How often is UA644 on time?

Across 37 flights on MIA → DEN from 2025-08-01 to 2026-01-05, UA644 arrived within 15 minutes of schedule 89% of the time. The median arrival delay was -10 min, and the worst 10% of flights arrived +14 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

• UA644 on DEN → PDX (312 flights)
• UA644 on DFW → DEN (62 flights)
• UA644 on PHL → DEN (11 flights)
• UA644 on IAD → DEN (21 flights)
• UA644 on SYR → DEN (21 flights)
• UA644 on BNA → IAH (52 flights)
• UA644 on BZN → DEN (1 flights)
• UA644 on SFO → EUG (37 flights)
• UA644 on PDX → SFO (38 flights)
• UA644 on LGA → DEN (31 flights)

Related

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