Do we pay for the journey or travel when traveling in a taxi? by plane?

When traveling in a taxi, the distance between the point of departure and the point of destination may be small, however, due to the peculiarities of traffic (road closed, one-way line and long-distance U-turn, prohibited stop), a taxi can travel a distance much longer than moving. Therefore, in a taxi, we pay the way.
The plane has no problems with the choice of the trajectory of movement, it always moves along the shortest path between the points of departure and destination, since there are no restrictions in the airspace. Therefore, on the plane, we pay for the transfer.