Thanks for the continued advice and suggestions.

One quick query if I decide to LAS-xDFW-xYVR-xJFK-MIA, will 2:20hrs be enough to transit at YVR.

Looking through search on past posts I will need to exit through immigration/customs and check back in.

Is it possible and will immigration allow me to do this? I hold both US and British passport and only have carry-on.

One other question: If I miss the flight is it a basic re-book (date change) via the AA desk/phone?

Thanks,

J