Not ideal in a Q400 but as other posters have said, the aircraft has the legs. Flybe use the Q400 on MANMXP occasionally at 730nm and have used on EXTMJV before at 900nm. The aircraft also regulary does BHD-SZG every weekend during the winter at 940nm.
Granted I'd not necessarily want to be in a Q400 for that long but if they think they can make money with it then they might just give it a go!