About 1 in 6 UA 539 flights from Dallas arrived 15+ minutes late, diverted or cancelled over the past year (17%); 1.6% were cancelled. The typical flight landed 10 minutes early.
UA 539: DFW → IAH
Scheduled to leave Dallas at 11:59 a.m. local time. Over the past year it arrived on time 83% of the time (257 flights), better than other UA flights on the route at that hour (79%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 42 | 74% |
| Tuesday | 41 | 90% |
| Wednesday | 42 | 86% |
| Thursday | 41 | 83% |
| Friday | 41 | 80% |
| Saturday | 16 | — |
| Sunday | 34 | 82% |
Why it was late
All flights DFW → IAH · Connecting off UA 539? Check the risk
UA 539: ORD → DFW
Scheduled to leave Chicago at 7:15 a.m. local time. Over the past year it arrived on time 82% of the time (243 flights), in line with other UA flights on the route at that hour (83%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 39 | 79% |
| Tuesday | 35 | 89% |
| Wednesday | 35 | 77% |
| Thursday | 37 | 81% |
| Friday | 38 | 82% |
| Saturday | 22 | 86% |
| Sunday | 37 | 84% |
Why it was late
All flights ORD → DFW · Connecting off UA 539? Check the risk
Questions
How often is UA 539 from DFW to IAH late?
United Airlines 539 from Dallas/Fort Worth, TX to Houston, TX arrived 15 or more minutes late, was diverted or was cancelled on 17% of 257 scheduled flights between September 2025 and August 2026. 1.6% were cancelled.
How often is UA 539 from ORD to DFW late?
United Airlines 539 from Chicago, IL to Dallas/Fort Worth, TX arrived 15 or more minutes late, was diverted or was cancelled on 18% of 243 scheduled flights between September 2025 and August 2026. 0.4% 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.