<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by Maddy:
Is there a particular class of service that I'd need to buy on Delta if I wanted to upgrade a paid ticket? I think that might be my best option, assuming I could buy a reasonable ticket to upgrade. </font>
Yes, you would have to buy M class. For a TLV-JFK r/t (slightly longer than the Istanbul haul) the difference between M Class and T Class is usually about $800.