Entering Brazil by air, leaving by land, will I be denied entry?

I've just read this question

Travelling to Brazil without return ticket

which suggests that I will need to prove that I am leaving Brazil before the 90-day visa expires. If I was planning on leaving Brazil overland, how does this work? How do I prove my plans to go to Argentina by bus? Will I be denied entry, unless I have an air ticket out of there?

Best Answer

The majority of international airlines sell return tickets for a price similar to that of one-way tickets (see the Wikipedia article on the subject), so you wouldn't lose any money by buying a return ticket initially.

For example, a flight from London to Rio costs $886 when purchased both-ways and $1117 when purchased one way, saving you $231 and lots of headache when trying to prove your good intentions to the authorities.