I once flew back from Costa Rica to Zürich via Miami, because I wasn't aware that unlike every other airport I have ever been, the US doesn't do transit. Since

I once flew back from Costa Rica to Zürich via Miami, because I wasn't aware that unlike every other airport I have ever been, the US doesn't do transit. Since that horrific day I never went to Latin America via the US again, no matter how much cheaper it would have been.