How can I upgrade my United Airlines flight?

To upgrade your United Airlines flight, log into your reservation, select the Upgrade option, and review available premium cabin options and associated costs. Alternatively, use earned miles or Premier status for complimentary upgrades. At the airport, inquire about paid upgrade offers at check-in or the gate area if seats remain available. For further information about United Airlines Upgrade Flight contact the helpdesk at 1 (800) 864-8331 or 1 (888) 609-1015 (OTA-Skip Waiting). Or visit the Airlines Group Travel site.