what does a canadian citizen need to travel to us for vacation?

My mother-in-law is coming to visit in October and has never been to the US. What types of documents will she need to travel both to and from? She is flying on Air Canada on a direct flight from New Brunswick into Ohio and then a direct flight back out. By carrie lovePicture ID and a birth certificate, or a Passport. What a great thing for you do to, hosting your moher in law in Ohio. Hope the weather is great in October, and you have a super time. As you probably know, New Brunswick is very different from Ohio, and doesn't have any cities as large as Cleveland.

Picture ID (Drivers License) and Birth Certificate
Just her pasport, because it's an international flight, and crossing borders requires a passport usually. If she's a Canadian citizen, she doesn't need a visa.
Tell Her To Sneak Across,Meet Her In New York
Raised Seal Birth Certificate (Original) and a goverment issued photo ID, as of January 2007, ALL visitors to the USA will need to have a valid passport.
I know that driving into the US you need birth certificate and picture ID although I've never been asked for it when I've got into Maine camping or shopping. So I'd say flying you'd need the same info.