Depends!Kind of and kind of not.
Dang Doug! With an answer like that, you could be a perfumed prince of the 4th floor!
At Eagle, I get to fly on AA and code shares for taxes only. After 6 months I get Zed fares on any airline.
Isn't it a yield fare on both until 5yrs of service?
It was like $30 or something from Tuscon to Dallas when I worked there--that's about what a one-way yield fare on Delta was for my "travel companion" before we got married. I spent 200-300 a month commuting because agents usually give you a jumpseat pas with seats open in the back. It sucked to have to pay on your own airline.
Where can you get an id90 ?
From your airline...or the mainline partner. At Skywest, we get ID90's through Delta only (and you have to purchase them at a ticket counter). That screws things up if, say, you're taking United from Moscow-Domodedovo and United cancels, with American or British Airways your only options--but both require an ID90, and Delta flies only out of Sheremetyevo 60 miles away. Oops.