Originally Posted by
Kangol
Thanks, I understand the notation, x = <24 hour transit which is what I meant and intended. So in my example, origin to destination would be HKG to JFK.
o = stop (>24 hours), which is sometimes (often) left out.
Formally, an O in the “X/O” column on the ticket is used to signify a city that is optionally a stopover. i.e., the flight coupon could be revalidated as a stopover without a fare recalculation. I don’t think it ever appears in the horizontal calculation. These days it probably doesn’t have much meaning.