Southwest Airlines has a policy regarding infants and young children traveling with their parents or guardians. Here are some key points of their infant policy:

1. Age Limit: Infants under the age of 2 (24 months) can travel for free on Southwest Airlines when they are traveling with an adult (18 years or older) who has purchased a ticket. However, the infant must be held by an adult during takeoff, landing, and turbulence.

2. Required Identification: Although infants do not require a ticket, they still need to have some form of identification. A birth certificate or passport is recommended.

3. Lap Infant: Southwest Airlines allows infants to travel on the lap of a parent or guardian. If the parent or guardian wishes to use a car seat, a separate ticket must be purchased for the infant.

4. Strollers and Car Seats: Southwest Airlines allows strollers and car seats to be checked for free at the gate. They must be tagged with a gate-check tag and can be picked up at the baggage claim area upon arrival.

5. Boarding: Families with young children are allowed to board between the A and B groups during general boarding.

It’s important to note that while infants under 2 years old can travel for free on Southwest Airlines, they are not guaranteed a seat. If the flight is full, the infant may need to sit on the lap of the parent or guardian for the entire flight. It is recommended to contact Southwest Airlines in advance of your flight to ensure a smooth travel experience with an infant.