Finnish and Danish airline passengers aren't particularly superstitious, or this flight would be empty. On the contrary, Finnair flight AY666 bound for Helsinki (code HEL) is almost full.
"It has been quite a joke among the pilots," said veteran Finnair pilot Juha-Pekka Keidasto, who will fly the Airbus A320 from Copenhagen to Helsinki. "I'm not a superstitious man. It's only a coincidence for me."
The daily flight AY666 from Copenhagen to Helsinki falls on Friday the 13th twice in 2013. Friday the 13th is considered bad luck in many countries and the number 666 also has strong negative biblical associations.
The forecast for the flight is for calm skies over the Baltic. Link -via reddit
Followed by the apocalypse and scattered misc. plagues.