Complete baggage policy, carry-on dimensions, fees and pet rules for Southwest Airlines. Always confirm directly with the airline before flying.
Carry-on baggage
Included in fare
✅ Yes
Max size
61 × 41 × 25 cm (24 × 16 × 10 in)
Max weight
No weight limit
Personal item
Free
Checked baggage
Allowance
First 2 checked bags FREE (50 lbs / 23 kg each)
Fees / notes
Famously generous — no bag fees for first 2 checked.
Best bag policy of any US carrier. 3rd+ bag: $75 each.
Pet policy
In cabin
Allowed ✅
As cargo
Not allowed ❌
Cabin limit
Carrier max 18.5 × 8.5 × 13.5 in
Fee
$125 one-way
Cabin only — no cargo program. Two same-species pets per carrier allowed. Small vaccinated dogs and cats only. Domestic US.
⚠️ Airline policies change frequently. This page is based on each carrier's published baggage policy; always verify the latest fees + rules directly with Southwest Airlines before flying.