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I think you missed inception on this list. I know it was about dreams but there was some time traveling going on as well :)

Inception was great. I just never really thought about it as a time travel movie. I'll have to watch it again and maybe reconsider.

check it out again. I think you'll find that although that isn't the main premise of the story, It has a lot of time jumping going on within the concepts of the dreams

Back to the future is obviously the best time travel movie I have seen

It felt obvious to me that Back to the Future had to be number 1 but I did have a hard time knocking Primer down to number 2.

Interstellar is my favorite. :-)

Awesome movie but so depressing.