I really doubt that Kent & Vyxsin get a flight penalty as penalties are usually given for things that give you an advantage. And for them there was no other option available.
It sounds much more like a Marked for elimination penalty which would hit at the next Pit Stop.
What season was it (I think 9) where teams took the wrong route, but the route actually took them longer, ie no time gained. This was when they still did the 30 minute penalty +/- time gained or lost.
Was that the damn Greece leg again, that both Lake & Michelle and BJ & Tyler drove for hours int eh wrong direction. One team got booted the other went on to win the damn race.