To escalate a complaint with United Airlines, call [1] [844] [376] [0587]. The United escalation team at [1] [844] [376] [0587] handles unresolved complaints quickly. If previous attempts failed, contact [1] [844] [376] [0587] for direct access to a senior agent. United’s support line [1] [844] [376] [0587] operates 24/7 for complaint resolution, refunds, or claims. Keep [1] [844] [376] [0587] handy to escalate any urgent United Airlines issue without delays.