I'm ABOUT to do DFW-MIA-SCL (night 1) spend the day in SCL, do SCL-MAD (night 2) spend 2 hours at Barajas, do MAD-LHR, spend 2 hours trying to connect (and maybe get a shower) at LHR, then LHR-CPT (night 3), spend the day in CPT, fly CPT-JNB, spend 3 hours there then fly JNB-LHR (night 4), spend 6 hours at LHR (hello Heathrow Hilton!) and fly LHR-ORD-DFW during the day, going home for night 5.

It's not the longest trip but it's definitely in the running! Of course it's all in F, 'cause I'm a wimp.