Is the criterion for travel distance or time?

The questioner:
We traveled from Jizan to the island of Farasan by boat, and the passenger prayed the midday and afternoon prayers combined and shortened, knowing that the distance does not exceed forty kilometers, but the duration of the trip is more than three hours. Is that permissible?

The Shaykh:
The distance for shortening the prayer is what reaches two stages for the mount. That is determined by approximately eighty kilometers. Each stage is forty kilometers. The two stages, therefore, are approximately eighty kilometers. This distance mentioned by the questioner is short. Shortening the prayer and breaking the fast in Ramadan are not permissible at this distance according to one of the opinions of the scholars.

The presenter:
Okay, okay.

The Shaykh:
So it was obligatory to complete the prayer, to complete the prayer at this distance. The days mentioned by the questioner, the three days, have no bearing on this; the discussion is about the distance. If it is eighty kilometers or more, shortening is permissible; if it is less than that, it is not permissible. Yes. May Allah bless you.

The questioner:
In fact, if you would be so kind, Shaykh Salih says that the duration is three hours, even though the kilometers are forty.

The Shaykh:
Likewise. Time is not the criterion; according to this opinion, time is not the criterion; the criterion is the distance. Yes.