Delta Airlines First Class Upgrade Policy: What Travelers Should Know The Delta Airlines First Class Upgrade Policy allows eligible passengers to move to a higher cabin class based on seat availability and fare rules. Upgrades may be available through loyalty status benefits, miles redemption, upgrade certificates, or paid offers. The airline typically prioritizes frequent flyers and premium fare holders when assigning complimentary upgrades. Travelers can also purchase upgrades before departure or at check-in if seats remain available. Checking upgrade eligibility early and monitoring available offers can increase the chances of enjoying a more comfortable and premium travel experience. See More: https://www.flyingpolicy.com/seat-upgrade/delta-airlines-first-class-upgrade-policies#Delta_Airlines_First_Class_Upgrade_Policy_for_Space_Availability