Flight number record
UA 1003
United Airlines · Denver to Charleston
- Route
- DEN → CHS
- Departs
- 09:45
- Flights
- 295
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s UA 1003, check with United Airlines.
UA 1003 earns a B+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 7 points better than the national rate of 77.6%. When something does go wrong the average delay runs roughly 45 minutes. That rests on 295 flights, with a median arrival 3 minutes early.
Set against the rest of the country, UA 1003's record is 7 points better than the US average of 77.6%. That gap is worth roughly 68 fewer late arrivals for every thousand flights.
Key figures
On time
84.4%
Arrivals under 15 minutes late, of 294 completed flights
Avg delay
47 min
Across delayed arrivals only, not all flights
Cancelled
0.34%
National rate is 1.81%
1 hour+ late
3.4%
National rate is 8.1%
These figures cover 295 flights between July 2025 and June 2026. The median arrival is 3 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
Schedule
When UA 1003 flies
UA 1003 flies DEN to CHS without a single fixed slot. Its most common scheduled departure was 09:45, used on 77 of 295 flights, with 09:48 (37 flights) and 09:35 (32 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 09:4577 flights26.1%
- Departs 09:4837 flights12.5%
- Departs 09:3532 flights10.8%
Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 09:45 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and UA 1003 runs level with that at 84.4%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
Against the route
UA 1003 next to DEN to CHS
Every carrier on DEN to CHS combined arrived on time 77.0% of the time across 643 flights, so UA 1003 is 7 points ahead of it. Across its whole network United Airlines managed 79.0%, which this flight beats by 5 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 1003thin sample | 295 | 84.4% | 47 min | 0.34% | B+ |
| All United Airlines on DEN–CHS | 438 | 80.7% | 43 min | 0.46% | B+ |
| All carriers on DEN–CHS | 643 | 77.0% | 45 min | 0.31% | B+ |
| United Airlines, whole network | 821,041 | 79.0% | 72 min | 1.01% | B |
Across the year
UA 1003 quarter by quarter
UA 1003 did not run the same all year. Its best quarter was Jul–Sep 2025 at 90.7% on time and its weakest Apr–Jun 2026 at 80.0%, a swing of 11 points on roughly 74 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.
- Jul–Sep 202543 flights90.7%
- Oct–Dec 202592 flights80.4%
- Jan–Mar 202690 flights88.8%
- Apr–Jun 202670 flights80.0%
Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, UA 1003 ranged from 78.6% on Sunday to 90.5% on Thursday. With about 42 flights behind each day, a spread of 12 points is inside normal variation, so the day you fly is not worth changing for this flight.
Delay causes
Why UA 1003 runs late
One category carries most of the weight here. Carrier accounts for 48% of the 2,181 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.
- 48%Carrier
- 30%National Airspace System
- 22%Late-arriving aircraft
The largest share of delay minutes, 48%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 1,040 of the 2,181 delay minutes reported here. The split is drawn from 2,181 delay minutes reported on UA 1003.
Cancellations are rare at 0.34%, 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 routes
What a delay on this flight costs
Badly late arrivals are rare here: only 3.4% land an hour or more behind schedule, against 8.1% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
The 1,449 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 same number turns up on three other city pairs in the data, including SBA to DEN (170), MTJ to DEN (155) and DEN to JAX (20), but none flew often enough under UA 1003 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DEN to CHS only.
One caution: this is a thin sample. 295 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 1003
For a booking, read UA 1003 as 84.4% on time with 0.34% cancelled over 295 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- Denver International (DEN) 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
- Worst months to fly in the US, ranked by the data
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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.