How often is UA1156 on time?

Across 116 flights on STL → ORD from 2025-07-01 to 2025-10-25, UA1156 arrived within 15 minutes of schedule 61% of the time. The median arrival delay was +10 min, and the worst 10% of flights arrived +75 min or later. 2% 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

• UA1156 on LGA → ORD (94 flights)
• UA1156 on ORD → SAN (21 flights)
• UA1156 on IAH → LGA (21 flights)
• UA1156 on ORD → PSP (45 flights)
• UA1156 on PHX → ORD (24 flights)
• UA1156 on ORD → RSW (38 flights)
• UA1156 on IAD → PBI (37 flights)
• UA1156 on ORD → CVG (2 flights)
• UA1156 on ORF → ORD (16 flights)
• UA1156 on LAS → DEN (36 flights)
• UA1156 on DEN → ORD (6 flights)
• UA1156 on ORD → FAT (37 flights)
• UA1156 on ORD → MSY (48 flights)

Related

• All United Airlines flights on STL → ORD
• Compare airlines on STL → ORD
• United Airlines on the return, ORD → STL