How often is UA3520 on time?

Across 3 flights on BUF → IAD from 2025-12-28 to 2026-01-04, UA3520 arrived within 15 minutes of schedule 100% of the time. The median arrival delay was -7 min, and the worst 10% of flights arrived -5 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

• UA3520 on RDU → IAD (37 flights)
• UA3520 on EWR → CHS (3 flights)
• UA3520 on CMH → ORD (21 flights)
• UA3520 on ORD → SDF (30 flights)
• UA3520 on ORD → PIT (1 flights)
• UA3520 on EWR → RDU (45 flights)
• UA3520 on ORF → IAD (29 flights)
• UA3520 on BHM → ORD (1 flights)
• UA3520 on SCE → IAD (1 flights)
• UA3520 on ORD → ALB (12 flights)
• UA3520 on ORD → TVC (45 flights)
• UA3520 on ORD → CMH (6 flights)
• UA3520 on IAD → PBI (31 flights)
• UA3520 on SDF → ORD (31 flights)
• UA3520 on EWR → CVG (3 flights)
• UA3520 on ORD → TYS (1 flights)
• UA3520 on BNA → EWR (2 flights)
• UA3520 on PWM → ORD (10 flights)
• UA3520 on ORD → CVG (33 flights)
• UA3520 on ORD → BDL (5 flights)

Related

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