FYI, I called again tonight and got the same story. Except I've learned it's Tyrolean Airlines, not Lauda. Still, though, though it has an OS flight number.

I've sent an email to US Airways and will likely call them tomorrow (not the reservation line). If anyone who has their miles with another airline happens to have a free moment and can call, would you mind just asking them if KLU is a valid destination on your *A carrier? I'd be curious to see if it's valid for some but not others. i.e. Some pigs are more equal than others!

Thanks.