Kylie Jenner -- Flying High to 18th Birthday Bash

Kylie Jenner just touched down in Montreal to celebrate her 18th birthday where she'll be able to booze ... legally!

Kylie posted a video of herself first in a helicopter and then on a boat and it was all just to get to her party at Beachclub. We're told she's sans Tyga or any other family members.

The party, sponsored by InList, is open to the public and hundreds of screaming fans were there to greet her.

As for her drink of choice? We're told so far Kylie hasn't taken sip of alcohol even though it's totally legal in MTL.