From Delta's website (
Fare Info and Ticket Rules):
Basic Economy Fare Features
Delta's new Basic Economy fares are our lowest-priced fares and are available in select markets in the U.S., Canada, Puerto Rico and U.S. Virgin islands. We're able to keep these fares low by limiting certain benefits found in other Delta Economy class fares. For example, Basic Economy fares are non refundable and no cancellations or changes may be made once the ticket is purchased. However, this fare is eligible for Risk Free Cancel and our Same-day Travel Changes programs.
Advance seat selection
Advance seat selection is not available with Basic Economy fares. Seat assignments will be auto-assigned for Basic Economy fare holders during check in.
At only a $15 discount (and seemingly a great deal of advance purchase required), the discount doesn't seem worth the restrictions.
