I'm trying to book a flight in January IAD-TLL-IAD. If I choose a return on Sunday, January 13, there are no flights. Same if I try on other round-trips from SAS US destinations, like ORD-TLL-ORD and EWR-TLL-ORD. I'm trying this on SK's site. Are they really not operating any flights to the US on January 13, or they are all full, or it's just SK's booking website is messed up? (I'm guessing the last one). If I choose January 14, it's fine. The only options I seem to get on January 13 involve a layover in ARN or CPH overnight, and ending up on the January 14th trans-atlantic flight.