i rewatcehd s16 finale episode.
begining of the ep is phil giving detail about the area they just did leg 11 in (in this case hong kong) and then it shows teams departing frm the pitstop ripping open their next clue (likely to head to the airport for a plane ride to ____________)
time advantages carry over at the pitstop but it doesnt really matter since they all will meet up at the airport for 1 plane.
Then when the plane lands they begin the finale leg.
the twins on s16 were smart and asked to be moved to first class of the plane when the other 2 teams were sleeping so they got out first and a big lead.