Flight profile · United Airlines
UA2333
Charleston (CHS) to Chicago (ORD) · scheduled 6:30 AM – 7:33 AM
How UA2333 performs
677 operations, July 2023 – July 2026.
UA2333 arrived on time 90.1% of the time, against 81.5% for all CHS → ORD flights, so this departure is 8.6 percentage points better than the route as a whole. Against United Airlines’ own flights on this route it is 5.1 points better.
Source: US DOT Bureau of Transportation Statistics · 677 operations, July 2023 – July 2026 · If UA2333 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where UA2333 is right now
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Against the rest of the route
| Flight or route | On time | Cancelled | Median delay | Severe | Flights |
|---|---|---|---|---|---|
| UA2333 | 90.1% | 1.48% | -9 min | 2.9% | 677 |
| United Airlines on CHS → ORD | 85.0% | 1.63% | -8 min | 5.2% | 1,907 |
| All CHS → ORD flights | 81.5% | 1.88% | -8 min | 6.3% | 5,112 |
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026
Why UA2333 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding and fueling, all within the carrier’s control
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for UA2333 on CHS → ORD. Only delays of 15 minutes or more are attributed.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
Does a late aircraft delay this flight?
How often the plane that flies UA2333 comes in late, and what that does to the departure.
UA2333 is usually the aircraft’s first flight of the day: the schedule gives it a median of 8.7 hours on the ground at CHS, so its “inbound” is mostly the aircraft’s arrival the evening before.
When the aircraft came in 15 or more minutes late, UA2333 pushed back an average of 4 minutes late; when it came in on time or early, an average of 1 minute late.
Each departure is matched to the flight the same aircraft flew into CHS just before it, using the tail number in the DOT file, 649 of 668 departures in all. A departure is left out when that flight is unknown, was cancelled or diverted, or the aircraft had sat for more than 12 hours. A flight the airline cancelled never left and is not in the count, and one flown by a substitute aircraft is matched to the aircraft that flew it, not to the one first planned.
Against the network at the same turn length
| Share of departures | Inbound landed 15+ late | Left 15+ late after a late inbound | Left 15+ late after an on-time inbound |
|---|---|---|---|
| UA2333 | 30% | 8% | 6% |
| Network, same turn | 29% | 12% | 9% |
A night on the ground absorbs most of a late arrival, so a late inbound matters far less on a turn this long than on a same-day one.
The network row is every flight with a scheduled turn of 6 hours or more, usually overnight. How often UA2333’s aircraft landed 15 or more minutes late is about the same as the network’s and, once the aircraft was late, how often UA2333 left 15 or more minutes late is lower than the network’s.
More: Which Flight Numbers Pay for a Late Aircraft lists the flight numbers that pass a late aircraft on.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
From pushback to gate
When it leaves CHS late, does that still matter by the time it reaches ORD?
UA2333 pushes back an average of 2.3 minutes late and reaches the gate at ORD an average of 2.9 minutes early. The 5.2 minutes between those two figures are slack the published schedule already carries, which is why a late pushback on this flight does not reliably become a late arrival. Its 14.5 minutes on the taxiways at CHS is about what any departure from the airport in that hour spends.
On arrival at ORD, UA2333 spends 15.9 min taxiing from touchdown to the gate — ground time a connecting passenger sits through before they can even leave the aircraft, on top of however late the flight itself ran. That is 1.9 minutes shorter than a typical ORD arrival (17.8 min).
Departure delay is averaged over every pushback and arrival delay over every completed arrival, so the two counts differ by the flights that never reached ORD. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 8,666 departures from CHS scheduled in the clock hour UA2333 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at ORD (952,666 flights), not just UA2333’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026
The hour it leaves CHS
Part of any flight’s record belongs to the clock rather than to the flight. UA2333 has one departure time, so this is what that time is worth.
On-time arrival rate. 8,666 departures from CHS are scheduled in the 6 AM–7 AM hour over the period, against 77,398 across the whole day.
UA2333 is scheduled out of CHS at 6:30 AM, in the 6 AM–7 AM bank. Departures from CHS in that hour arrive on time 91.7% of the time against 80.6% across the airport’s whole day — the slot alone is worth 11.1 points better before anything about this particular flight is considered.
The two airport figures cover every departure from CHS to every destination, so they describe the slot rather than this journey — the like-for-like comparison against the route is above. Hours are scheduled local, and a number whose schedule moved between banks inside the period has no single hour and is not described here at all. Why the hour matters.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · Hours below 120 departures are not scored.
Other routes UA2333 has flown
A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| ORD→FCA Chicago to Kalispell | May 21, 2026 – July 31, 2026 | 60 | — |
| ORD→PWM Chicago to Portland | April 30, 2026 – May 20, 2026 | 21 | — |
| ORD→BWI Chicago to Baltimore | May 22, 2025 – April 29, 2026 | 121 | 78.5% |
| PBI→ORD West Palm Beach to Chicago | March 7, 2024 – March 28, 2026 | 42 | — |
| SFO→LAX San Francisco to Los Angeles | March 2–4, 2026 | 2 | — |
| MSN→ORD Madison to Chicago | December 18–25, 2025 | 2 | — |
| LAS→EWR Las Vegas to Newark | December 2–17, 2025 | 16 | — |
| ORD→BUF Chicago to Buffalo | September 25, 2025 – October 25, 2025 | 30 | — |
| ORD→SBN Chicago to South Bend | October 5, 2025 | 1 | — |
| ORD→DFW Chicago to Dallas–Fort Worth | August 19, 2024 – March 29, 2025 | 107 | 87.9% |
| MEM→DEN Memphis to Denver | January 7, 2025 – February 12, 2025 | 37 | — |
| IAD→MSY Washington to New Orleans | July 1, 2024 – August 18, 2024 | 49 | — |
| IAH→PDX Houston to Portland | June 27–30, 2024 | 4 | — |
| SJC→IAH San Jose to Houston | May 23, 2024 | 1 | — |
| ORD→SEA Chicago to Seattle | May 2–22, 2024 | 21 | — |
| SEA→IAH Seattle to Houston | May 2–22, 2024 | 21 | — |
| ORD→DEN Chicago to Denver | March 7–30, 2024 | 24 | — |
| ORD→BNA Chicago to Nashville | October 29, 2023 – February 14, 2024 | 61 | — |
| LAX→EWR Los Angeles to Newark | December 21, 2023 – January 8, 2024 | 19 | — |
| ORD→IAH Chicago to Houston | September 29–30, 2023 | 2 | — |
| ORD→JAC Chicago to Jackson | July 1, 2023 – September 4, 2023 | 66 | — |
Because the same number has served different journeys, the statistics above describe only the route UA2333 currently operates. Blending them would produce an average of two different flights.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
14 min late
against a median of 9 min early
Percentiles over 677 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
Data and methodology
Calculated by FlyerIntel from 677 records of UA2333 operating CHS → ORD, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.
Full methodology · Data sources · Report a problem
Related research: Most and Least Reliable Flight Numbers · The Delay You Inherit · Making Up Time in the Air
Analysis last recomputed