Really, where are you flying from? If your in the US your already here no you wouldnt need a passport. If your flying from outside the US then yes.
Unless you're flying internationally, no you do not. But if you have one, I would recommend bringing it as a second form of ID
If you are traveling within the United States you only need a government identification such as a driver's license or a state Photo ID
No, you don't need your passport. Just a state ID.
No. But an ID should be brought.
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