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Carry-on: One item not more than 50 linear inches (length+ width + height).
Checked: Fortunately, checking one or two regulation-sized bags with Southwest is free.
Excess: If you plan on packing a third (up to the ninth) bag, or one of your two free bags weighs between 51-70 pounds, you’ll be charged $50 per bag. A tenth bag will cost $110.
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