hey, so i am currently travelling around the world on my gap year and on friday i fly from lima to sao paulo. i was then going to spend 2 weeks in rio but have heard that it is rainy and i want some sun so am trying to find a way out to some sun.

i have heard that i may be able to get a frequent flyer pass and therefore perhaps get a cheaper flight to central america return.

i have my boarding passes for:
london - la with ba
la - mexico city with aeromexico
mexico city - cancun with aeromexico
cancun - guatemala city with taca
san jose - lima with taca

and i am flying with lan to sao paulo from lima on friday.

i would like to fly from either sao paulo or from rio to central america but will need a return flight as i will be flying home from rio.

so i was wondering if anyone knew if this would be possible and if so what airline i should get the frequent flyer with etc.

thanks, kerri xxx