Time loop stories can end in different ways. Sometimes, like in 'Edge of Tomorrow', the main character sacrifices himself in a way that breaks the loop and saves the day. In other cases, the character may figure out the root cause of the loop and find a way to stop it from ever starting again. This could involve fixing something in the past or making a different choice that changes the flow of time. Another way is that the loop itself might transform into something new, like in some more complex science - fiction time loop stories where the loop becomes a stable, but different, timeline.
Well, in many time loop stories, the end comes when the character has achieved a certain goal within the loop. In 'Happy Death Day', the girl discovers the identity of her killer and stops the loop by preventing her own death. In some stories, the loop may end when the character has learned all they need to learn. For instance, in 'Before I Fall', the girl has made amends and come to terms with her life and relationships, and then the loop ends. Also, there could be an external factor that ends the loop, such as a device being destroyed or a magical spell being broken in more fantastical time loop stories.
A different way they can end is with a twist. The character thinks they've broken the loop but actually haven't. Or perhaps they break the loop only to find themselves in another, more complex time - related situation. This keeps the mystery alive and leaves the reader with a sense of wonder about the nature of time and loops.
In certain time loop paradox stories, the end comes when the paradox is resolved in a rather unexpected way. For instance, the actions that initially created the paradox end up being part of a larger plan or a natural order that was not initially understood. It could be that the time loop was actually necessary for the universe or a particular situation to reach a certain state. So, instead of breaking the loop, the character discovers that they were meant to be in it all along and that their actions within the loop had far - reaching consequences that they hadn't foreseen.
Some time loop novels end with the character breaking the loop. For example, in 'Groundhog Day', the main character finally manages to make the day progress and break free from the repeating cycle. Others might end with the character accepting the loop as a part of their existence, like in some more philosophical time loop stories.
They often end with a resolution of the problem that started the time - jumps in the first place. For example, in 'The Time Traveler's Wife', the story ends with a kind of acceptance of the time - jumping situation, and a bittersweet moment of goodbye.
Often, they end with a restoration of the original timeline or a new, better future being created. For example, in 'Back to the Future', Marty manages to fix the past and returns to a present that has been improved.
They often end with a new understanding of the consequences of time - replacement. For instance, the character realizes that changing one thing might have caused other problems, so they learn to accept the original timeline in a way.
Often, they end with the restoration of the original time line. For instance, if someone had changed the past, they might find a way to reverse those changes so that the future is as it should be.
Often, they end with the time traveler either returning to their original time and having a new perspective on life. For example, in 'The Time Machine', the protagonist comes back with a deeper understanding of the future of humanity. Sometimes, they end with the traveler changing the future for the better, like in 'Back to the Future' where Marty McFly ensures his family has a more positive future.
Well, in many time travelling stories, the end can be about closure in the timeline. In 'A Connecticut Yankee in King Arthur's Court', the Yankee has made his mark in the Arthurian era but eventually has to face his own mortality and the end of his time - traveling adventure. Another way is that the time traveller may have learned a valuable lesson during their travels and return to their time a changed person, as seen in some episodes of 'Doctor Who'. There are also stories where the end is a cliffhanger, leaving the possibility of more time - traveling adventures open, but that's not as common.
Often, they end with the character either losing the power to stop time, like it was a temporary gift or curse that has run its course. For example, in a magical world story, the magic that allowed time - stopping fades away.