About 1 in 4 UA 4870 flights from Harlingen arrived 15+ minutes late, diverted or cancelled over the past year (23%); 2.3% were cancelled. The typical flight landed 6 minutes early.
UA 4870: HRL → IAH
Scheduled to leave Harlingen at 5:18 p.m. local time, operated by CommutAir as C5 4870. Over the past year it arrived on time 77% of the time (262 flights), in line with other UA flights on the route at that hour (76%). Last seen in the data Aug 31, 2026.
Usually United Airlines's last flight of the day from Harlingen to Houston (100% of days). United Airlines's last HRL–IAH flight was cancelled 1.6% of the time, against 0.5% for its earlier ones. If it's cancelled, the next United Airlines flight is usually around 5:10 a.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 39 | 79% |
| Tuesday | 37 | 86% |
| Wednesday | 35 | 80% |
| Thursday | 36 | 81% |
| Friday | 38 | 68% |
| Saturday | 38 | 66% |
| Sunday | 39 | 79% |
Why it was late
All flights HRL → IAH · Connecting off UA 4870? Check the risk
Questions
How often is UA 4870 from HRL to IAH late?
United Airlines 4870 from Harlingen/San Benito, TX to Houston, TX arrived 15 or more minutes late, was diverted or was cancelled on 23% of 262 scheduled flights between September 2025 and August 2026. 2.3% 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.