Star Alliance member Avianca has a business class fare between several US cities and Peru from $407 roundtrip.

You can fly from:

• Chicago
  
• Houston
  
• Miami
  
• Fort Lauderdale
  
• Los Angeles
  
• Washington Dulles

And travel is either to Lima or Cusco. It’s possible to fly into one and back from another as an open jaw. Cusco will be your base to visit Machu Picchu.

Copyright: markskalny / 123RF Stock Photo

Fare basis DMA00TG9 has a 3 day minimum stay and 90 day maximum stay. Travel must be completed by June 30. Connections are in San Salvador and the fare allows one free stopover.

The fare is refundable for a $175 fee and the change fee is $125 — but will involve a difference in fare.

This is $149.50 each way plus tax for business class.

Since it’s not a United ticket, mileage-earning is based on distance rather than price. As a D fare you earn 100% of miles flown. For Los Angeles – Lima that’s 8503 miles.

Since we don’t know for certain how the airlines will feel about such a deep discount airfare sale, whether they might get seller’s remorse, I’d wait a few days after buying tickets before making additional non-refundable travel plans around the fare.

In theory an airline refusing to honor a sale like this would have to reimburse any out of pocket costs you incurred but there’s not much history with enforcement of that particular DOT statement so I’d still not test it.

(HT: SecretFlying)