My 18 year old daughter US passport has expired we are going to Canada in two weeks. Can she get into and out of Canada with an expired US passport.
You can find full details on what documentation is required to travel been the US and Canada at www.getyouhome.gov
But in short, if you are flying then the answer will be No. If you are entering by road/sea the answer is still most likely no, unless she happens to have an Enhanced Drivers License.