a quick random search: http://www.momondo.pl/multicity/?Search=true&TripType=return&SegNo=2&SO0=LON&SD0=DXB&SDP0=17-10-2013&SO1=DXB&SD1=LON&SDP1=31-10-2013&AD=

a quick random search: http://www.momondo.pl/multicity/?Search=true&TripType=return&SegNo=2&SO0=LON&SD0=DXB&SDP0=17-10-2013&SO1=DXB&SD1=LON&SDP1=31-10-2013&AD=1&TK=ECO&DO=false&NA=false#Search=true&TripType=return&SegNo=2&SO0=LON&SD0=DXB&SDP0=17-10-2013&SO1=DXB&SD1=LON&SDP1=31-10-2013&AD=1&TK=ECO&DO=false&NA=false http://www.momondo.pl/multicity/?Search=true&TripType=return... vs http://www.hipmunk.com/flights/LON-to-DXB#!dates=Oct17,Oct31&pax=1 http://www.hipmunk.com/flights/LON-to-DXB#!dates=Oct17,Oct31... $507 vs $528, and both have Pegasus where Momondo shows the cheapest Pegasus at $507 and Hipmunk at $553 and a self-quote from an email conversation I had in december about flight search engines: "Just to picture an example, random query 30dec-05jan Warsaw-Istanbul. Hipmunk cheapest: 407usd (turkish). Momondo cheapest: 299usd (aerosvit). that's over 1/3 more."