There are several ways to get a hold of United Airlines:

By Phone Call: You can reach United Airlines by phone at 1-800-864-8331 (U.S. and Canada).
Through the website: You can also contact United Airlines through their website at www.united.com. Go to the "Contact Us" page and select the appropriate topic to get assistance with.
Social media: United Airlines has accounts on various social media platforms, such as Twitter and Facebook. You can send them a message or tweet with your question or concern.
By United app: You can download the United app on your smartphone or tablet, and use the "Contact Us" feature to reach out to the airline's customer service team.
Through Airport customer service: If you're already at the airport, you can visit the United Airlines customer service desk or the ticket counter for assistance.

Visit the following URL for a detailed description of each of the above methods: https://www.travoflies.com/blogs/how-can-i-get-a-hold-of-united-airlines