How often is UA4188 on time?

Across 12 flights on GSO → IAD from 2026-05-01 to 2026-05-18, UA4188 arrived within 15 minutes of schedule 100% of the time. The median arrival delay was -20 min, and the worst 10% of flights arrived -17 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

• UA4188 on IAD → DAY (6 flights)
• UA4188 on GRB → ORD (35 flights)
• UA4188 on IAD → PVD (8 flights)
• UA4188 on PVD → IAD (1 flights)
• UA4188 on CVG → EWR (32 flights)
• UA4188 on AVP → ORD (12 flights)
• UA4188 on SDF → ORD (55 flights)
• UA4188 on EWR → PWM (37 flights)
• UA4188 on ORD → MLI (68 flights)
• UA4188 on ORD → GSO (18 flights)
• UA4188 on DAY → ORD (17 flights)

Related

• All United Airlines flights on GSO → IAD
• Compare airlines on GSO → IAD
• United Airlines on the return, IAD → GSO