I'm trying to fly SFO-SNA and I found the flights to be cheaper when I clicked "show surround airports" and I get flights that are MRY-SFO-SNA (which is a ridiculous itinerary to begin with). Two questions: If I have an itin which is SFO-SNA and SNA-SFO-MRY on return, is there any reason not to do it if it is cheaper, and just throw away the SFO-MRY boarding pass? Secondly, if I buy a ticket with an MRY-SFO-SNA itin, can I board at SFO without having taken the MRY-SFO leg? I've heard of itineraries being cancelled if you don't make one of your flights but given that this would be within an hour of the MRY flight having departed..