UA6187 IAH → STL

United Airlines · Houston, TX to St. Louis, MO · 41 flights observed, 2026-05-21 to 2026-06-30 · 667 mi

This flight's reliability varies a lot by day of week — 83% on-time on Mondays vs. 33% on Thursdays.

UA6187 covers more than one route in the data window — the stats below are for IAH → STL, the one it has flown most recently. The others are linked under “Other routes”.

On-time arrival
70%
Median delay
-6 min
90th percentile
+82 min
Cancellation rate
2%

How often is UA6187 on time?

Across 41 flights on IAH → STL from 2026-05-21 to 2026-06-30, UA6187 arrived within 15 minutes of schedule 70% of the time. The median arrival delay was -6 min, and the worst 10% of flights arrived +82 min or later. 2% of flights were cancelled.

Delay distribution

Arrival delay for completed flights (excludes cancellations and diversions).

ArrivalFlightsShare
Early / on-time2870%
16-30 min25%
31-60 min513%
61-120 min513%
2+ hrs00%

Performance by month

MonthFlightsOn-timeAvg delay
2026-051173%+7 min
2026-062969%+10 min

Performance by day of week

DayFlightsOn-time
Mon683%
Tue683%
Wed4100%
Thu633%
Fri667%
Sat667%
Sun667%

Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…