About 1 in 5 UA 1634 flights from Dallas arrived 15+ minutes late, diverted or cancelled over the past year (20%); 1.4% were cancelled. The typical flight landed 11 minutes early.
UA 1634: DFW → ORD
Scheduled to leave Dallas at 10:10 a.m. local time. Over the past year it arrived on time 80% of the time (214 flights), in line with other UA flights on the route at that hour (80%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 33 | 73% |
| Tuesday | 33 | 88% |
| Wednesday | 33 | 85% |
| Thursday | 35 | 80% |
| Friday | 33 | 85% |
| Saturday | 16 | — |
| Sunday | 31 | 68% |
Why it was late
All flights DFW → ORD · Connecting off UA 1634? Check the risk
Questions
How often is UA 1634 from DFW to ORD late?
United Airlines 1634 from Dallas/Fort Worth, TX to Chicago, IL arrived 15 or more minutes late, was diverted or was cancelled on 20% of 214 scheduled flights between September 2025 and August 2026. 1.4% 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.