One-way or round trip?

I am going to be traveling and staying somewhere for a month. Should I buy a one-way flight ticket or a round trip ticket? or:I am going to be traveli

I am going to be traveling and staying somewhere for a month. Should I buy a one-way flight ticket or a round trip ticket?

or:I am going to be traveling and staying somewhere for a month. Should I buy a one-way flight ticket or a round trip ticket?

or:I would buy a one way ticket if you don't know the exact number of days you'll be staying, so you don't limit yourself. But, if you do know the exact number of days and round trip is cheaper than two individual tickets, I would do that.

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