Consider this very unofficial and subject to operational changes, but the JetBlue A321neo now appears in the carrier’s schedule for domestic operations. The company has previously announced that the plane will operate from JFK to Guayaquil starting on 5 December 2019, so in that sense the cabin layout is already known. But getting on board during the earlier operations is less certain.
It is not easy to find; the display on the JetBlue website does not identify the A321neo differently than the A321/Core config.
Moreover, JetBlue is not filing the type differently to GDS platforms right now. That makes some sense given that it is a 200-seat aircraft the same as the A321ceo frames the company has flown for years now. There are differences on board. The cabin layout is a little different thanks to the Airbus Cabin Flex design that removes the exit forward of the wings. Some of the behind-the-scenes details in the IFE/C system can vary as well. But for most scenarios the lack of differentiation matters to the airline, not customers. As such, the filings remain common for now.
But, at least for now, the aircraft is showing up on flight 1701 JFK-FLL on 24 September 2019. Maybe it will carry passengers sooner than that, maybe not. Maybe it will get swapped out from the schedule on that flight. But it is there right now. It is also scheduled to operate on B6 1202 northbound back to JFK that same day. And it remains scheduled on that pairing for at least a week. Double-check the seat maps if you’re booking in hopes of scoring a seat on the new config. This also seems like a situation where the no-change fee benefit of the Mosaic program could come in handy, just in case things change.