Which United ticket classes offer more flexibility?

Visit: https://www.tripmozzo.com/blog....s/united-fare-classe

Flexible United ticket classes typically include standard economy, premium economy, or higher cabin fares that allow easier changes and cancellations. Some United airlines fare types provide refundable options or reduced change fees compared to basic economy tickets. Travelers planning uncertain schedules may benefit from choosing higher United fare classes for added convenience and peace of mind.