Canada acted quickly because Rahaf was found to be in danger in Thailand while Australia was slow to process her application, officials say.
Teen said she will be killed if she returns to her family and Saudi Arabia.
The United Nations has asked Australia to take her in.
The 18-year-old has left the Bangkok airport hotel room she had barricaded to prevent her deportation. She says she plans to seek asylum in Australia, fearing her family would kill her if repatriated.
Who is Rahaf Mohammed Alqunun, the Saudi teen who's locked herself in a Thai hotel room, and what's happening to her?
The dramatic turn of events and Alqunun’s pleas for help echoed those of other women who have tried to flee the abusive or restrictive conditions imposed on them in Saudi Arabia.
Will an Australian visa save Rahaf Mohammed Alqunun from being sent back home?
There is more to Pita than meets the eye.
The literally chill dude documented his record-breaking trip on Instagram.
Another Indonesian tsunami may be imminent, as experts fear extreme weather could collapse Anak Krakatoa volcano
Heavy rains that are expected to last until Wednesday afternoon could trigger landslides, sending the flanks of Anak Krakatoa crashing into the sea.