8 days ago we travelled from Bulgaria to Turkey by coach. We found information on line saying that the travel time could be 7, 8 or maybe 14 hours depending on the border crossings & traffic. For this reason we didn't book any accommodation but did note down the address for a hostel which had competitive rates, ace location & great reviews. It also had a 30 bed dorm room. Which we would later count & come to the magic number of 34 beds. It took 2 coaches, 2 tube rides & ages walking around with crap directions to come to a total travel time of 13 hours. If we exclude the waiting times for buses & the time it took to get to our hostel so just the Bulgaria to Turkey bit, I would estimate a 9 hour journey.