What time is the wedding? If you took the flight (which is showing delayed but not cancelled), you could have spent the night in SLC (probably on DL's nickel) and then taken the 8:30am flight 945 to LAX, getting in at 9:30.

Also, it would seem that you should also be able to invoke the often-mentioned Rule 240 and get yourself on another airline's flight to LAX tonight, Like AA 2673 - AA 1835, arriving at 11:30 pm (even though it's sold out in Coach, you should be entitled to any available seat, even in the next class of service, per rule 240). So, if you haven't left the airport yet...don't give up. Get on a plane tonight.