I played around with it some more. I tried one-way on January 13 and it says no flights at all TLL-IAD, but if I choose CPH-IAD, I get plenty of options including the direct flight and connecting on the CPH-EWR and ARN-EWR flights. So is it just no capacity on the TLL-CPH and TLL-ARN legs on Jaunary 13, or some IT problem?