I used Kayak & Opodo. The problems I experienced were mostly due to how they connect/redirect to each airline's booking system. I was pining for the days when I

I used Kayak & Opodo. The problems I experienced were mostly due to how they connect/redirect to each airline's booking system. I was pining for the days when I could call my travel agent and have an actual human take care of my travel arrangements. Something like justbookmeabloodyflight.com: you give them your CC info & a specific travel request. They then book it for you and ONLY contact you if there is a problem.