AA3742 ORD → STL

American Airlines · Chicago, IL to St. Louis, MO · 32 flights observed, 2026-01-06 to 2026-02-11 · 258 mi

This flight's reliability varies a lot by day of week — 83% on-time on Tuesdays vs. 40% on Mondays.

AA3742 covers more than one route in the data window — the stats below are for ORD → STL, the one it has flown most recently. The others are linked under “Other routes”.

On-time arrival
56%
Median delay
+9 min
90th percentile
+108 min
Cancellation rate
0%

How often is AA3742 on time?

Across 32 flights on ORD → STL from 2026-01-06 to 2026-02-11, AA3742 arrived within 15 minutes of schedule 56% of the time. The median arrival delay was +9 min, and the worst 10% of flights arrived +108 min or later. 0% of flights were cancelled.

Delay distribution

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

ArrivalFlightsShare
Early / on-time1856%
16-30 min13%
31-60 min619%
61-120 min413%
2+ hrs39%

Performance by month

MonthFlightsOn-timeAvg delay
2026-012250%+38 min
2026-021070%+18 min

Performance by day of week

DayFlightsOn-time
Mon540%
Tue683%
Wed667%
Thu560%
Fri540%
SatNo data—
Sun540%

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