Originally Posted by
NoDestinations
.... But since the pricing does not like me connecting in SFO and makes me book into full fare, if I instead book separate from SFO and also book separately the connection from ORD, is there a chance they would somehow be able to apply the GPU all the way thru even though they are on separate tickets? ....
No, a single instrument cannot be used on two seperate tickets.
As for the R availability varying based on routing, see
https://www.flyertalk.com/forum/unit...h-flights.html
Also, you may run into
Fare Class has Inventory - Not Able to Book into? as you try to piece together segments.