I've read the last 150 posts and haven't found the answers to my questions:
1) I'm booked SFO-ORD-LHR-FRA, last segment on LH. Can I call 24 hours before the SFO-ORD flight and change to SFO-LAX-LHR-FRA? Or do I have to wait until 24 hours before LAX-LHR?
2) Can I change to SFO-XXX-FRA (with XXX a domestic hub)? The wiki says an agent can do it, a recent post said many agents wouldn't do it bc of the LH segment.
3) My return is FRA-BRU-ORD-SFO, but it's fared as an SFO-BRU roundtrip with a stopover in FRA. Assuming yes to (2), can I SDC to FRA-ORD-SFO over the fare break?
4) The FRA-BRU flight is in U and BRU-ORD-SFO flight is in W. Assuming yes to (3), which fare class needs to be available on FRA-ORD?