Originally Posted by
hartlogan
Depending on what flights and routing you have left, you can try to standby or same-day confirmed flight change to add an additional segment. I've done this before midway into a journey via an Admiral's Club, and I think SDFC now allows change in segments.
As of July, SDFC no longer allows changes to the number of segments.
Standby may allow it as long as the desired routing is permitted by the fare rules, but at the risk of not clearing on one or more of the connections.