Originally Posted by
tardyturtle
This might be accomplishable by purchasing a post-purchase upgrade on the segment of interest, but there is no guarantee this upgrade will be an option. After booking in Main Cabin, look at the seat map and click on DeltaOne seat on your transatlantic flight and see how much money/miles they want for it.
Don't you lose your money if you have to change your flight after a post-purchase upgrade? Whereas if he were to book the fare class he wants immediately, he would at the very least get an ecredit.