Originally Posted by
cameramaker
It depends on your budget, but a return from MAN-JFK in W can be quite competitive, often cheaper than from LHR. You could then use your avios to upgrade to Club World. Or a Y flight out to JFK and then a W return, again, upgrading your inbound to Club World.
Alternatively, if you want the absolute lowest cost option, your avios could book you some really decent accommodation in Manhattan. While you wouldn't be realising the best value/avios, its a way to certainly bring the cost of the trip right down.
As per the above, assuming you have bob on 200k avios, you can get a decent hotel in Brooklyn for 4 nights and a Y flight to JFK and a J return to MAN for a total of £600pp.
Alternatively, you could easily get something really nice in Manhattan for 200k avios for 4 nights.