Hello, Why does Vayama (or other sites) sometimes have cheaper fares than others? For instance, I am looking at SEA -> YVR -> NRT (return) and for the same itinerary, Vayama.com has it for $1097, while AirCanada has the itinerary for $1490 and Travelocity has it for $1329. All prices include taxes. Is this because Vayama is a travel agent who gets volume discounts? Or is this because these are different fare classes? On Vayama, it is quoted as LX503, Air Canada has the outbound trips as "Tango Plus S" and inbound as "Tango Plus W" and Travelocity says its SKXUJ. Is there any way to find out how to interpret these different codes? Thanks in advance!