As I've discussed in my tips, I priced out the flight and the cheapest non-stop I could find was a whopping $844 – even when I tried different days and times. Going with a 1-stop option got the price down to $550, but that's still really expensive and it tripled the length of travel time for him.
I logged in to Delta.com and found out that a non-stop itinerary was going to be 65,000 miles (32.5k each way...
United was a little better, but he would have missed all of Friday coming on the Saver seat, so it would have cost 30,000 miles to get him here Friday morning and home Monday evening.
I logged in to British Airways and lo and behold, I found Saver award space on their partner American for 9,000 points round-trip at exactly the times we wanted!