Fast travel

[DAN-di-WARhol]

Is there a point at which you unlock fast travel to previous locations?

I'm nearing the end of the game and there is loads of stuff I've missed in previous levels.

[Blazing]

No.

Although maybe with the Good, Bad, DLC you could technically use it for that purpose if you're literally all to the way to the end, I believe.

That being said, the distance between areas is not really that much once you got the shortcuts.

[Rando Calrissian]

Fast travel is gained via the testing chambers (DLC The Good, the Bad, and the Augmented), once you have used the last testing chamber door in the Nucleus.