early54 flights20.8%
- Within 15 min117 flights45.0%
- 15–29 min late36 flights13.8%
- 30–59 min late21 flights8.1%
- 1–2 hours late15 flights5.8%
- 2+ hours late17 flights6.5%
Scale runs 0% to 100%.
Share of 260 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 71 departures that left 15 minutes late or more, only 8 made it up before arrival. In the other direction, 26 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 JAX.
The worst days
Worst days for UA 2443
The latest arrival of the period was on 17 June 2026, 6 hours 53 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. Three of the five worst days fell in June 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 17 June 2026 | 6 hours 53 minutes | Late-arriving aircraft |
| 15 March 2026 | 6 hours 37 minutes | Late-arriving aircraft |
| 11 June 2026 | 6 hours 12 minutes | Carrier |
| 24 June 2026 | 5 hours 31 minutes | Late-arriving aircraft |
| 21 May 2026 | 5 hours 20 minutes | Late-arriving aircraft |
Delay causes
Why UA 2443 runs late
Late-arriving aircraft accounts for 59% of the 7,080 delay minutes carriers reported here, and the remaining four split what is left.
- 59%Late-arriving aircraft
- 24%Carrier
- 14%National Airspace System
- 3%Extreme weather
59% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 7,080 reported delay minutes here, that single category outweighs weather by 21 to one. The split is drawn from 7,080 delay minutes reported on UA 2443.
Cancellations are rare at 0.38%, below the national 1.89% 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 routes
What a delay on this flight costs
12.3% 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 864 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 CLE to ORD (180), LAX to CLE (50) and ORD to FLL (21), but none flew often enough under UA 2443 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ORD to JAX only.
One caution: this is a thin sample. 261 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 2443
For a booking, UA 2443 is a flight to put a long connection behind. 12.3% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.
Related
Where to go next
- ORD to JAX, every carrier and departure
- JAX to ORD, the return direction
- Chicago O'Hare International (ORD) delay statistics
- Jacksonville International (JAX) 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.