What do red circles mean?

[Chris_S]

It can be found in the Infinite Flight FAQ thread

Reading Airport Dot Colors

Today we will be covering an important feature in Infinite Flight that provides us a ton of information, whether we’re sitting on the ramp planning a flight or enroute to our destination. The Airport Color Dots come in handy as we’re nearing our destination. Staying ahead of the aircraft in crucial to ensure that things are running smoothly and that you’re not caught off guard should something unexpected happen. Part of the preplanning process for your arrival should be checking the weather at …