I'm embarrassed--I didn't scroll down the page far enough. Looks like there are no flights from Guatemala to NYC. No problem, I'll just travel farther north to Mexico City and go to NYC from there. But wait... I try Mexico City in the validation tool and it still says that there are no routes. It works if I put in Cancun.

Is the OneWorld map up-to-date, or is there a bug in the validation tool?

Also, I'm still interested in suggestions for my other questions. Thanks so much! :-)