About 1 in 6 UA 4372 flights from Washington arrived 15+ minutes late, diverted or cancelled over the past year (18%); 0.8% were cancelled. The typical flight landed 9 minutes early.
UA 4372: IAD → MDT
Scheduled to leave Washington at 12:50 p.m. local time, operated by CommutAir as C5 4372. Over the past year it arrived on time 82% of the time (357 flights), in line with other UA flights on the route at that hour (82%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 53 | 75% |
| Tuesday | 52 | 83% |
| Wednesday | 52 | 90% |
| Thursday | 52 | 87% |
| Friday | 52 | 73% |
| Saturday | 47 | 87% |
| Sunday | 49 | 82% |
Why it was late
All flights IAD → MDT · Connecting off UA 4372? Check the risk
Questions
How often is UA 4372 from IAD to MDT late?
United Airlines 4372 from Washington, DC to Harrisburg, PA arrived 15 or more minutes late, was diverted or was cancelled on 18% of 357 scheduled flights between September 2025 and August 2026. 0.8% 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.