We did a long northern hemisphere holiday a few years back that involved a lot of different flights and the travel agent beat the best price we could find online. They seemed to have reserved some tickets a while before at especially low prices that they could then pass on to us for less than we could find it ourselves. Hence I used the travel agent. Only thing they could not do was train tickets as well as Ryan air flights to more obscure EU airports. Hence we booked our main long haul flights with the agent and the smaller side trips ourselves as the Ryan air tickets where a lot less than what the agents could offer.