About 1 in 4 UA 3577 flights from Pittsburgh arrived 15+ minutes late, diverted or cancelled over the past year (23%); 5.3% were cancelled. The typical flight landed 9 minutes early.
UA 3577: PIT → ORD
Scheduled to leave Pittsburgh at 4:10 p.m. local time, operated by Republic Airways as YX 3577. Over the past year it arrived on time 77% of the time (132 flights), better than other UA flights on the route at that hour (73%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 21 | 81% |
| Tuesday | 17 | — |
| Wednesday | 21 | 71% |
| Thursday | 19 | — |
| Friday | 21 | 90% |
| Saturday | 13 | — |
| Sunday | 20 | 65% |
Why it was late
All flights PIT → ORD · Connecting off UA 3577? Check the risk
Questions
How often is UA 3577 from PIT to ORD late?
United Airlines 3577 from Pittsburgh, PA to Chicago, IL arrived 15 or more minutes late, was diverted or was cancelled on 23% of 132 scheduled flights between September 2025 and August 2026. 5.3% 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.