From Billund airport fly to Copenhagen airport. 50min $91. From Billund Airport (BLL) taxi to Give st, train to Herning st, taxi to Karup airport, then fly to Copenhagen airport. 3hrs 07min $166. From Billund Lufthavn line 44 bus to Esbjerg st, train to Odense st, then train to Koebenhavns Lufthavn st. 5hrs 26min $57. From Billund Airport (BLL) drive to Kastrup. 2hrs 42min $55.