CLOSE On the morning of Friday the 13th passengers boarded the last ever Flight 666 to HEl. Buzz60 Finnair has flown it's AY666 to HEL 21 times on Friday the 13th over the past 11 years. Finnair's Flight 666 just made its last trip to HEL on Friday the 13th. AY666 will officially change to AY954 on Oct 29, according to the airline. Don't worry, the airline still offers a flight from SIN to HEL, Singapore to Helsinki of course.