Sorry to hear about the emergency.

In this situation it might be cheaper to forego the miles and fly with JetBlue or America West.

Did a quick search on Orbitz, and a fare of $303 came up for this:

America West Airlines 881
Tue, Jan 21 9:40a-12:01p
plane change
Los Angeles (LAX) Phoenix (PHX) 1

America West Airlines 14
Tue, Jan 21 12:47p-7:26p
Phoenix (PHX) New York (JFK)

America West Airlines 54
Tue, Jan 28 10:15a-12:50p
plane change
New York (JFK) Las Vegas (LAS) 1

America West Airlines 110
Tue, Jan 28 1:27p-2:35p
Las Vegas (LAS) Los Angeles (LAX)