A que horas é o voo?

Breakdown of A que horas é o voo?

ser
to be
a que horas
at what time
o voo
the flight

Questions & Answers about A que horas é o voo?

Why does the sentence start with A, asking "At what hours" instead of just "What time"?
In Portuguese, when you ask what time an event happens, you must include the preposition a (at). It is just like how in English you answer with "The flight is AT five," but Portuguese requires the "at" right at the start of the question: a que horas.
Why is horas plural but the verb é (is) singular? Shouldn't it be são?
The verb always matches the main subject of the sentence, which here is o voo (the flight). Since the flight is singular, we use the singular verb é. You are literally asking "At what hours is the flight?"
Could I just use quando and ask Quando é o voo? instead?
Yes, you can! Quando means "when", so it works perfectly. However, quando is broader and someone might just answer "Tomorrow". Using a que horas specifically asks for the exact clock time.
Do I always have to put a que horas at the beginning of the question?
Not always! Portuguese word order is very flexible. It is completely normal and common to ask O voo é a que horas? by putting the subject first and the question phrase at the very end.

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