About 1 in 3 UA 4950 flights from Washington arrived 15+ minutes late, diverted or cancelled over the past year (29%); 3.3% were cancelled. The typical flight landed 1 minutes early.
UA 4950: IAD → ITH
Scheduled to leave Washington at 10:25 p.m. local time, operated by CommutAir as C5 4950. Over the past year it arrived on time 71% of the time (362 flights), in line with other UA flights on the route at that hour (71%). Last seen in the data Aug 31, 2026.
Usually United Airlines's last flight of the day from Washington to Ithaca (100% of days). United Airlines's last IAD–ITH flight was cancelled 3.3% of the time, against 4.6% for its earlier ones. If it's cancelled, the next United Airlines flight is usually around 5:35 p.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 53 | 77% |
| Tuesday | 52 | 71% |
| Wednesday | 52 | 73% |
| Thursday | 51 | 67% |
| Friday | 51 | 73% |
| Saturday | 51 | 75% |
| Sunday | 52 | 63% |
Why it was late
All flights IAD → ITH · Connecting off UA 4950? Check the risk
Questions
How often is UA 4950 from IAD to ITH late?
United Airlines 4950 from Washington, DC to Ithaca/Cortland, NY arrived 15 or more minutes late, was diverted or was cancelled on 29% of 362 scheduled flights between September 2025 and August 2026. 3.3% 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.