It was my knowledge that it was difficult to go lower on prices in any way without losing money? The larger planes could take advantage of economies of scale,

It was my knowledge that it was difficult to go lower on prices in any way without losing money? The larger planes could take advantage of economies of scale, the only way to get lower fares would be to drastically reduce the cost of flying a plane in the first place. No lost luggage, more spacious interiors, and less TSA are always selling points though.