I read somewhere on this forum that someone purchased a ticket from LAX to Buenos Aires and back for about $400. I can't seem to find the post again. Does anyone remember that post or know where this price can be found? Sounds great, doesn't it?
Yes it was a Mexicana deal -- prices may not be the same right now, and it always comes down to what dates your flying / how long you're staying. Try www.mexicana.com, or kayak.com to see multiple airline offers at once.