2hr 55min on a Dash😱? No thanks
The Q400 is operated on routes of this length all over the World (look in the US, Africa and Australia) and closer to home with Flybe who use it on sectors approaching this length (SOU-ALC for example).
That's because it is fast (for a turborprop), economical (so the bean-counters like it) and reasonably quiet and comfortable (from my experience) to fly in.
The days of "it is has props, so must be old, noisy and uncomfortable" are long gone.