Travel by Walking

Hi,

I'm thinking about how long it would take approximately to walk between two kingdoms or cities. I need such measurements because I need to plan ahead for D&D sessions for the players and the other logistical requirements for armies that travel between them.

Here are the numbers I calculated. AvgH is average human. AvgA is average adventurer (D&D walking speed), and it is based on 5 foot/s while AvgH is based on 5km/h. The numbers are based on modern driving routes.

AvgH walk speed: 5 km/h = 1.388 meter/s = 4.553 foot/s = 16390 foot/h AvgA walk speed: 5.486 km/h = 1.52 meter/s = 5 foot/s = 18000 foot/h

Paris-Berlin: 1100 km AvgH: 220 h, no rest. AvgA: 200 h, no rest.

Ankara-İzmir: 590 km AvgH: 118 h, no rest. AvgA: 107 h, no rest.

In such two example cases, how long would it take for a group of adventurers, in your opinion, to travel between them? How long would an army take to travel between them? What logistical obstacles would they need to tackle?

Do you think there is anything else that needs to be mentioned when thinking about such things?