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United Airlines / DEN → CHS

UA 1003 on time

United Airlines 1003: Denver to Charleston at 9:45 a.m.; Montrose to Denver at 7:25 a.m. (past 12 months). Figures below the title are for DEN → CHS, its busiest leg

On time
83%
344 flights · likely 79–87%
Cancelled
0.3%
of scheduled flights
Typical arrival
−1 min
median vs schedule
When late
+49 min
average delay
Similar flights
83%
UA, same route & hour

About 1 in 6 UA 1003 flights from Denver arrived 15+ minutes late, diverted or cancelled over the past year (17%); 0.3% were cancelled. The typical flight landed 1 minutes early.

UA 1003: DEN → CHS

Scheduled to leave Denver at 9:45 a.m. local time. Over the past year it arrived on time 83% of the time (344 flights), in line with other UA flights on the route at that hour (83%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%Sep 2025: 93% on time (30 flights)93SepOct 2025: 77% on time (31 flights)77OctNov 2025: 80% on time (30 flights)80NovDec 2025: 84% on time (31 flights)84DecJan 2026: 87% on time (31 flights)87JanFeb 2026: 89% on time (28 flights)89FebMar 2026: 87% on time (31 flights)87MarApr 2026: 79% on time (29 flights)79AprMay 2026: too few flights (11 flights)MayJun 2026: 87% on time (30 flights)87JunJul 2026: 74% on time (31 flights)74JulAug 2026: 87% on time (31 flights)87Aug

By day of week

DayFlightsOn time
Monday5084%
Tuesday4988%
Wednesday4982%
Thursday4990%
Friday4982%
Saturday4982%
Sunday4978%

Why it was late

Airline (crew, maintenance, ops) 44%Air traffic & airport (NAS) 39%Late inbound plane 17%

All flights DEN → CHS · Connecting off UA 1003? Check the risk

UA 1003: MTJ → DEN

Scheduled to leave Montrose at 7:25 a.m. local time. Over the past year it arrived on time 88% of the time (217 flights), in line with other UA flights on the route at that hour (87%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%Jan 2026: 81% on time (26 flights)81JanFeb 2026: too few flights (11 flights)FebMar 2026: 89% on time (27 flights)89MarApr 2026: 90% on time (30 flights)90AprMay 2026: 87% on time (31 flights)87MayJun 2026: 87% on time (30 flights)87JunJul 2026: 94% on time (31 flights)94JulAug 2026: 87% on time (31 flights)87Aug

By day of week

DayFlightsOn time
Monday3184%
Tuesday3194%
Wednesday3184%
Thursday3187%
Friday3184%
Saturday3194%
Sunday3187%

Why it was late

Airline (crew, maintenance, ops) 67%Air traffic & airport (NAS) 28%Severe weather 5%

All flights MTJ → DEN · Connecting off UA 1003? Check the risk

Questions

How often is UA 1003 from DEN to CHS late?

United Airlines 1003 from Denver, CO to Charleston, SC arrived 15 or more minutes late, was diverted or was cancelled on 17% of 344 scheduled flights between September 2025 and August 2026. 0.3% were cancelled.

How often is UA 1003 from MTJ to DEN late?

United Airlines 1003 from Montrose/Delta, CO to Denver, CO arrived 15 or more minutes late, was diverted or was cancelled on 12% of 217 scheduled flights between September 2025 and August 2026. 0.5% were cancelled.

Flight numbers change. Figures cover flights with this airline, number and route only. "Likely range" is the 95% interval for the true on-time rate given the number of flights. This is history, not live status: check United Airlines for today's flight. Method.