She needs to use her maiden name on her purchased ticket since her passport was still on her maiden name. She will only show to the US Immigration when she come back the marriage certificate or her greencard as proof of her status in the US when she enter again.
Changing her passport in her married name in the Phils. would not be possible. Not unless it is needed to be renew or you've been already reported your marriage to her at the Philippine Embassy in Washington D.C. This is only based on my experience, I tried to report my marriage when i am in the Phils last June when we visit. but the adviced that I get in DFA records office, is that i need to report it in Washington DC first, and they will give your registered report of marriage form and will assigned registered number for the NSO legal filing in the Phils.
So when i come back to US, we reported our marriage thru mail to the Phil. Embassy in Washington DC, I sent the necessary documents they've asked for, and I included the renewal of my passport for changename to my married name even it will still took 2-3 months for my passport to expire. And it took me, 2 weeks to get back my registered report of marriage copy form and my new phil. passport in my married name.
QUOTE(Tsup2 @ Mar 2 2008, 11:30 AM)

My wife came to US on K1 and now is returning to Iloilo to bring her son back to US. She was told that she had to purchase her ticket using the name on her passport (maiden name). We thought about her changing her passport to her married name while she is home in the Philippines but are concerned she will have a problem at the airport either with the airline or customs officials. She has her advanced parole in her maiden name and her work authorization in her married name. Also will carry our marriage certificate and her birth certificate. Has anyone experienced this situation? Any advice very much appreciated.