Benefits can consist of an extended network, often realised through codeshare agreements. Many alliances started as only codeshare networks. Cost reductions come from sharing operation facilities (e.g. catering or computer systems), operation staff (e.g. ground handling personnel, at check-in and boarding desks), investments and purchases (e.g. in order to negotiate extra volume discounts).[6] Traveller benefits can include lower prices due to lowered operational costs for a given route, different times to choose from, more destinations within easy reach, shorter travel times, More options of airport lounges shared with alliance members, fast track access on all alliance members if having frequent flyer status, faster mileage rewards by earning miles for a single account on several different carriers, round-the-world tickets, enabling travellers to fly over the world for a relatively low price.[7][8]