Flight OddsUA3999 EYW → IAH
United Airlines · Key West, FL to Houston, TX · 73 flights observed, 2026-03-05 to 2026-05-20 · 915 mi
UA3999 covers more than one route in the data window — the stats below are for EYW → IAH, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
82%
Median delay
-18 min
90th percentile
+45 min
Cancellation rate
3%
How often is UA3999 on time?
Across 73 flights on EYW → IAH from 2026-03-05 to 2026-05-20, UA3999 arrived within 15 minutes of schedule 82% of the time. The median arrival delay was -18 min, and the worst 10% of flights arrived +45 min or later. 3% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 56 | 82% |
| 16-30 min | 2 | 3% |
| 31-60 min | 4 | 6% |
| 61-120 min | 4 | 6% |
| 2+ hrs | 2 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-03 | 20 | 85% | +13 min |
| 2026-04 | 29 | 83% | -7 min |
| 2026-05 | 19 | 79% | -10 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 10 | 90% |
| Tue | 7 | 100% |
| Wed | 10 | 90% |
| Thu | 9 | 100% |
| Fri | 11 | 82% |
| Sat | 10 | 60% |
| Sun | 11 | 64% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…