There's only one DL flight daily from Atlanta to NRT. It's on old refurbished 747s with flat beds in BF. Nice IMO.

That said - it wouldn't make much sense for someone in Boston to fly out of Atlanta.

If I were the OP - and had the hundreds of thousands of points needed for 2 BF tickets - and wanted to give a present to 2 young people - I'd probably use some for economy tickets - and spend the rest on really nice hotels. Robyn