I am trying to book award tickets for my parents and the flights that I am finding availability are on CO and a NWA partner for the return. But the problem is CO flights do not show up as available on NWA but they easily show up on DL.com. I could easily book it on DL.com alas the return portion is on a NWA partner and cannot be booked with DL.

I am sure others have had a similar experience recently. Is there any way to go around the problem? Would appreciate your help and inputs! Thanks.