check into
US /tʃek ˈɪntuː/
UK /tʃek ˈɪntuː/

1.
fazer o check-in, registrar-se
to register at a hotel or airport
:
•
We need to check into the hotel before 3 PM.
Precisamos fazer o check-in no hotel antes das 15h.
•
Passengers are advised to check into their flights at least two hours before departure.
Os passageiros são aconselhados a fazer o check-in em seus voos pelo menos duas horas antes da partida.
2.
investigar, verificar
to investigate or examine something
:
•
The police are checking into the suspicious activity.
A polícia está investigando a atividade suspeita.
•
I need to check into why the system crashed.
Preciso investigar por que o sistema travou.