Originally Posted by
PsiFighter37
I think it depends on what company you are at. Most of my colleagues fly DL, but a few of us fly UA, and there likely exists a few people who fly AA

Being based in NYC, I suppose it makes sense to give people options, especially because there is geographic preference depending where in the city you live.
agreed. I've been required to use corporate card for expenses but never restricted to a specific airline. Also, many will use the corporate card if they can't afford to float the expenses before getting reimbursed.