For those based in Latin America, there are actually some interesting opportunities for "Intercontinental" flights with Copa to complement the required points for SEN.

For example Bogota-Panama-Quito (or Lima or others) and vv. yields 4 IC segments and 800 points at a very reasonable price. With this small weekend trip one gets to 40% of the Senator qualification (granted, they are not qualifying points, but they are still useful for SEN).