How is this question even remotely related to BA or BAEC?
DXB-LYR-IAH is about 2% (200mi) further than DXB-IAH direct, but perhaps there may be more favourable winds (or less unfavourable winds).
http://www.gcmap.com/mapui?P=dxb-iah;dxb-lyr-iah
Great tool thanks for that, I guess the fact that I got a great answer quickly proves it was the right place to post it
