ON TIMEBOARD
United Airlines / DEN → ORD

UA 2865 on time

United Airlines 2865: Denver to Chicago at 11:15 a.m.; Santa Barbara to Denver at 5:00 a.m. (past 12 months). Figures below the title are for DEN → ORD, its busiest leg

On time
78%
365 flights · likely 74–82%
Cancelled
0.0%
of scheduled flights
Typical arrival
−2 min
median vs schedule
When late
+79 min
average delay
Similar flights
78%
UA, same route & hour

About 1 in 5 UA 2865 flights from Denver arrived 15+ minutes late, diverted or cancelled over the past year (22%); 0.0% were cancelled. The typical flight landed 2 minutes early.

UA 2865: DEN → ORD

Scheduled to leave Denver at 11:15 a.m. local time. Over the past year it arrived on time 78% of the time (365 flights), in line with other UA flights on the route at that hour (78%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%Sep 2025: 80% on time (30 flights)80SepOct 2025: 87% on time (31 flights)87OctNov 2025: 80% on time (30 flights)80NovDec 2025: 74% on time (31 flights)74DecJan 2026: 74% on time (31 flights)74JanFeb 2026: 89% on time (28 flights)89FebMar 2026: 71% on time (31 flights)71MarApr 2026: 77% on time (30 flights)77AprMay 2026: 77% on time (31 flights)77MayJun 2026: 80% on time (30 flights)80JunJul 2026: 77% on time (31 flights)77JulAug 2026: 74% on time (31 flights)74Aug

By day of week

DayFlightsOn time
Monday5381%
Tuesday5283%
Wednesday5275%
Thursday5285%
Friday5273%
Saturday5283%
Sunday5269%

Why it was late

Air traffic & airport (NAS) 58%Late inbound plane 26%Airline (crew, maintenance, ops) 16%

All flights DEN → ORD · Connecting off UA 2865? Check the risk

UA 2865: SBA → DEN

Scheduled to leave Santa Barbara at 5:00 a.m. local time. Over the past year it arrived on time 93% of the time (237 flights), in line with other UA flights on the route at that hour (92%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%Jan 2026: 88% on time (26 flights)88JanFeb 2026: 96% on time (27 flights)96FebMar 2026: 87% on time (31 flights)87MarApr 2026: 100% on time (30 flights)100AprMay 2026: 97% on time (31 flights)97MayJun 2026: 93% on time (30 flights)93JunJul 2026: 87% on time (31 flights)87JulAug 2026: 97% on time (31 flights)97Aug

By day of week

DayFlightsOn time
Monday3494%
Tuesday3494%
Wednesday3397%
Thursday34100%
Friday3494%
Saturday3485%
Sunday3488%

Why it was late

Airline (crew, maintenance, ops) 70%Severe weather 18%Air traffic & airport (NAS) 12%

All flights SBA → DEN · Connecting off UA 2865? Check the risk

Questions

How often is UA 2865 from DEN to ORD late?

United Airlines 2865 from Denver, CO to Chicago, IL arrived 15 or more minutes late, was diverted or was cancelled on 22% of 365 scheduled flights between September 2025 and August 2026. 0.0% were cancelled.

How often is UA 2865 from SBA to DEN late?

United Airlines 2865 from Santa Barbara, CA to Denver, CO arrived 15 or more minutes late, was diverted or was cancelled on 7% of 237 scheduled flights between September 2025 and August 2026. 0.4% 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.