Most airlines except for Spirit if you get the bag past security when you bring it to the gate they will check it for you for free. Now I don't think you'll get away with the full size suitcase but something a little larger than a normal carry-on will probably pass the smell test. They will not charge you a fee if they put it under the plane at the gate
At Delta it's 30 for the first bag. But like everyone else has said so far, it depends on the airline
It's depends on the airline, call your airline and find out ahead of time.
All depends on the airline.
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