UA5251 DEN → COS

United Airlines · Denver, CO to Colorado Springs, CO · 19 flights observed, 2025-12-18 to 2026-01-05 · 73 mi

This flight has been getting less reliable recently — 2026-01's on-time rate (60%) is well below the 92% average from earlier months.

UA5251 covers more than one route in the data window — the stats below are for DEN → COS, the one it has flown most recently. The others are linked under “Other routes”.

On-time arrival
83%
Median delay
-6 min
90th percentile
+26 min
Cancellation rate
5%

How often is UA5251 on time?

Across 19 flights on DEN → COS from 2025-12-18 to 2026-01-05, UA5251 arrived within 15 minutes of schedule 83% of the time. The median arrival delay was -6 min, and the worst 10% of flights arrived +26 min or later. 5% of flights were cancelled.

Delay distribution

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

ArrivalFlightsShare
Early / on-time1583%
16-30 min16%
31-60 min16%
61-120 min16%
2+ hrs00%

Performance by month

MonthFlightsOn-timeAvg delay
2025-121392%-5 min
2026-01560%+12 min

Performance by day of week

DayFlightsOn-time
Mon367%
Tue2100%
Wed2100%
Thu3100%
Fri2100%
Sat367%
Sun367%

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