About 1 in 2 UA 5135 flights from Mason City arrived 15+ minutes late, diverted or cancelled over the past year (50%); 9.3% were cancelled. The typical flight landed 12 minutes late.
UA 5135: MCW → ORD
Scheduled to leave Mason City at 6:57 p.m. local time, operated by SkyWest as OO 5135. Over the past year it arrived on time 50% of the time (289 flights), in line with other UA flights on the route at that hour (51%). Last seen in the data Aug 31, 2026.
Usually United Airlines's last flight of the day from Mason City to Chicago (82% of days). United Airlines's last MCW–ORD flight was cancelled 10.7% of the time, against 3.8% for its earlier ones. If it's cancelled, the next United Airlines flight is usually around 9:45 a.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 49 | 49% |
| Tuesday | 26 | 54% |
| Wednesday | 49 | 53% |
| Thursday | 46 | 48% |
| Friday | 47 | 49% |
| Saturday | 25 | 52% |
| Sunday | 47 | 49% |
Why it was late
All flights MCW → ORD · Connecting off UA 5135? Check the risk
Questions
How often is UA 5135 from MCW to ORD late?
United Airlines 5135 from Mason City, IA to Chicago, IL arrived 15 or more minutes late, was diverted or was cancelled on 50% of 289 scheduled flights between September 2025 and August 2026. 9.3% 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.