ahhhh i had the same problem if you get the passport re issued under new name within 1st year of marriage it costs you nothing, but you will need to have been married in Australia for it to cost you nothing,

i point that out as i was married in new zealand but from oz and for me i would need to get my name officially registered within Australia's births deaths and marriages. my passport is still in maiden name im keeping it that way till it expires in 8 years. i just carry extra id on me give the passport ppl a call

i must stress passport name and your ticket name MUST match! i juts came back 2 months ago from nz again no issues at all hope this helps