Originally Posted by
Deadbone
I don't know anything about a letter. If you get referred you may or may not get an interview. Now that the process is centralized they may send a letter. You get invited to travel to Denver on your dime. If you get an offer it will be contingent on passing a sim eval, again in Denver. That trip is on their dime.
FYI, I did my ride down in DAL@ Higher Power Aviation on the 737-400.