Originally Posted by
Buccaneeratheart
Unfortunately, you won't be able to do it with DL miles. The lowest mileage seat actually bookable to Vietnam using Delta miles is 370,000 miles or more for one J ticket (in my case, from LAX). I checked all of October and November. But remember, you need to ignore the award chart when it says "low" (120,000 per J ticket) and "med" (240,000 per J ticket) on a round-trip basis because how it will actually price is between 370,000 and 490,000 miles for 1 J ticket. You will pass out when you see what DL is charging for VN seats.
Did you call to check availability or just pull those numbers out of your posterior? Somehow I'm betting on the latter...
Delta doesn't fly to Vietnam, and I don't know that any online-bookable award partners do either... Booking a revenue flight on Delta all I see is Korean codeshares.
Additionally, "med" and "high" don't really have meaning for partner availability.