Both of them also have GDS integrations. I don't know exactly how much but I'd assume it's the bulk of their traffic. As a general rule the large majority of

Both of them also have GDS integrations. I don't know exactly how much but I'd assume it's the bulk of their traffic. As a general rule the large majority of anything you don't book directly with the airline/hotel (and for all I know, some of what you do) is very likely to be in a GDS somewhere.