How often is UA3634 on time?

Across 18 flights on BUF → IAD from 2026-02-13 to 2026-03-04, UA3634 arrived within 15 minutes of schedule 72% of the time. The median arrival delay was +1 min, and the worst 10% of flights arrived +239 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

• UA3634 on ORD → BNA (34 flights)
• UA3634 on ORD → MSN (21 flights)
• UA3634 on CVG → ORD (3 flights)
• UA3634 on MLI → ORD (10 flights)
• UA3634 on ORD → ROC (1 flights)
• UA3634 on ORD → OKC (28 flights)
• UA3634 on CHS → IAD (14 flights)
• UA3634 on EWR → BOS (3 flights)
• UA3634 on IAD → BTV (46 flights)
• UA3634 on IAD → ROC (2 flights)
• UA3634 on ROC → EWR (4 flights)
• UA3634 on IAD → ORF (31 flights)
• UA3634 on CLE → EWR (2 flights)
• UA3634 on IAD → BDL (9 flights)
• UA3634 on IAD → RIC (28 flights)
• UA3634 on EWR → ATL (8 flights)

Related

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