Got a very odd result from Kayak when searching for some flights. It claims that the indirect route, including stop-over time, is faster than the direct one. Is this even possible or an error?
Going direct from YUL to PLS takes 7 hours and 5 minutes while making a 1 hour and 21 minute stop in Toronto shorten the duration to 6 hours and 35 minutes as shown above. Flights all on Air Canada.
Now basic geometry says the shortest path on a plane is a straight line but since the earth is curved, it must not be so but could the difference be so great as to eclipse a 1h21m layover? Notice the return leg has a 7 hour layover, so it is indeed faster to go direct.