Southwest's standout perk is two free checked bags per passenger, a genuine cost saver versus most airlines. This guide covers what's included, the carry-on rules, and the weight and size limits that can still trigger a fee.
Two free checked bags
Every Southwest passenger gets two checked bags free, on every fare — a policy that sets Southwest apart from carriers charging per bag. For a family, that's a large saving versus airlines that charge both ways.
The bags must be within standard size and weight limits to fly free; beyond those, standard overweight/oversized fees apply.
Carry-on allowance
You can also bring one carry-on plus one personal item at no charge. The carry-on goes in the overhead bin and the personal item under the seat.
Because bags are free anyway, most travelers simply check what they don't need in the cabin.
Size and weight limits
Free checked bags must stay under 50 lb (23 kg) and 62 linear inches, the same standard as most airlines. Bags over those limits incur overweight or oversized charges.
A third bag and beyond also carry a fee. For most travelers, two free bags cover the trip.
When fees still apply
Fees kick in for a third checked bag, and for any bag that's overweight or oversized. Special items like some sports equipment may have their own rules.
If you're comparing Southwest against a cheaper base fare on another airline, remember to add that airline's bag fees — the 'more expensive' Southwest fare is often cheaper all-in. We can compare it for you.
Frequently asked questions
How many free bags does Southwest allow?
Two free checked bags per passenger on every fare, within standard size and weight limits.
Is a carry-on also free?
Yes — one carry-on plus one personal item, in addition to the two free checked bags.
What's the weight limit for the free bags?
Under 50 lb (23 kg) and 62 linear inches; overweight or oversized bags incur a fee.
When does Southwest charge for bags?
For a third bag and for overweight/oversized items. We can compare Southwest all-in against other airlines for you.
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