Originally Posted by
ajeleonard
You said it yourself - because the AA flight wasn't a codeshare. It was two separate fares that a third party TA can combine.
No!!!!! It was a single through fare from SVO to SEA, which allowed either AA flight # or AY codeshare flight number on last segment. And second AY agent was able to see it. It's pretty common to have single fare which allows certain segments (usually shorter connections) on partner airlines.
I did not save the full fare rules but if it's still available I will find post.