Originally Posted by jkirsch

Thanks for the pointers.
I did indeed enter it incorrectly - LHR and MAD are just intended as transit points.
We were planning to add an ARN leg at the end, but transit through LHR and get off there.
After reviewing ARN fares vs. JNB/CPT, I think there's a more compelling case to start in South Africa and save ~$2000/person. If this is the case, we'd just substitute CPT for ARN.
The first GIG-EZE leg was a typo on my part. But I still can't figure out whether SCL-USH flights actually exist.