Just went in to check my flight prices for my June trip on Delta, and now they have a third column besides Economy and First Class - Basic Economy. Cheaper, but non-refundable, no changes and seats assigned at check-in. Not available on all flights (like it isn't available on the 9:00 a.m. and 11:15 a.m flights). This is my first experience with this, and this wasn't available when I booked my flight. Is this offered when they are trying to fill the plane - although my flight isn't until June so it would seem early to be doing that.