Fare class U is a main cabin discounted revenue fare class on Delta Airlines mainline and code share flights.
Fare class ranking
Higher Fare Classes
Lower Fare Classes
Upgrade probability is based on fare class ranking and medallion status. These calculations are estimates only and should be used as a general idea of ranking for upgrades at the gate. All complimentary upgrades are based upon inventory availability.
These calculations are not endorsed or provided by Delta Airlines.