About 1 in 8 UA 4273 flights from Houston arrived 15+ minutes late, diverted or cancelled over the past year (13%); 1.2% were cancelled. The typical flight landed 13 minutes early.
UA 4273: IAH → GPT
Scheduled to leave Houston at 2:40 p.m. local time, operated by CommutAir as C5 4273. Over the past year it arrived on time 87% of the time (324 flights), in line with 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 | 53 | 81% |
| Tuesday | 32 | 94% |
| Wednesday | 44 | 86% |
| Thursday | 52 | 90% |
| Friday | 52 | 90% |
| Saturday | 40 | 80% |
| Sunday | 51 | 86% |
Why it was late
All flights IAH → GPT · Connecting off UA 4273? Check the risk
Questions
How often is UA 4273 from IAH to GPT late?
United Airlines 4273 from Houston, TX to Gulfport/Biloxi, MS arrived 15 or more minutes late, was diverted or was cancelled on 13% of 324 scheduled flights between September 2025 and August 2026. 1.2% 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.