Fare class NK is an award (miles) 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 award main cabin fare class that is eligible for complimentary upgrades.

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

Delta Fare Class NK Frequently Asked Questions