Hands down, the ultimate red-eye flights are MIA
is too long and the sun is up in either city when you arrive, being that the seasons are reversed). The length of time of the flights is just perfect for red-eye.
You leave EZE
at night and see that sprawling city below you and the freeways... Followed by the darkness of the huge river... Then more darkness with some islands of light, as you cross the argentine heartland with it's many small towns, all while you eat you dinner... And then total darkness as you enter the heart of South America across the Gran Chaco and the Amazon (where sometimes you can see forest fires). During this time you will likely watch the prefunctory movie, play around with the music stations, or just close your eyes.
When you wake up, you're crossing the Caribbean, nothing to see down there so you stare at the tropical clouds below you, the glowing yellow moon above... then the lights turn on the cabin (what a horrible moment for your eyes!), have breakfast, and as you are finishing it the sprawling lights of South Florida approach, the plane descends, the lights turn off, and in no time you land in MIA
I love those flights!
ps- And on MIA
flights in the southern winter, the sun slowly rises to the left of the plane over the totally white snowed Andes... An incredible site, made even more realistic by the fact that when you leave MIA
the air is humid and warm on board, and when you wake up it's A LOT chillier and far more crisp.
You can smell your arrival to the southern hemisphere's winter! Just awesome.