Missoula, Montana: A US bride who shoved her husband of eight days off a cliff after they argued over her second thoughts about the marriage was sentenced to 30 years in prison on Thursday after a judge denied her request to withdraw her guilty plea.

US District Judge Donald Molloy said he saw no remorse from Jordan Graham, 22, in the killing of Cody Johnson, 25, at Glacier National Park. He also ordered her to pay $US17,000 in restitution.

Graham cried on the stand on Thursday and apologised to her family and Johnson's. But Judge Molloy indicated he had continuing doubts about her honesty.

The judge said he was waiting for Graham "to say she was sorry for killing Cody", KGVO-AM reported.