UA3603 MCI → ORD

United Airlines · Kansas City, MO to Chicago, IL · 17 flights observed, 2025-12-18 to 2026-01-05 · 403 mi

This flight has been getting more reliable recently — 2026-01's on-time rate (100%) is well above the 67% average from earlier months.

UA3603 covers more than one route in the data window — the stats below are for MCI → ORD, the one it has flown most recently. The others are linked under “Other routes”.

On-time arrival
76%
Median delay
-10 min
90th percentile
+46 min
Cancellation rate
0%

How often is UA3603 on time?

Across 17 flights on MCI → ORD from 2025-12-18 to 2026-01-05, UA3603 arrived within 15 minutes of schedule 76% of the time. The median arrival delay was -10 min, and the worst 10% of flights arrived +46 min or later. 0% of flights were cancelled.

Delay distribution

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

ArrivalFlightsShare
Early / on-time1376%
16-30 min00%
31-60 min212%
61-120 min212%
2+ hrs00%

Performance by month

MonthFlightsOn-timeAvg delay
2025-121267%+9 min
2026-015100%-15 min

Performance by day of week

DayFlightsOn-time
Mon3100%
Tue250%
WedNo data—
Thu3100%
Fri367%
Sat367%
Sun367%

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