Show what airport or city code to choose for a location to get the lowest fare. Show the "hubs"
Currently, when I select a big city, I might see several options for that city and I need help choosing which option is best. Sometimes an option is a hub airport instead of a tiny airport. Sometimes the option is a city code and not an airport.
For example: Moscow and Beijing.
We have city codes now! Check out NYC and LON for examples.
Adam Seper commented