Here’s when to go to the bathroom during Avengers: Endgame according to CNET.
When the San Francisco title card comes on screen
It’s about 30 minutes into the film.
When Hulk is having lunch
This scene is just over an hour into the film.
When the New Jersey title card comes on screen
They tell us, there are no good spots to pee during the last hour of this film.
SOURCE: CNET https://www.cnet.com/how-to/when-to-pee-during-avengers-endgame-bathroom-break-run-for-it-here/
Here’s Paul Rudd’s advice.
The best time to go pee during 'Avengers: Endgame'? Paul Rudd says just pee in your popcorn tub and move on… pic.twitter.com/GUV7aGsf40
— Lights, Camera, Barstool (@LightsCameraPod) April 9, 2019
Also you don’t have to sit through the end credits unless you want just an audio gift: