I haven't found yet what the best public transit sites are for going from Copenhagen to Lund. Does anyone know what the bus or train website is, and which would be better, bus or train? Is it important to get tickets in advance?
By train it is a regional train run by Øresundståg www.oresundstag.se. On regional trains there are no discounts for buying in advance or seat reservations, so you can buy the ticket on the day of departure.