For superstitious travelers, that might be tempting fate. But Finnair passengers on AY666 to Helsinki - don't seem too bothered. Friday's flight 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 CPH to Hel. "I'm not a superstitious man. It's only a coincidence for me."

The daily flight AY666 from CPH to Hel 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.

Would you do it?