The topic of Distances in the South is a topic of great interest to the Flat Earth Community, as its proposed models predict that the lines of longitude south of the equator will either converge or diverge. According to multiple-pole models with an Antarctic continent the lines will converge (See the Bi-Polar Model). According to the classic Monopole model the lines will diverge.
On the topic of sea travel, we find that sea travel in the South may have been historically difficult.
There are several potential variables and issues in analyzing air travel for accurately determining the geography of the Earth under the various geographic models in discussion.