How often is UA1181 on time?

Across 6 flights on IAH → PHL from 2026-05-21 to 2026-05-31, UA1181 arrived within 15 minutes of schedule 67% of the time. The median arrival delay was +9 min, and the worst 10% of flights arrived +53 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

• UA1181 on LAS → IAH (270 flights)
• UA1181 on DEN → FAI (1 flights)
• UA1181 on IAH → IND (20 flights)
• UA1181 on IAH → SFO (37 flights)
• UA1181 on IAH → DCA (55 flights)
• UA1181 on IAH → FLL (31 flights)
• UA1181 on DEN → ORD (37 flights)
• UA1181 on IAH → AUS (14 flights)

Related

• All United Airlines flights on IAH → PHL
• Compare airlines on IAH → PHL
• United Airlines on the return, PHL → IAH