A rarely discussed fact as well is that there's a monetary difference between AA and US too. You'll make more as a US new hire for two reasons. On the US side you'll start 2nd year pay one year from your DOH, at AA 2nd year pay starts ~14 months after DOH. US new hires also get a 16% company contribution for retirement from day one while AA new hires have to wait until one year on property before they get it. That's not an insignificant amount of money. I'm not sure why the disparity exists but it's there and it's something to keep in mind.