15min intervals do not work anymore here. Unless we talk about a route with thousands of pax per day.Nor does the frequency really, I have observed it operating a fleet of Q400s here. For example: http://www.airwaysim.com/game/Routes/Planning/MMUN/KMIA/ (he has 4x A319-A321, I have 6x Q400; he supplies about 150 seats more with bigger planes & less frequency and transports 60% of the pax)But 15 vs 1, he is bound to have more of the marketshare.
I also feel I should point out that you have overlapping flights there, Sami! 1610 and 1630 departures on a 620ppd route
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