Originally Posted by number_6
It might be seasonal (AA might have single flight number service YVR-DFW-MEX and MEX-DFW-JFK, for example). You'd have to locate the specific flights (also it may not operate daily).
YVR-MEX is LA5095* operated by Mexicana in the one world planner. It operates Tue/Thu/Sat throughout the year it looks like.
The MEX-JFK is AA 8212* operated by Mexican as well.
Are these flights valid on one world RTW ?