Several cities in Brazil have multiple commercial airports.

Rio de Janeiro:
GIG- Antonio Carlos Jobim (Galeao) Int'l
SDU - Santos Dumont

Sao Paolo:
GRU - Guarulhos
CGN - Congonhas

Belo Horizonte:
CNF - Tancredo Neves (Confins)
PLU - Pampulha

I believe, though, that GRU and CNF are located outside the limits of the cities they are supposed to serve.