Originally Posted by
JohnAx
Funny how they always mention Canada. In practice travel between the U.S. and any of the countries in the zone including Central America and the Caribbean enjoys the same privilege.
I don't think so, it is just that most of us don't do US originating rtw and so don't run into this problem. If you did do a US originating rtw you could not do DFW-MEX-DFW-FRA...ORD-DFW-MEX-DFW but you go from the US to Canada as many times as you want. For US originating rtw one of the arrivals/departures must be a transit without stopover for a country other than Canada.