About 1 in 9 UA 1524 flights from Washington arrived 15+ minutes late, diverted or cancelled over the past year (11%); 0.6% were cancelled. The typical flight landed 15 minutes early.
UA 1524: IAD → IAH
Scheduled to leave Washington at 8:30 a.m. local time. Over the past year it arrived on time 89% of the time (334 flights), in line with other UA flights on the route at that hour (89%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 49 | 88% |
| Tuesday | 48 | 92% |
| Wednesday | 48 | 92% |
| Thursday | 47 | 89% |
| Friday | 47 | 94% |
| Saturday | 47 | 89% |
| Sunday | 48 | 81% |
Why it was late
All flights IAD → IAH · Connecting off UA 1524? Check the risk
UA 1524: IAH → LAS
Scheduled to leave Houston at 11:55 a.m. local time. Over the past year it arrived on time 89% of the time (251 flights), in line with other UA flights on the route at that hour (92%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 36 | 92% |
| Tuesday | 34 | 91% |
| Wednesday | 34 | 91% |
| Thursday | 37 | 89% |
| Friday | 37 | 89% |
| Saturday | 37 | 84% |
| Sunday | 36 | 89% |
Why it was late
All flights IAH → LAS · Connecting off UA 1524? Check the risk
UA 1524: ORF → IAD
Scheduled to leave Norfolk at 6:05 a.m. local time. Over the past year it arrived on time 94% of the time (139 flights), better than other UA flights on the route at that hour (87%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 21 | 81% |
| Tuesday | 19 | — |
| Wednesday | 19 | — |
| Thursday | 20 | 100% |
| Friday | 21 | 100% |
| Saturday | 21 | 100% |
| Sunday | 18 | — |
Why it was late
All flights ORF → IAD · Connecting off UA 1524? Check the risk
Questions
How often is UA 1524 from IAD to IAH late?
United Airlines 1524 from Washington, DC to Houston, TX arrived 15 or more minutes late, was diverted or was cancelled on 11% of 334 scheduled flights between September 2025 and August 2026. 0.6% were cancelled.
How often is UA 1524 from IAH to LAS late?
United Airlines 1524 from Houston, TX to Las Vegas, NV arrived 15 or more minutes late, was diverted or was cancelled on 11% of 251 scheduled flights between September 2025 and August 2026. 0.0% were cancelled.
How often is UA 1524 from ORF to IAD late?
United Airlines 1524 from Norfolk, VA to Washington, DC arrived 15 or more minutes late, was diverted or was cancelled on 6% of 139 scheduled flights between September 2025 and August 2026. 0.0% 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.