Long story short - I'll be flying Delta in May from IAD to BCN (IAD>JFK>BCN). I was booked in H and K as part of a package vacation deal that was given to me. After talking to the travel agent, it looks as though they ran a promotion to similar travels for a relatively cheap upgrade to business. The promotion has ended and business is booked completely on my return and near full on the outbound. I want to upgrade my outbound H into Y, B, or M and use 25k miles for the upgrade.

Is there any way to view the cost of upgrade, from H to Y/B/M, on that one specific leg, without calling Delta? I'd like to check daily, but I don't want to be a pest. I've searched, but can't find anything that will let me get that detailed.

Thanks in advance,