Originally Posted by
Ben and Jerry
For future reference, when you book via Delta, before you hit 'purchase', it should show you exactly how many MQDs you will earn for that booking. It's shown near the bottom.
(this is a booking JFK-LHR-JFK with outbound in delta metal, and return in Virgin)
If the VS operated flight is DL marketed (which I'm assuming is the case here), that's not going to apply to poster's situation as the above numbers will use fare paid in both directions of travel to calculate MQD and miles earned. Again, operating carrier is not relavant to earnings, only the marketing carrier code on flight is used to determine fare paid vs. distance traveled in MQD/mileage calculations. I suspect OP did not book through delta.com as it usually only shows DL codings and fares and does not give one the option to book as partner coding/fares.
Although it is sometimes possible to bring up partner marketed flights on delta.com if you use ITA Matrix Powertools browser extension (so perhaps OP used that). Base Z fares on flights below are $1820 each-way. JFK-LHR is roughly 3451 miles. So $1820 + (3451 x .3) = 2856 MQDs as shown below.
