Lima to BsAs, bus or fly?

I am flying into Lima on the first of july and after a couple weeks need to make my way down to BsAs, Argentina. Anyone done this and had a great time...let me know the best way!!

I've done part of it by bus/train, the part between Cuzco in Peru and Salta in Argentina.
Perfectly doable but for that stretch alone you just need to take some time, and even then you can't see and do everything. I just picked several things I definately wanted to do, which took about 3 weeks. So overland from Lima all the way to Buenos Aires without rushing things too much and seein something on the way will take 4-5 weeks at least. Technically though it is possible in less than a week, if only travelling.

I just wasn't sure about your exact question, sorry.

Cheers!
Michael.

Hello,
Flights to BA from lima will run you at least $400 u.s. one way, if not more ! Taking the bus you have two "main" routes. Go south to arequipa, then south in chile, over to san pedro de atamaca, cross the andes in argentina, to salta , then to BA. thats just a basic route option, with countless stops on the way, all up to you. Or option 2, which is my suggestion, south to arequipa, then into boliva (or to cusco and machu picchu and all that) from la paz down to the border in villazon, then to salta, and to BA. I prefer that simply because bolivia is an intense, beautiful, cheap (unless your american, its $135 to enter the country !!) country. And again countless stops and variations to that route depending on your schedule.
If you are really looking for actual times in a bus from lima to BA, i think lima sells a ticket to BA, it heads the southern route to chile, then east, and its something like a 3 day ride in the bus,, direct.... have fun.

If you can spare the time, there are various routes from Lima to Buenos Aires that take you along many of SA's touristic highlights.

The previous poster has recommend two of them: going via Cuzco and Machu Picchu (rather than straight south to Arequipa) is a third option.

It all depends on how much time you have, and what your objectives are. Please be more specific.