ON TIMEBOARD
United Airlines / DEN → ORD

UA 2430 on time

United Airlines 2430: Denver to Chicago at 7:45 a.m.; Chicago to Philadelphia at 2:30 p.m. (past 12 months). Figures below the title are for DEN → ORD, its busiest leg

On time
86%
269 flights · likely 82–90%
Cancelled
0.7%
of scheduled flights
Typical arrival
−11 min
median vs schedule
When late
+65 min
average delay
Similar flights
86%
UA, same route & hour

About 1 in 7 UA 2430 flights from Denver arrived 15+ minutes late, diverted or cancelled over the past year (14%); 0.7% were cancelled. The typical flight landed 11 minutes early.

UA 2430: DEN → ORD

Scheduled to leave Denver at 7:45 a.m. local time. Over the past year it arrived on time 86% of the time (269 flights), in line with other UA flights on the route at that hour (86%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%Aug 2025: too few flights (13 flights)AugSep 2025: 88% on time (24 flights)88SepDec 2025: too few flights (14 flights)DecJan 2026: 84% on time (31 flights)84JanFeb 2026: 89% on time (28 flights)89FebMar 2026: 74% on time (31 flights)74MarApr 2026: 97% on time (30 flights)97AprMay 2026: 86% on time (29 flights)86MayJun 2026: 96% on time (26 flights)96JunJul 2026: 89% on time (27 flights)89JulAug 2026: 79% on time (29 flights)79Aug

By day of week

DayFlightsOn time
Monday4188%
Tuesday4083%
Wednesday4090%
Thursday4095%
Friday4080%
Saturday2879%
Sunday4088%

Why it was late

Air traffic & airport (NAS) 41%Airline (crew, maintenance, ops) 31%Late inbound plane 28%

All flights DEN → ORD · Connecting off UA 2430? Check the risk

UA 2430: ORD → PHL

Scheduled to leave Chicago at 2:30 p.m. local time. Over the past year it arrived on time 63% of the time (179 flights), worse than other UA flights on the route at that hour (67%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%Mar 2026: 70% on time (27 flights)70MarApr 2026: 67% on time (30 flights)67AprMay 2026: 73% on time (30 flights)73MayJun 2026: 70% on time (30 flights)70JunJul 2026: 55% on time (31 flights)55JulAug 2026: 45% on time (31 flights)45Aug

By day of week

DayFlightsOn time
Monday2658%
Tuesday2572%
Wednesday2560%
Thursday2662%
Friday2642%
Saturday2685%
Sunday2564%

Why it was late

Late inbound plane 47%Air traffic & airport (NAS) 35%Airline (crew, maintenance, ops) 16%Severe weather 1%

All flights ORD → PHL · Connecting off UA 2430? Check the risk

Questions

How often is UA 2430 from DEN to ORD late?

United Airlines 2430 from Denver, CO to Chicago, IL arrived 15 or more minutes late, was diverted or was cancelled on 14% of 269 scheduled flights between September 2025 and August 2026. 0.7% were cancelled.

How often is UA 2430 from ORD to PHL late?

United Airlines 2430 from Chicago, IL to Philadelphia, PA arrived 15 or more minutes late, was diverted or was cancelled on 37% of 179 scheduled flights between September 2025 and August 2026. 1.7% 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.