http://www.aerolineas.com.ar/arg/mai...53&idIdioma=en

Please remember that the domestic prices per kilo are priced in pesos. $=Argentine peso, U$S=US dollars.

Time to think about consolidation, stuff in pockets, cargo pants, perhaps a small back pack as your personal item in addition to carry on. Layer your clothes, wear the jacket on boarding, use a small ipod, get rid of items that you may not need or can buy locally. I can do 14 days with my small carryon (admittedly it weighs more than 7kg and only has been caught 3 times in the last 8 years-only in Asia - but YMMV), a 15kg checked bag and a small back pack which I use only if needed. Even MarshaB can come close.

And do not expect LAN Argentina to be any better except they normally fly their routes. They definitely check weight in Salta, AEP and Mendoza.

Otherwise, just pay up.