Originally Posted by
Tchiowa
Yes, if you miss a segment they will cancel the remainder of your trip. If you call them and reschedule an open jaw you'll find the ticket price go up.
Maybe, or maybe not. It would be worth calling and finding out what the difference would be. LA is not a captive hub that commands higher prices, so I wouldn't be surprised if the difference is small. There will be a reissue fee, which may be offset by any residual value of the ticket.