About 1 in 9 UA 3487 flights from Washington arrived 15+ minutes late, diverted or cancelled over the past year (11%); 1.3% were cancelled. The typical flight landed 11 minutes early.
UA 3487: IAD → CHS
Scheduled to leave Washington at 12:35 p.m. local time, operated by Republic Airways as YX 3487. Over the past year it arrived on time 89% of the time (156 flights), better than other UA flights on the route at that hour (84%). Last seen in the data Aug 10, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 23 | 91% |
| Tuesday | 21 | 100% |
| Wednesday | 21 | 95% |
| Thursday | 23 | 100% |
| Friday | 23 | 70% |
| Saturday | 23 | 96% |
| Sunday | 22 | 73% |
Why it was late
All flights IAD → CHS · Connecting off UA 3487? Check the risk
Questions
How often is UA 3487 from IAD to CHS late?
United Airlines 3487 from Washington, DC to Charleston, SC arrived 15 or more minutes late, was diverted or was cancelled on 11% of 156 scheduled flights between September 2025 and August 2026. 1.3% 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.