ON TIMEBOARD
United Airlines / ORD → IAH

UA 1448 on time

United Airlines 1448: Chicago to Houston at 12:40 p.m.; Raleigh to Chicago at 10:00 a.m. (past 12 months). Figures below the title are for ORD → IAH, its busiest leg

On time
88%
156 flights · likely 82–92%
Cancelled
0.6%
of scheduled flights
Typical arrival
−9 min
median vs schedule
When late
+98 min
average delay
Similar flights
87%
UA, same route & hour

About 1 in 8 UA 1448 flights from Chicago arrived 15+ minutes late, diverted or cancelled over the past year (12%); 0.6% were cancelled. The typical flight landed 9 minutes early.

UA 1448: ORD → IAH

Scheduled to leave Chicago at 12:40 p.m. local time. Over the past year it arrived on time 88% of the time (156 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%Mar 2026: 81% on time (27 flights)81MarApr 2026: 87% on time (30 flights)87AprMay 2026: 87% on time (31 flights)87MayJun 2026: too few flights (6 flights)JunJul 2026: 90% on time (31 flights)90JulAug 2026: 90% on time (31 flights)90Aug

By day of week

DayFlightsOn time
Monday2286%
Tuesday2181%
Wednesday2190%
Thursday2391%
Friday2383%
Saturday2391%
Sunday2391%

Why it was late

Late inbound plane 50%Air traffic & airport (NAS) 28%Airline (crew, maintenance, ops) 13%Severe weather 9%

All flights ORD → IAH · Connecting off UA 1448? Check the risk

UA 1448: RDU → ORD

Scheduled to leave Raleigh at 10:00 a.m. local time. Over the past year it arrived on time 84% of the time (148 flights), in line with other UA flights on the route at that hour (85%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%Feb 2026: 94% on time (17 flights)94FebMar 2026: too few flights (13 flights)MarApr 2026: 83% on time (30 flights)83AprMay 2026: 95% on time (20 flights)95MayJun 2026: too few flights (6 flights)JunJul 2026: 77% on time (31 flights)77JulAug 2026: 74% on time (31 flights)74Aug

By day of week

DayFlightsOn time
Monday2181%
Tuesday2378%
Wednesday2387%
Thursday2090%
Friday2080%
Saturday2085%
Sunday2186%

Why it was late

Severe weather 40%Late inbound plane 29%Air traffic & airport (NAS) 25%Airline (crew, maintenance, ops) 6%

All flights RDU → ORD · Connecting off UA 1448? Check the risk

Questions

How often is UA 1448 from ORD to IAH late?

United Airlines 1448 from Chicago, IL to Houston, TX arrived 15 or more minutes late, was diverted or was cancelled on 12% of 156 scheduled flights between September 2025 and August 2026. 0.6% were cancelled.

How often is UA 1448 from RDU to ORD late?

United Airlines 1448 from Raleigh/Durham, NC to Chicago, IL arrived 15 or more minutes late, was diverted or was cancelled on 16% of 148 scheduled flights between September 2025 and August 2026. 0.0% 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.