The end of the list is more like time travel by various means, but the first few are actual time machines.
Time After Time – based on H.G. Wells Time Machine
The Time Machine – also based on H.G. Wells
Bill & Ted’s Excellent Adventure
Stargate
Hot Tub Time Machine – John Cusack
Back to the Future series
Click
Pleasantville
Time Bandits
God bless!

12 Monkeys (1995)
A Sound of Thunder (2005)
Army of Darkness (1992)
Austin Powers: The Spy who Shagged me (1999)
Back to the Future (1985)
Back to the Future II (1989)
Back to the Future III (1990)
Bill & Teds Excellent Adventure (1989)
Deja Vu (2006)
Demolition Man (1993)
Donnie Darko (2001)
El Milagro de P. Tinto (1998)
Evil Dead II (1987)
Flight of the Navigator (1986)
Forever Young (1992)
Freejack (1992)
Frequency (2000)
Happy Accidents (2000)
Harry Potter and the Prisioner of Azkaban (2004)
Idiocracy (2006)
Kate and Leopold (2001)
Les Visiteurs (1993)
Navigator: A Mediaeval Odyssey (1988)
Planet of the Apes (1968)
Primer (2004)
Sleeper (1973)
Somewhere in Time (1980)
Star Trek IV: The Voyage Home (1986)
Terminator 2: Judgment Day (1991)
The Butterfly Effect (2004)
The Final Countdown (1980)
The Jacket (2005)
The Philadelphia Experiment (1984)
The Terminator (1984)
The Time Machine (1960)
The Time Machine (2002)
Time After Time (1979)
Time Bandits (1981)
Timecop (1994)
Timeline (2003)
Timerider: The Adventure of Lyle Swann (1982)
Warlock (1989)

Don’t forget the best time machine movie, Time After Time with Malcolm McDowell as HG Wells and David Warner as Jack the Ripper. Or, possibly Black Adder: Back and Forth which deals with a time machine, as well.

“the time machine”, “benjamin button”

Time Machine
Time Cop
Back To The Future (trilogy)
Time Rider
Clockstoppers

Back to the Future!

Donnie Darko is a movie back and fourth in time