Originally Posted by
Mizunara
1. It needs to be booked in booking class J/C/D/I. For HND-JFK the cost will be 45,000 miles. More details here.
https://www.jal.co.jp/jp/en/jalmile/use/jal/upgrade/
2/3. The easiest way to look would be to go to your reservation on JAL's website, scroll all the way down, and look for an Upgrade button on the bottom right. Go through the flow there and you'll see whether there's space available or if you'll be waitlisted for an upgrade seat.
Thanks for your help! I looked at my reservation on JAL’s website and scrolled all the way down to the bottom right. Unfortunately, no such button exists for me. I’m wondering to what degree this is the result of me booking my ticket through AMEX Travel. Then again, the ticket is on JL stock and the JFK-HND segments are JL-marketed/operated.