How often is UA4637 on time?

Across 37 flights on BIL → DEN from 2026-01-06 to 2026-02-11, UA4637 arrived within 15 minutes of schedule 84% of the time. The median arrival delay was -10 min, and the worst 10% of flights arrived +39 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

• UA4637 on ATW → ORD (7 flights)
• UA4637 on COS → ORD (35 flights)
• UA4637 on IAH → SHV (21 flights)
• UA4637 on BTR → IAH (78 flights)
• UA4637 on AMA → IAH (3 flights)
• UA4637 on CRP → IAH (23 flights)
• UA4637 on PSC → SFO (1 flights)
• UA4637 on DEN → PIA (21 flights)
• UA4637 on DEN → TUS (69 flights)
• UA4637 on DAY → ORD (1 flights)
• UA4637 on AVL → DEN (1 flights)
• UA4637 on BOI → DEN (68 flights)

Related

• All United Airlines flights on BIL → DEN
• Compare airlines on BIL → DEN
• United Airlines on the return, DEN → BIL