Personally, I go with what's already been said. The travel time takes as long as is necessary for the scene. However, if you do wish to estimate travel time based off of distance, I can tell you (from 1.0) that each of those squares on your map is 100 square yalms, and that there are 1760 yalms in a malm.
So if you take a zone like Eastern Thanalan. The Central Thanalan zone line is at X:8 and the South Shroud zone line is at X:30. So 30 - 8 = 22 x 100 = 2200 / 1760 = 1.25 malms (miles) give or take, because you know you're also not traveling in a straight line and you have to veer off course or follow the road etc. So maybe closer to mile and a half or two mile travel.
Then from there you can estimate how fast it would take you to travel that distance on foot or whatever. But hope this helps! ^^
So if you take a zone like Eastern Thanalan. The Central Thanalan zone line is at X:8 and the South Shroud zone line is at X:30. So 30 - 8 = 22 x 100 = 2200 / 1760 = 1.25 malms (miles) give or take, because you know you're also not traveling in a straight line and you have to veer off course or follow the road etc. So maybe closer to mile and a half or two mile travel.
Then from there you can estimate how fast it would take you to travel that distance on foot or whatever. But hope this helps! ^^
