Originally Posted by
BA6501
If DXB-NRT is not available as a QF codeshare, then you're stuck to two separate tickets (QF + EK), fully EK, or some crazy expensive fare combining QF & EK on one ticket.
A fare combining QF and EK on one ticket need not be crazy expensive at all. As explained by sharp5flat9, many EK fares permit QF flights on the LHR-DXB legs. A quick search at dates in November shows the lowest EK only is a T fare £611, while the lowest fare allowing QF+EK is U at £846. Not the cheapest for sure, but not crazy expensive either.