What is a vacant seat?
What is a vacant seat? : being without content or occupant. a vacant seat on a bus. a vacant room.
How can I get seats on a plane without paying extra?
How do you avoid a seat selection fee? If you're traveling with a group, the best way to avoid a seat selection fee is to book your seats at the same time. If the airline is assigning seats for you, it typically seats people under the same record locator number together.
Can an airline not give you a seat?
If there are not enough passengers who are willing to give up their seats voluntarily, an airline may deny you a seat on an aircraft based on criteria that it establishes, such as the passenger's check-in time, the fare paid by the passenger, or the passenger's frequent flyer status.
Is it rude to not switch seats on a plane?
Not at all. You have a seat either assigned by the airline or you paid for it. If someone has a compelling reason that matches with your willingness, then by all means swap. But be SURE to tell the attendants.