The Billy & Mandy story "Better Luck Next Time" (Cartoon Network Block Party #45) has Billy messing with Grim's demonic cuckoo clock. It sends him and Mandy through time where they meet a mysterious cloaked figure that tells them to return to where they started. It backfires thanks to Billy's blundering. The cloaked figure turns out to be Grim in the future, resigned to being consigned to the two forever.
The backstory in ElfQuest involves type 6. About halfway to the start, someone tries type 2 on the future.
In Universal War One, scientists build a space station that accidentally opens a wormhole, allowing limited time travel. Then Kalish solves the equations that allow anybody to travel through time and space without limitation.
JSA has featured the modern Starman, a severe schizophrenic with powerful gravity controlling abilities. He claims, and it's probably true, that he is from a future Legion of Superheroes, future in terms of the Legion's comic too since he's an adult and the Legion in its comic is composed entirely of teenagers. Starman is also a dimensional traveler, who made his original appearance in Kingdom Come by helping Superman try and contain the villains and anti-heroes; apparently he can travel through time and the multiverse through a combination of his powers and a map that's written into his costume.
Prior to 1985Superman and Supergirl could time travel under his own power but would arrive in the past completely invisible (unless traveling to before he was born) and intangible, unable to interact with the past in any way, avoiding the problems with this trope. After 1985, Kryptonians were no longer powerful enough to time travel at all.
Time travel often shows up in the Disney Mouse and Duck Comics, in different flavors depending on the subseries and the specific technology:
Professors Marlin and Zapotek employ a time machine to send Mickey and Goofy to investigate historical mysteries. To come back, the travellers must be exactly where they arrived every six hours after the arrival (ways to offset this problem have been studied, but always presented trouble).
This one can be used for teleportation by setting the time travel to 0, but the experiments have shown it unsafe for the time being.
A one-shot character once used one to get rid of Super Goof. This variant is notable in that it allowed the traveler to interact with the past but not to interfere with it, resulting in Super Goof being tossed around by a flying butterfly and stabbing his feet by landing on grass.
Paperinik New Adventures makes heavy use of time travel, with a few recurring characters being Time Police agents and rogue time travelers that use the technology to steal and/or try and change the past (the ones that try by changing some specific event never succeed unless they do so by accident. The Organization, on the other hand, knows how to just grab the timeline to a specific course...)
Astro City has been known to dabble with this, most importantly in the backstory of the local Big Good, Samaritan, who travelled back in time to prevent a disaster in the "modern day". And he succeeded, only to prevent his own birth in the process.
It also plays a major part in the story of the Silver Agent, who travels through time to save the city after his own wrongful execution.
Judge Dredd: There have been a bunch of time travel stories. Officially, Strontium Dog is supposed to be set a century or so after Judge Dredd, so any crossovers would involve Johnny Alpha traveling to the past. Judge Dredd and Anderson also visited a Bad Future in "City of the Damned" through time travel. One time when Judge Death escaped, he tried to return to his original dimension, but wound up in the past by mistake because the scientist he took hostage hadn't properly tested the device.
In Yoko Tsuno, time travel is occasionally present in the series. So far, there has been 3 ways to travel through time: two invented on Earth by humans from different eras and another by aliens called Vineans.
In The Scrameustache, time travel stories rarely show up. On two occasions, it was to save Khena's family and another to free Uncle Georges from a curse.