Wow...thanks for finding this! I booked JFK-BCN over and LHR-JFK return as I am going to spend 30 days in Europe next May traveling around. It priced at $3588 but I went to Amex Travel as I still get the 50% rebate on points. They had an "insider deal" for the same route and I had to pay 336,000 Membership Rewards Points and then I will be rebated half of that. 168,000 MR Points for the roundtrip!