Flight OddsUA631 PHX → IAH
United Airlines · Phoenix, AZ to Houston, TX · 24 flights observed, 2026-03-05 to 2026-03-28 · 1,009 mi
UA631 covers more than one route in the data window — the stats below are for PHX → IAH, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
83%
Median delay
+1 min
90th percentile
+105 min
Cancellation rate
0%
How often is UA631 on time?
Across 24 flights on PHX → IAH from 2026-03-05 to 2026-03-28, UA631 arrived within 15 minutes of schedule 83% of the time. The median arrival delay was +1 min, and the worst 10% of flights arrived +105 min or later. 0% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 19 | 83% |
| 16-30 min | 1 | 4% |
| 31-60 min | 0 | 0% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 3 | 13% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-03 | 23 | 83% | +18 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 3 | 33% |
| Tue | 3 | 100% |
| Wed | 3 | 67% |
| Thu | 4 | 100% |
| Fri | 4 | 100% |
| Sat | 4 | 75% |
| Sun | 2 | 100% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…