How often is UA5559 on time?

Across 34 flights on COS → DEN from 2026-05-22 to 2026-06-24, UA5559 arrived within 15 minutes of schedule 91% of the time. The median arrival delay was -20 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

• UA5559 on DEN → GJT (41 flights)
• UA5559 on MKE → ORD (45 flights)
• UA5559 on ORD → LIT (5 flights)
• UA5559 on BTR → IAH (1 flights)
• UA5559 on GRB → ORD (10 flights)
• UA5559 on BIS → DEN (31 flights)
• UA5559 on IAH → OMA (1 flights)
• UA5559 on ORD → MCI (16 flights)
• UA5559 on ORD → PWM (16 flights)
• UA5559 on HDN → DEN (137 flights)
• UA5559 on SHV → IAH (1 flights)
• UA5559 on ACV → DEN (14 flights)

Related

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