OK how many runs can you do in DELTA ONE full flat seats (but not D1 service, just std 1st class) domestically I ask you? The ONLY thing wrong with this one is you get little time in Dallas but holy cow is this cheap for D1 seats for under 6CPM!
Here are the weekday lowest numbers:
Cost: $502 in 1st class
8,742 MQMs at 5.7 CPM
Bookable on Delta.com via Kayak.com link HERE
I have included the Google Flights or Kayak links and for those of you new to this, 1st log in to your Delta.com SkyMiles account and THEN you click the above links and it will, after you choose flights, send them over to Delta.com. Very simple! – René