Continental Airlines has misfiled a V-class (Economy) fare from Lisbon, Portugal to Caracas, Venezuela. Rather than $550 o/w, it is only $55 o/w. With taxes, fees, and fuel surcharge, the lowest a/i fare is $440 r/t.
LIS-LHR-IAH-CCS, departing August 4 (LIS-LHR operated by BA)
CCS-IAH-LHR-LIS, departing August 19 (LHR-LIS operated by BA)
There appears to be a minimum four night stay on the fare, which earns full mileage in most Star Alliance programs. Free stopovers are allowed in IAH or EWR so you would not necessarily have to do the whole mileage run at once.
Be warned, I’d feel safer in Baghdad than in Caracas. But the Angel Falls in the Guiana Highlands would be a sight to see.
Details and discussion in this Flyertalk thread. Book fast if you’re interested on CO’s website. You will have 24 hours to cancel.