Originally Posted by
totti
Thanks for the input- I was not considering LHR-MAD-JFK. I will fly ex-Europe and have to connect either in LHR or MAD. The flight time will not differ and neither will the price - or not significantly
I have done Europe-LHR-JFK many times and was just thinking of trying something new but still have a tendency to fly BA

Whoops! I missed the Germany origin in your post!
If you are inclined to give IB a try give it a go. You might find that you prefer their service a great deal!