Hi everyone, I'm struggling today to purchase a ticket on DL/KLM.

This issue has persisted now for 12+ hours...

On DL.com, KLM.com, even kayak, I see routes and fares in K,U, and T available and priced at $1,723.10 or less. But on Delta, on the final confirmation screen, the fare jumps to $6100!! On KLM.com, it simply states seats are not available.

I've spent 1.5 hours with three Diamond reps. The third was extremely sympathetic and helpful, yet could not book a seat. She said her "low price" search also showed $1723.10, yet KL is not making seats available in buckets other than Y or M. She said she can see the seats are clearly available, yet we just cannot book them.

It doesn't seem like this is a normal price hike, Delta implied that it is some type of fare code alignment issue and should resolve. In the meantime I can't book and am becoming concerned.

My question is, does anyone know any other workarounds on this? Any suggestions?

My intended travel is:
Jan 8: STL-NBO
(depart STL 14:05 via DTW+AMS, arrive NBO Jan 10 20:40)
Jan 21: ADD-STL
(depart ADD 23:30 via AMS+DTW, arrive STL Jan 22 13:30)

My issue is not unique to this open-jaw request or my specific dates. A simple STL-NBO round trip with similar dates is also unable to be booked via delta.

Sorry for the long post, I would appreciate any insights. Thanks!