I can only assume that the software that looks up the flight code failed to find a destination, or the object is malformed - so in the absence of any destination is just reads “Mystery Flight”.
no actually I think there are mystery flights that dont tell u where ure going so its a surprise but tell u what places it could be so that u know what documentation u might need and stuff, I saw a warning about that on the page of the last airline I used saying something like “if u take a mystery flight make sure u have all the documentation ready for any of the possible destinations”
yeh I guess so, I didnt ask if that was a joke