For passengers on one flight, it was one creepy Friday the 13th coincidence.

Finnair Flight 666 took off from Copenhagen around 1:07 p.m. local time and landed in HEL, or or Helsinki Airport in Finland, at 3:41 p.m. local time, according to Flight Aware.

It's unclear if it is truly a coincidence or the airline Finnair was having a little fun, but it certainly is a bit spooky on Friday the 13th.

According to The Guardian, this is not the first time this has happened - on Friday 12, 2013, a Finnair Flight numbered 666 also flew from Copenhagen to Helsinki.