Per Reddit: Skymiles sale to Tokyo (link).
Delta has round-trip flights from Dallas (DFW) to Tokyo (HND) for 40,000 SkyMiles and $6 to $51 in fees each-way. Flights in September.
A Carry-on bag and also a personal item is allowed for free on Delta.
With most Delta co-branded cards you can get additional savings on the amount of SkyMiles you spend when you redeem them. Visit the CardRatings.com website for a list of the best travel rewards credit card offers (link).