FSXcenery just released Mariscal Sucre (ICAO: SEQM). This is the new airport for Quito and opened in February 2013. It replaced the old Mariscal Sucre International Airport and is located about 18 kilometers from the city. It is the busiest airport in Ecuador with about 220 weekly flights and will give you plenty of options to choose a great flight.
The scenery is available for FSX and P3D. The airport includes seasonal textures and moving jetways. You can get the scenery here. All the money ea!rned by this scenery will go to an animal shelter!
You can buy it from SimMarket for 16.40 euros.

