Upgrading on Delta but ticketed by Virgin miles.
We are booking 2 tickets through Virgin for travel on Delta from KEF to JFK next year. Delta has no saver seats for Business for our dates next June. In fact when I check the entire schedule there are no saver Business seats
Will we be able to use points/cash to upgrade to Business at a later time.. Also will Delta/Virgin offer us a cash upgrade option that we might choose to take advantage of??