D&D 5E Booming Blade and Blink

[beaumontsebos]

Right. But moving after all that would trigger booming blade, yes, if it were still somehow active?

Yes. That's how I'd go with it.

 

[dco]

So, for the purpose of bringing the boom... you don't consider when the blinking character "return(s) to an unoccupied space of (his/her) choice" that it was movement?

No, the spell only lasts 1 turn, it can not affect the other character in the second turn:
Round 1
- PC1: Booming Blade
- PC2: Blinks at the end of his turn.
Round 2
- PC1: Booming blade ends and he can not attack PC2.

And movement is defined on the combat section, you need to use your speed points.