Check this out:
Planning Avios-sponsored tour of the US this summer with my wife. Tentative Itinerary, pending availability:
NYC - Miami - Atlanta - St. Louis - NYC
<breathe>
NYC - Dallas - Grand Canyon area (airport???) - LA - Vancouver (not US, I know) - NYC
Any thoughts, tips, or gaonishe chaps would be appreciated.
NYC-Miami might be cheaper using jetblue etc.
Grand canyon area is LAS, PHX, or TUS. This also might be cheaper with Southwest from DFW.
PHX-LAX is a 6 hour drive. There are often great deals on one way car rental from out of CA into CA or vice versa, so u might wanna drive.
If you go to Vancouver you should probably also go to Seattle, which is 2 hours away.
I don't know why you're going to Atlanta (unless you have family).
If I were you New Orleans is a must. Cheap hotels and don't need a car. Go there with AA from DFW.
There are threads about most of the above destination where you will find a vast pool of knoweldge.