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United Airlines / ORD → MCO

UA 1811 on time

United Airlines 1811: Chicago to Orlando at 12:45 p.m.; Philadelphia to Chicago at 8:05 a.m. (past 12 months). Figures below the title are for ORD → MCO, its busiest leg

On time
74%
239 flights · likely 69–80%
Cancelled
1.7%
of scheduled flights
Typical arrival
−7 min
median vs schedule
When late
+46 min
average delay
Similar flights
71%
UA, same route & hour

About 1 in 4 UA 1811 flights from Chicago arrived 15+ minutes late, diverted or cancelled over the past year (26%); 1.7% were cancelled. The typical flight landed 7 minutes early.

UA 1811: ORD → MCO

Scheduled to leave Chicago at 12:45 p.m. local time. Over the past year it arrived on time 74% of the time (239 flights), better than other UA flights on the route at that hour (71%). Last seen in the data Aug 10, 2026.

Month by month

40%70%100%Oct 2025: too few flights (6 flights)OctNov 2025: 82% on time (28 flights)82NovDec 2025: 60% on time (15 flights)60DecJan 2026: 70% on time (23 flights)70JanFeb 2026: 85% on time (20 flights)85FebMar 2026: 76% on time (29 flights)76MarApr 2026: 87% on time (30 flights)87AprMay 2026: 85% on time (27 flights)85MayJun 2026: 77% on time (26 flights)77JunJul 2026: 54% on time (26 flights)54JulAug 2026: too few flights (9 flights)Aug

By day of week

DayFlightsOn time
Monday3967%
Tuesday2681%
Wednesday18—
Thursday3876%
Friday3959%
Saturday3974%
Sunday4083%

Why it was late

Air traffic & airport (NAS) 39%Airline (crew, maintenance, ops) 33%Late inbound plane 25%Severe weather 3%

All flights ORD → MCO · Connecting off UA 1811? Check the risk

UA 1811: PHL → ORD

Scheduled to leave Philadelphia at 8:05 a.m. local time. Over the past year it arrived on time 82% of the time (217 flights), in line with other UA flights on the route at that hour (81%). Last seen in the data Aug 10, 2026.

Month by month

40%70%100%Jan 2026: 73% on time (26 flights)73JanFeb 2026: 93% on time (28 flights)93FebMar 2026: 77% on time (31 flights)77MarApr 2026: 80% on time (30 flights)80AprMay 2026: 87% on time (31 flights)87MayJun 2026: 93% on time (30 flights)93JunJul 2026: 81% on time (31 flights)81JulAug 2026: too few flights (10 flights)Aug

By day of week

DayFlightsOn time
Monday3174%
Tuesday3184%
Wednesday3190%
Thursday3184%
Friday3187%
Saturday3181%
Sunday3177%

Why it was late

Airline (crew, maintenance, ops) 48%Air traffic & airport (NAS) 34%Late inbound plane 14%Severe weather 3%

All flights PHL → ORD · Connecting off UA 1811? Check the risk

Questions

How often is UA 1811 from ORD to MCO late?

United Airlines 1811 from Chicago, IL to Orlando, FL arrived 15 or more minutes late, was diverted or was cancelled on 26% of 239 scheduled flights between September 2025 and August 2026. 1.7% were cancelled.

How often is UA 1811 from PHL to ORD late?

United Airlines 1811 from Philadelphia, PA to Chicago, IL arrived 15 or more minutes late, was diverted or was cancelled on 18% of 217 scheduled flights between September 2025 and August 2026. 2.8% 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.