Fare class U is a revenue fare/booking class of service that is marketed as Main Cabin on Delta Air Lines mainline and code share flights. This fare class is considered a deeply discounted main cabin fare class that is eligible for complimentary upgrades.

Also referred to as: Booking Class U, Booking Code U, Fare Class U, Ticket Code U, Class U, U Fare or Main Cabin (U)

Delta Fare Class U Frequently Asked Questions