Originally Posted by ADLFO

This is for a DL Reserve Certificate. When I went to Redeem Your SkyMiles Companion Certificate here, it prompted me for the Certificate Number which I entered. It then went to a second screen requesting my Last Name and SM number which I also entered successfully. Then it sends me to a page for requesting flights using the companion cert. I enter the origin/destination and dates and get this message:

The cabin class entered is not valid for this eCoupon or Certificate offer.

The only thing is, there is no cabin class choice on the flight request page. Further, the cert is good for certain fare classes in both the F and Y cabins.