How often is AA4521 on time?

Across 33 flights on LGA → STL from 2026-04-12 to 2026-05-20, AA4521 arrived within 15 minutes of schedule 91% of the time. The median arrival delay was -19 min, and the worst 10% of flights arrived +7 min or later. 0% of flights were cancelled.

Delay distribution

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

Performance by month

Performance by day of week

Other routes

• AA4521 on LGA → BUF (89 flights)
• AA4521 on STL → LGA (33 flights)
• AA4521 on BDL → ORD (84 flights)
• AA4521 on ORD → BDL (82 flights)
• AA4521 on BNA → ORD (13 flights)
• AA4521 on ORD → CVG (1 flights)
• AA4521 on PIT → ORD (30 flights)

Related

• All American Airlines flights on LGA → STL
• Compare airlines on LGA → STL
• American Airlines on the return, STL → LGA