There can't be too many airlines that meet both criteria. I'm not aware that
CX, or MH have tried transits before. Have GF?
Its MH.
They are currently undertaking a feasibility study for a KUL-JFK route via either MAN, ARN or BRU.
They have served MAN before, and they also ran a KUL-ARN-EWR flight.
Like I say, very early stages, and there's probably more chance of the route not happening as opposed to happening, but, thought I would share none the less in the absence of any new solid route news after the last Ryanair announcement.