What are the rules for infants on Southwest?

 

Traveling with a baby can feel overwhelming—especially if it’s your first time flying with an infant. Questions about tickets, seating, baggage, and safety are completely normal. If you’re planning to fly with Southwest Airlines, you might be wondering: what are the rules for infants on Southwest?

The good news is that Southwest Airlines offers one of the most family-friendly infant policies in the U.S. This detailed, explains everything parents need to know, along with expert support from

  Flights Counsel at +1 (877) 337-0761.

Southwest Airlines Infant Policy Overview

Southwest defines an infant as a child under 2 years old. Infants can travel either:

  • As a lap infant, or

  • In a paid seat using an approved child restraint system (CRS)

Both options come with clear rules designed to keep families comfortable and safe.

Lap Infant Rules on Southwest Airlines

One of the biggest benefits for parents is that Southwest allows infants under 2 to fly for free on a domestic flight when traveling as a lap infant.

Key Lap Infant Rules:

  • Infant must be under 2 years old on the day of travel

  • Infant must sit on an adult’s lap for the entire flight

  • One lap infant is allowed per adult passenger

  • Proof of age (birth certificate or passport) may be required

This option is ideal for short trips or parents who prefer holding their baby during the flight.

Flying With an Infant in a Seat

Parents who want extra space or added safety can choose to purchase a seat for their infant.

Important Guidelines:

  • You must buy a ticket for the infant

  • The infant must sit in an FAA-approved car seat or child restraint system

  • The car seat must fit within the aircraft seat dimensions

Although this option costs more, many parents prefer it for longer flights or added peace of mind.

Boarding and Seating for Families

Southwest Airlines does not assign seats, but they do make boarding easier for families.

Family Boarding

  • Families with children 6 years old or younger may board during Family Boarding

  • This happens after Group A and before Group B

This allows families time to find seats together and install car seats comfortably.

Infant Baggage Allowance on Southwest

Traveling with a baby means extra gear—and Southwest makes it easier.

What You Can Bring for Free:

  • One stroller per child

  • One car seat per child

  • Child restraint systems

These items can be checked at the ticket counter or gate-checked at no extra cost.

In addition, diaper bags are usually allowed as part of your carry-on allowance.

Carry-On Rules for Infant Essentials

Southwest is very accommodating when it comes to baby necessities.

You may bring:

  • Formula, breast milk, and baby food (exempt from standard liquid limits when declared at TSA)

  • Diapers, wipes, and baby clothing

  • Breast pumps and medical equipment

These items should be easily accessible during the flight.

Changing a Lap Infant to a Paid Seat

If your baby turns two around the time of travel or you change your mind, Southwest allows you to:

  • Convert a lap infant to a paid seat

  • Add a child seat later if availability allows

For help making these changes smoothly, contact Flights Counsel at +1 (877) 337-0761.

International Travel With Infants on Southwest

For international flights:

  • Lap infants may not be free

  • Taxes and fees may apply

  • A valid passport is required

Rules can vary by destination, so it’s best to confirm details before booking.

Safety Tips for Flying With Infants on Southwest

  • Feed your baby during takeoff and landing to help with ear pressure

  • Choose aisle seats for easier movement

  • Bring extra diapers and clothes in case of delays

  • Use an FAA-approved car seat for added safety

Why Families Choose Southwest Airlines

Parents love Southwest because of:

  • Free lap infant travel on domestic flights

  • No change or cancellation fees

  • Free checked strollers and car seats

  • Family-friendly boarding process

These policies make flying with a baby less stressful and more affordable.

Final Thoughts: Southwest Airlines Infant Rules Explained

Southwest Airlines allows infants under two to travel free as lap infants on domestic flights or in a purchased seat with an approved car seat. With free checked baby gear, family boarding, and flexible policies, Southwest is a top choice for parents.

For booking assistance, infant ticket changes, or travel questions, call Flights Counsel at +1 (877) 337-0761 and enjoy a smoother journey with your little one.

Because when it comes to family travel, comfort and flexibility matter most. ✈️👶

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