Flight OddsUA521 IAH → LGA
United Airlines · Houston, TX to New York, NY · 15 flights observed, 2026-02-12 to 2026-03-04 · 1,416 mi
UA521 covers more than one route in the data window — the stats below are for IAH → LGA, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
86%
Median delay
-2 min
90th percentile
+15 min
Cancellation rate
7%
How often is UA521 on time?
Across 15 flights on IAH → LGA from 2026-02-12 to 2026-03-04, UA521 arrived within 15 minutes of schedule 86% of the time. The median arrival delay was -2 min, and the worst 10% of flights arrived +15 min or later. 7% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 12 | 86% |
| 16-30 min | 2 | 14% |
| 31-60 min | 0 | 0% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-02 | 11 | 82% | +1 min |
| 2026-03 | 3 | 100% | -10 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 2 | 100% |
| Tue | 3 | 67% |
| Wed | 3 | 100% |
| Thu | 3 | 67% |
| Fri | 3 | 100% |
| Sat | No data | — |
| Sun | No data | — |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…