UA3598 STL → ORD

United Airlines · St. Louis, MO to Chicago, IL · 16 flights observed, 2025-10-26 to 2025-12-17 · 258 mi

This flight has been getting less reliable recently — 2025-12's on-time rate (40%) is well below the 83% average from earlier months.

UA3598 covers more than one route in the data window — the stats below are for STL → ORD, the one it has flown most recently. The others are linked under “Other routes”.

On-time arrival
56%
Median delay
-1 min
90th percentile
+92 min
Cancellation rate
0%

How often is UA3598 on time?

Across 16 flights on STL → ORD from 2025-10-26 to 2025-12-17, UA3598 arrived within 15 minutes of schedule 56% of the time. The median arrival delay was -1 min, and the worst 10% of flights arrived +92 min or later. 0% of flights were cancelled.

Delay distribution

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

ArrivalFlightsShare
Early / on-time956%
16-30 min319%
31-60 min16%
61-120 min213%
2+ hrs16%

Performance by month

MonthFlightsOn-timeAvg delay
2025-10683%-4 min
2025-121040%+46 min

Performance by day of week

DayFlightsOn-time
Mon1100%
Tue475%
Wed450%
Thu10%
Fri1100%
Sat250%
Sun333%

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