Whic One World carrier program?
 

I fly D - E - L - T - A . Since I live in Jackson, MS,(JAN) they are the only logical choice. They have three times as many flights as every one else. For the One World 100,000 promo, I am seriously interested in joining a foreign FF program. I do a lot of Int'l travel, Europe and Asia, but don't know who to join. I could join AA since they service JAN - DFW, but would another program be better for Int'l travel. DL is very generous with Int'l upgrades. Who else would be?