About 1 in 13 UA 2135 flights from Seattle arrived 15+ minutes late, diverted or cancelled over the past year (8%); 0.5% were cancelled. The typical flight landed 16 minutes early.
UA 2135: SEA → IAH
Scheduled to leave Seattle at 7:00 a.m. local time. Over the past year it arrived on time 92% of the time (364 flights), in line with other UA flights on the route at that hour (93%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 53 | 89% |
| Tuesday | 52 | 92% |
| Wednesday | 52 | 94% |
| Thursday | 52 | 94% |
| Friday | 52 | 92% |
| Saturday | 51 | 84% |
| Sunday | 52 | 100% |
Why it was late
All flights SEA → IAH · Connecting off UA 2135? Check the risk
UA 2135: IAH → ORD
Scheduled to leave Houston at 2:20 p.m. local time. Over the past year it arrived on time 62% of the time (137 flights), better than other UA flights on the route at that hour (51%). Last seen in the data Aug 10, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 20 | 65% |
| Tuesday | 19 | — |
| Wednesday | 19 | — |
| Thursday | 20 | 75% |
| Friday | 20 | 60% |
| Saturday | 20 | 55% |
| Sunday | 19 | — |
Why it was late
All flights IAH → ORD · Connecting off UA 2135? Check the risk
Questions
How often is UA 2135 from SEA to IAH late?
United Airlines 2135 from Seattle, WA to Houston, TX arrived 15 or more minutes late, was diverted or was cancelled on 8% of 364 scheduled flights between September 2025 and August 2026. 0.5% were cancelled.
How often is UA 2135 from IAH to ORD late?
United Airlines 2135 from Houston, TX to Chicago, IL arrived 15 or more minutes late, was diverted or was cancelled on 38% of 137 scheduled flights between September 2025 and August 2026. 0.7% 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.