When you open the map, you can see that all available flying points are blue and yellow, in which the blue flying point is exclusive to the camp and belongs to the tribe or alliance, while the yellow flying point in the yellow circle is neutral, that is, both the alliance and the tribe can be used. The flight points of hostile camps are generally in the camp, so it is impossible to use the flight controller NPC when you see red.
Extended data
Warcraft flying point rules
1. The map where the main city is located has no flight points except the main city.
2. Most maps have at most one flight point in a camp, except for the following situations:
1) Tribe has two flying spots in Thorn Valley (Grogo and Treasure Bay are not neutral flying spots, but only distinguish the allied tribes);
2) The tribe has two flying spots in the barren land (crossroads, Taurazu camp, and a neutral flying spot was added in a version of Ratchet City);
3) The tribe has two flying spots in Grey Valley (Wood Chopping Outpost and Zoram Outpost);
4) The Alliance has two flying spots in Fieras (the map of Sarannal is located at the junction of Qianzhen Stone Forest and Fieras, which belonged to Fieras before the disaster).