Google Flights will bring up a map showing pricing when you leave destination blank and you can select First Class and Skyteam to limit it to Delta flights. You do have to pick dates, but this is generally not too hard. Assuming you want to go on a weekend, pick a Sat departure and Sun return (or Sat return if you are okay with same day or red-eye return from west coast) at least 2-3 weeks (the cheapest fares generally have a 3-week advance purchase requirement) out or so and avoid periods around Thanksgiving and Christmas as flights are much higher then. I see ATL-GEG in FC for $750 roundtrip on Nov 9-10. Also possible to so some same day turns for same price mid-week during the week of the 10th. With MSP routing and 50% FC MQM bonus this earns about 6K MQM's.