Flight 666 to 'HEL' on Friday the 13th ends after today Finnair’s flight AY 666 went to Helsinki.

 -- Friday the 13th may spark dread for the superstitious. And for many people, the number 666 is associated with the devil based on the book of Revelation in the Bible.

But for 11 years some airline passengers have flown in the face of any such fearful associations -- taking Finnair’s flight AY 666 from Copenhagen to Helsinki, which has the airport abbreviation “HEL” -- on Friday the 13th.

The airline tweeted today that the flight landed safely in HEL.

Finnair also announced that today would be the last time a flight of that number would fly on Friday the 13th. Asked why by a customer on Twitter, the company said it was retiring the "666" flight number because the airline is growing and adding more numbers. Finnair also noted that it still has a flight from SIN (the code for Singapore's airport) to HEL.