Originally Posted by
panlukasz
I would suggest to check first if there is business available at all. I just had a look on two dates (12th of April and 13th of July) and there is only economy available.
There is no business class on ATH-JTR flights ever, not on the dates indicated, neither any on other date!

.
And as for the duration of the flight, as indicated by
djjaguar64, 50 min. is slightly exaggerated: it's more like 25-30 minutes...