Flight time duration prediction based on distance

Given a table of flights with their origin, destination, and flight time, we would like to estimate the length of a proposed flight from Bratislava, Slovakia, to Amsterdam, the Netherlands:

Origin	Destination	Distance in km	Flight duration	Flight duration in hours
London	Amsterdam	365	1 hr 10 m	1.167
London	Budapest	1462	2 hr 20 m	2.333
London	Bratislava	1285	2 hr 15 m	2.250
Bratislava	Paris	1096	2 hr 5 m	2.083
Bratislava	Berlin	517	1 hr 15 m	2.250
Vienna	Dublin	1686	2 hr 50 m	2.833
Vienna	Amsterdam	932	1 hr 55 m	1.917
Amsterdam	Budapest	1160	2 hr 10 m	2.167
Bratislava	Amsterdam	978	?	?

Analysis

We can reason that the flight duration time consists of two times—the first is the time to take off and the landing time; the second is the time that the airplane moves at a certain speed in the air. The first time is a constant. The second time depends linearly on the speed of the plane, which we assume is similar for all of the flights in the table. Therefore, the flight time can be expressed by...