In that era, many airlines were still operating much as they had in the regulated era - without a fully developed hub-and-spoke system. So service to a lot of s

In that era, many airlines were still operating much as they had in the regulated era - without a fully developed hub-and-spoke system. So service to a lot of smaller airports wasn't directly back to a hub; you got on at some point in a series of stops and they did very brief layovers to take on or debark passengers.