I just tried to book tickets from SEA to LIM based on farecast, in order to buy the tickets they sent me to copaair.com, this site does not have a departure from SEA. I called Copa on the phone and they gave me a much higher quote from 1192 in farecast to 1600 at Copa. This was a flight combination Continental/Copa. I called Continental and they gave me a quote of 1900. How do I buy this ticket? or is all false information.