ON TIMEBOARD
United Airlines / CLE → IAD

UA 1252 on time

United Airlines 1252: Cleveland to Washington at 6:00 a.m.; Washington to Chicago at 10:31 a.m. (past 12 months). Figures below the title are for CLE → IAD, its busiest leg

On time
96%
179 flights · likely 92–98%
Cancelled
0.6%
of scheduled flights
Typical arrival
−12 min
median vs schedule
When late
+48 min
average delay
Similar flights
94%
UA, same route & hour

About 1 in 26 UA 1252 flights from Cleveland arrived 15+ minutes late, diverted or cancelled over the past year (4%); 0.6% were cancelled. The typical flight landed 12 minutes early.

UA 1252: CLE → IAD

Scheduled to leave Cleveland at 6:00 a.m. local time. Over the past year it arrived on time 96% of the time (179 flights), in line with other UA flights on the route at that hour (94%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%Mar 2026: 100% on time (27 flights)100MarApr 2026: 97% on time (30 flights)97AprMay 2026: 97% on time (30 flights)97MayJun 2026: 93% on time (30 flights)93JunJul 2026: 94% on time (31 flights)94JulAug 2026: 97% on time (31 flights)97Aug

By day of week

DayFlightsOn time
Monday2696%
Tuesday25100%
Wednesday2596%
Thursday2696%
Friday2692%
Saturday2696%
Sunday2596%

Why it was late

Airline (crew, maintenance, ops) 85%Air traffic & airport (NAS) 15%

All flights CLE → IAD · Connecting off UA 1252? Check the risk

UA 1252: IAD → ORD

Scheduled to leave Washington at 10:31 a.m. local time. Over the past year it arrived on time 91% of the time (156 flights), in line with other UA flights on the route at that hour (90%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%Mar 2026: too few flights (3 flights)MarApr 2026: 87% on time (30 flights)87AprMay 2026: 94% on time (31 flights)94MayJun 2026: 100% on time (30 flights)100JunJul 2026: 87% on time (31 flights)87JulAug 2026: 90% on time (31 flights)90Aug

By day of week

DayFlightsOn time
Monday2391%
Tuesday2282%
Wednesday22100%
Thursday2295%
Friday2295%
Saturday2295%
Sunday2378%

Why it was late

Late inbound plane 46%Air traffic & airport (NAS) 35%Airline (crew, maintenance, ops) 18%

All flights IAD → ORD · Connecting off UA 1252? Check the risk

Questions

How often is UA 1252 from CLE to IAD late?

United Airlines 1252 from Cleveland, OH to Washington, DC arrived 15 or more minutes late, was diverted or was cancelled on 4% of 179 scheduled flights between September 2025 and August 2026. 0.6% were cancelled.

How often is UA 1252 from IAD to ORD late?

United Airlines 1252 from Washington, DC to Chicago, IL arrived 15 or more minutes late, was diverted or was cancelled on 9% of 156 scheduled flights between September 2025 and August 2026. 0.6% 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.