Is there a thread discussing the 25,000 companion award cert? Point me to it if so because I certainly need help.

Both my husband and I have the awards. Today was my first attempt to use it. Foolish me, I found it requires a round trip ticket. I don't think I have ever booked a round trip international ticket. I grab seats when I can find them, always one way, and then search over weeks or months til I find the return. Yes, I know the Ts and Cs say "Valid for one-way or round-trip itineraries in any class of service and itinerary available for Atmos Rewards award redemption on Alaska Airlines, Hawaiian Airlines, or Alaska's global partners including the oneworld Alliance." But the website thought otherwise.

I really should read the Ts and Cs before griping. Apparently it's only good on Alaska and Hawaiian. I can't use it on the massively inflated partner awards.

Routes: Valid for award redemptions systemwide on eligible Alaska Airlines, Hawaiian Airlines, and partner flights as available at AlaskaAir.com.

Yet, Ts and Cs also say:

Valid for one-way or round-trip itineraries in any class of service and itinerary available for Atmos Rewards award redemption on Alaska Airlines, Hawaiian Airlines, or Alaska's global partners including the oneworld Alliance.

Perhaps I can find award space from SAN to Mexico, such as Cabo?? Has anyone tried that?

So:
Can I use one way? Who has been successful?
Can I use on partners? Who has been successful?