I have to travel to EZE for work in Middle of Feb - First week of March. I am allowed to book business, but am supposed to book the lowest fare available (across all major airlines). I am GM on DL, however I would not be opposed to switching programs. Through my job, I can match status to any airline, and since I'm out of LAX mainly, DL doesn't really make sense anymore.

My main question is this, what would you guys do as far as my RT to EZE?

DL - Through ATL - seems to be the best flight times

AA - Through DFW, MIA, or JFK. Anybody know what Business from MIA - EZE would be like? What about the DFW - EZE?

UA/CO - Through IAD or IAH

Lan - Not a "preferred airline" for work purposes so I can't book unless somebody can help me figure out a SCL-EZE/AEP codeshare on AA (the LAX-SCL AA codeshare is showing up)

What would you guys do if you were me? Which business will be the "best" experience (assuming I have to go straight to work when I land). Do either options have a place to shower when I arrive at EZE?

Thanks in advance for your help! I'm very much struggling with this.