I always check www.americanexpress.ca Note: it is .ca and not .com/ This will bring you to the Canadian version of Amex travel which uses Sabre. Best feature here is the "Fare Listings" type in from/to and it gives you all available fares and codes with all the restrictions. Great if you need that special fare which usually is not offered on travelocity.com

For example: a Sydney to Adelaide query will bring up a fare that can only be purchased in conjunction with an international ticket. Or a fare that is only available to backpackers and other such restrictions. It sometimes takes a while to suuss out the restrictions but once you see one that fits - get your local agent who has access to sabre to issue under the appropriate fare basis.