For escalating a complaint with United Airlines, call 1-𝟠𝟘𝟜-𝟠𝟝𝟛-𝟡𝟘𝟘𝟙 and ask to speak with a supervisor. If necessary, escalate the issue through their website contact form or social media platforms. To escalate a complaint with United Airlines 1-𝟠𝟘𝟜-𝟠𝟝𝟛-𝟡𝟘𝟘𝟙, you can initially contact their customer service through their online contact form, by phone at 1-𝟠𝟘𝟜-𝟠𝟝𝟛-𝟡𝟘𝟘𝟙 or +1-𝟠𝟘𝟜-𝟠𝟝𝟛-𝟡𝟘𝟘𝟙, or by mail and if you are not satisfied with the response, you can request to speak with a supervisor.