Hi. My wife & I want to use points to fly First Class from UK/Ireland/West Europe to Honolulu with 2 week stop East coast USA in New York City/WAS/CLT/ORL etc. IE DUB-WAS-STOP-WAS-HNL. Open jaw in west coast stop OK. Travel originating about 10 June 2017. We have 400K amex points from platinum credit card and also 80k QF points. Do any FF programs allow stopovers to avoid 2 separate sector points tickets?
You could redeem London - Honolulu with Krisflyer flying with United for 165k per person in First Class return. Great way of redeeming with Krisflyer with minimal surcharge. If you book return, you get a free stopover.
Bear in mind most domestic First Class in American airlines are pretty much Business Class if you are more familiar with Business Class in Asia/Australia.