I was looking to price up LHR-JFK-SFO return in mint on all legs and all it would give me was economy.

This was after using the multi trip options to have LHR-JFK on day 1 and JFK to SFO on day two. No issue with coming back on the same day as the schedules allow that and I was given an economy price just not a Mint price.

Here I am prepared to consider switching from BA and AA for my US trips to Jet Blue and they won’t even give me a price!