We have used Kobol travel for 8 years now to book our travel between the U.S. and Bolivia. We've even visited Kobol's office in Cochabamba, Bolivia, which is the secret to his success. If you purchase airfare using Orbitz or Kayak, you may find a good price, but until you can buy tickets directly from AeroSur, BOA, Copa, or TAM in country, you won't be getting the best prices like Kobol does. He has saved us $100's every year on our travels. He consistently beats the online sites.