About 1 in 6 UA 2491 flights from Houston arrived 15+ minutes late, diverted or cancelled over the past year (16%); 0.3% were cancelled. The typical flight landed 10 minutes early.
UA 2491: IAH → SAN
Scheduled to leave Houston at 9:30 a.m. local time. Over the past year it arrived on time 84% of the time (365 flights), in line with other UA flights on the route at that hour (84%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 53 | 79% |
| Tuesday | 52 | 94% |
| Wednesday | 52 | 90% |
| Thursday | 52 | 71% |
| Friday | 52 | 87% |
| Saturday | 52 | 81% |
| Sunday | 52 | 83% |
Why it was late
All flights IAH → SAN · Connecting off UA 2491? Check the risk
UA 2491: TPA → IAH
Scheduled to leave Tampa at 7:00 a.m. local time. Over the past year it arrived on time 94% of the time (237 flights), in line with other UA flights on the route at that hour (95%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 34 | 88% |
| Tuesday | 34 | 97% |
| Wednesday | 33 | 94% |
| Thursday | 34 | 94% |
| Friday | 34 | 100% |
| Saturday | 34 | 94% |
| Sunday | 34 | 88% |
Why it was late
All flights TPA → IAH · Connecting off UA 2491? Check the risk
Questions
How often is UA 2491 from IAH to SAN late?
United Airlines 2491 from Houston, TX to San Diego, CA arrived 15 or more minutes late, was diverted or was cancelled on 16% of 365 scheduled flights between September 2025 and August 2026. 0.3% were cancelled.
How often is UA 2491 from TPA to IAH late?
United Airlines 2491 from Tampa, FL to Houston, TX arrived 15 or more minutes late, was diverted or was cancelled on 6% of 237 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.