With regard to quick turnarounds, I'll be doing one next week Madrid to Barcelona on IB, and next month Bangkok to Hong Kong on CX...just to qualify for the OneWorld 100,000 mile bonus (on both AA & BA!).

I booked the BKK/HKG roundtrip by phone, and told them to mail me the tickets. Two days later CX's ticket department phoned me: mine was the next ticket due for processing, and they wanted to make sure there wasn't some mistake since the itinerary showed I'd only be in HKG for 1½ hours! I assured them this was correct - I wouldn't even take the flights if I could be sure of getting the mileage - but was impressed by their diligence.