Etihad Airways allows eligible passengers to upgrade their seats to the premium cabin class. Moreover, the airline offers several modes to do so. Passengers can use options such as purchasing an upgrade directly, placing a bid through the upgrade auction system, or redeeming Etihad Guest miles to Upgrade Etihad Seat from economy to business or business to first class. For more details related to flight upgrades, contact the customer service of Etihad Airways or follow the link shared.