Originally Posted by
rkkwan
I have no idea why CO does that, but in this BOS-BKK example, the way to do it is to put the CO BOS-EWR-NRT itinerary on hold (cash payment option or whatever), then call co.com web support to add the NW segment. That will likely be a NW flight number, but it'll price out as a discount fare, not full Y. [But of course, 50% EQM, etc...]
That's a possibility. The lowest fare BOS-NRT will book CO V and pricing out NRT-BKK on the NW site bumps you up to M class (vs. Q class for an all NW BOS-BKK itinerary). Those all earn 100% EQMs but independently they also add $500 to the cost vs. an all NW itinerary. Maybe I'll just give CO a call and see what they can price out for me.