I didn't know Flagship check-in had some specifics for EXP which is:
You can use Flagship® First Check-In if you’re flying on qualifying international flights operated by American (regardless of cabin).
Qualifying international flights
Flights with seats ticketed as Flagship® between the U.S. and:
Asia
Australia
Europe
New Zealand
South America (excluding Bolivia, Colombia, Ecuador, Guyana, Peru, Suriname and Venezuela)
So LAX-HND, regardless of whether it's econ, PE or J, can use Flagship check-in at LAX as long as they're EXP? Do I understand this correctly?
edit: flight is on AA metal