Postponing the trip

So, it turns out that the last two weeks in April are Semana Santa in Peru and everything is booked and/or extremely expensive. :-( We are having to postpone it a whole month now! Our flight from Lima to Iquitos, which is 1 hr 40 min went from $80 to $500......ONE WAY! Unless you are Peruvian.  Then, apparently all you have to pay is $69....I wonder if I could pass for a Peruvian.  If I attempt to pass myself off as a Peruvian I will have to be a mute Peruvian because as soon as I open my mouth they will KNOW something is off....HOLA Y'ALL!