During the Credits
There is an extra scene during the credits of The Flash.
The scene in which Flash saves the newborns from the collapsing hospital wing is re-shown from the therapy dog’s point of view.
After the Credits
There is a stinger after the credits of The Flash.
In the post-credits scene, Barry (The Flash) is shown with a very drunk Arthur Curry (Aquaman) leaving a bar. Barry tries to explain to Arthur that while in the various timelines there are different Batmen, Arthur is always the same, until Arthur passes out falling into a puddle.
Special thanks to Roberto Corsaro and shad for the stinger submissions!