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Southwest Airlines pet policy

Last reviewed: April 2026 · Official policy page

Labrador dog looking out a large bright window with natural light

At a glance

In-cabin
Allowed Max weight: 20 lb (pet + carrier combined) Max carrier: 18.5 × 8.5 × 13.5 in (L × W × H)
Fees
$125 each way.
Checked baggage
Not accepted
Cargo program
Not available

Breed restrictions

Domesticated cats and dogs only; must be harmless, odorless, and require no attention during flight. No specific breed ban listed for in-cabin, but pet must be comfortable and fit carrier.

Read our guide: Brachycephalic breed flight bans explained.

Routes and service area

In-cabin on Southwest-operated domestic flights only. Does not accept pets as checked baggage.

Confirm on the official policy page

This page summarizes Southwest Airlines's pet policy as of April 2026. Policies, fees, and breed restrictions can change at any time — verify the current rules before you book or travel.

Southwest Airlines official pet policy

Related tools

In-cabin eligibility checker Enter weight + carrier dims → get a quick yes/maybe/no Travel readiness checklist Sequence your vet visits, titer tests, and documents

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