Do I have to pay for checked in luggage

You can check 2 bags free with Southwest. Size and weight restrictions apply.

Great answers yes call airline direct.

Pretty much every airline except Southwest chages for checked luggage.

This is an airline question. Depends on the bag fees associated with your airline and the fare you purchased. If you purchased a low fare ticket from any airline there will certainly be a checked bag fee, rates vary.

Please call the airline you are fying with. This is up to the airline not the airport.

It depends on which airline you are flying with. I would check their checked bag policy to see if you get any free checked bags.