In merely the order I remembered them:

• Back to the Future series
• Avengers: Endgame
• Hot Tub Time Machine (because it's mentioned in Endgame!)
• Palm Springs
• Primer
• The Time Machine (1960)
• The Time Machine (2002)
• Terminator series
• Donnie Darko
• Groundhog Day
• Safety Not Guaranteed
• Twelve Monkeys
• X-Men: Days of Future Past
• Time Bandits
• Looper
• Predestination
• Bill & Ted series
• Source Code
• Flight of the Navigator
• Time Trap
• Star Trek IV: The Voyage Home
• Tatami Time Machine Blues - OK, not a film, but really good fun.
• The Map of Tiny Perfect Things

I think some don't quite qualify - e.g. 13 going on 30, Edge of Tomorrow and Interstellar all have time travel components to them, but don't quite make it to my heading of "time travel plays a major ongoing component of this film". Getting frozen and waking up later doesn't count either (hello Demolition Man!)

Most of those are actually pretty good, but the one I have the fondest adult memories of (rather than ones I watched as a kid and have automatic rose-coloured filters applied) is Palm Springs. It's free to stream on Amazon Prime in the UK right now.

And ones I haven't seen yet (or have I?) but want to

Are there any? Maybe Frequency and The Girl Who Leapt Through Time? Otherwise it's looking like I've mined this particular sci-fi seam about as far as it's worth doing!