Who would prefer not to fly in business class? Depending on their Premier® status level, passengers can upgrade to business class on the majority of United Airlines and United Express-operated flights. To explore United Airlines seat upgrade options, travelers can log in to their account on the official United Airlines website and enable 'expert mode' to check upgrade availability. Whether you're looking for extra comfort, priority boarding, or premium in-flight services, United offers multiple ways to upgrade. If you require additional information or immediate assistance with flight ticket upgrades, please contact United Airlines customer service. If you need more information or quick assistance with flight ticket upgrades, feel free to anytime contact 1-888-843-8860 for details.