About 1 in 3 UA 5420 flights from Chicago arrived 15+ minutes late, diverted or cancelled over the past year (40%); 3.3% were cancelled. The typical flight landed 6 minutes late.
UA 5420: ORD → MLI
Scheduled to leave Chicago at 1:55 p.m. local time, operated by SkyWest as OO 5420. Over the past year it arrived on time 60% of the time (123 flights), in line with other UA flights on the route at that hour (61%). Last seen in the data Aug 10, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 18 | — |
| Tuesday | 17 | — |
| Wednesday | 17 | — |
| Thursday | 18 | — |
| Friday | 18 | — |
| Saturday | 18 | — |
| Sunday | 17 | — |
Why it was late
All flights ORD → MLI · Connecting off UA 5420? Check the risk
Questions
How often is UA 5420 from ORD to MLI late?
United Airlines 5420 from Chicago, IL to Moline, IL arrived 15 or more minutes late, was diverted or was cancelled on 40% of 123 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.