I searched and searched but couldn't find any threads with the answer...

I want to go from SBA to visit ABQ, 751 miles as the private jet flies. Since my access to private jets is limited at the moment, I thought I'd use some of my around the world credits - preferably only enough for the regional domestic ticket. The only way to do that, though, is SBA-DEN-ABQ, 916 + 349 = 1265 miles. But do the miles add like for 500 miler upgrades - end to end, and not each segment?

Would SBA-DEN-ABQ count as less than 800 miles and be eligible for the regional domestic ticket (at 4 credits), or only do-able with the full domestic ticket (at 8 credits - in which case I wouldn't do it)??