The everyday way to talk about the future is ir in the present + an infinitive — just like English going to:

Pronoun	Ir	+ infinitive	English
eu	vou	viajar	I'm going to travel
você / ele / ela	vai	ficar	you're / he's / she's going to stay
nós	vamos	comer	we're going to eat
vocês / eles / elas	vão	sair	you're / they're going to go out

Only ir changes; the second verb stays in the infinitive. A gente takes vai, as usual: A gente vai viajar.

In conversation, this is the future — it covers English will as well: Amanhã eu vou trabalhar. — I'll be working tomorrow.