+1
Just because it hasn't been mentioned:
A Connecticut Yankee in King Arthur's Court (1948) - Bing Crosby version (there's been a few, but this is the only one I've seen).
And did people miss Planet of the Apes (1968) on this thread? (Of course you don't know it's a time travel movie until the final reveal of the first film.)
Star Trek: First Contact (1996).
Also - there was a movie on TCM called "Turn Back the Clock" (1933) last night. I didn't see it, but found that some call it an early time travel movie that inspired later ones! (Now I wish I stayed up to watch it.)