Allegiant Air Infant Policy

Allegiant Air Infant Policy: Traveling with a baby is an adventure in itself, but adding the logistics of an ultra-low-cost carrier can feel like a lot to juggle. If you’re flying with little ones, the Allegiant Air Infant Policy is actually one of the more parent-friendly aspects of the airline. While they charge for almost everything else—from water to carry-ons—they provide several freebies and specific rules designed to get your family to your destination without a meltdown.

From lap infant rules to gate-checking your heavy gear, here is the complete guide to flying Allegiant with an infant.

Allegiant Air Infant Policy: Age and Basics

Allegiant defines an "infant" as any child under the age of 24 months. Once a child hits their second birthday, FAA regulations require them to have their own purchased seat.

The Lap Infant Option

If your child is under two, they can fly as a lap infant for free on domestic flights.

The "One-to-One" Rule: Each lap infant must be accompanied by a separate adult (at least 15 years old). If you are flying solo with twins, you can only have one on your lap; the second twin must have a purchased seat.
Minimum Age: Infants must be at least 15 days old to fly. If you need to travel with a newborn younger than two weeks, you’ll typically need a physician’s letter stating the baby is fit for air travel.

Purchasing a Separate Seat

Even if your baby is only six months old, you have the option to buy them their own seat. This is often recommended for longer flights so you can secure them in an FAA-approved car seat, giving your arms a much-needed break.

Required Documentation: Don't Forget the Birth Certificate

This is a point where many parents get stuck at the counter. Even though TSA doesn't require ID for children under 18, the Allegiant Air Infant Policy often requires proof of age to verify the child is truly under two years old.

Important Update: Allegiant has become stricter about age verification. It is highly recommended to bring a hard copy or a digital photo of your child’s birth certificate. If your baby looks like they might be nearing two, the gate agent has the right to ask for proof. If you can’t provide it, you might be forced to buy a last-minute seat at the airport price, which is never cheap.

Manually Edited Insight: The "Diaper Bag" Loophole

I’ve learned through trial and error that Allegiant’s baggage rules are famous for being strict, but the infant policy is actually your secret weapon for extra storage. While a standard passenger has to pay for a carry-on, the Allegiant Air Infant Policy allows every fare-paying adult traveling with a child to bring one diaper bag for free, and it doesn't count toward your personal item limit. This is a lifesaver. I always use a high-capacity diaper backpack and stuff the side pockets with a few extra snacks and a tablet for myself, alongside the usual wipes and diapers. Just make sure the bag contains actual baby essentials, or a particularly eagle-eyed agent might call you on it. It’s one of the few ways to get a "free" extra bag on Allegiant, so take advantage of it!

Strollers and Car Seats: What’s Free?

Allegiant is very generous with baby gear. You can check your heavy equipment without paying a dime.

Gate Checking

You are allowed to bring one stroller and one car seat to the gate for free.

The Process: When you get to your gate, ask the agent for a "gate check tag." You’ll leave the stroller at the end of the jet bridge right before you step onto the plane.
Arrival: When you land, your stroller will be waiting for you right outside the aircraft door. This is much easier than hauling a tired baby through a massive airport to reach the baggage carousel.

Checked Baggage

If you don't want to lug the car seat through the airport, you can check it at the ticket counter when you first arrive. Again, this is free and does not count against your checked bag allowance.

Seating and Safety Requirements

Because of oxygen mask configurations and evacuation protocols, there are specific places you can and cannot sit with an infant.

No Exit Rows: This is a non-negotiable FAA rule. No infants (lap or seated) are allowed in exit rows or the rows immediately in front of or behind them.
Window Seats for Car Seats: If you bought a seat for your infant and are using a car seat, it must be placed in a window seat. This ensures that the car seat doesn't block the path of other passengers in an emergency.
The Middle Seat Strategy: If you are two adults traveling with one lap infant, it’s often best to book the window and aisle. If the flight isn’t full, you might luck into an empty middle seat for the baby. If it is full, the person in the middle will almost always happily trade for your window or aisle!

Onboard Amenities (Or Lack Thereof)

It’s important to manage expectations when flying a budget airline with a baby.

No Bassinets: Unlike international carriers, Allegiant does not provide onboard bassinets or "skycots."
Changing Tables: Most (but not all) Allegiant aircraft have at least one lavatory equipped with a fold-down changing table. Ask the flight attendant which one it is before you settle in.
Milk and Formula: You are allowed to bring breast milk, formula, and juice in quantities larger than 3.4 ounces through security. Just let the TSA agent know you have them; they may need to do a separate quick scan of the bottles.

Summary Checklist for Parents

Add the infant to your reservation at the time of booking (it's harder to do later).
Pack the birth certificate (or a very clear photo of it).
Use the free diaper bag allowance for your "must-haves."
Tag your stroller at the gate as soon as you arrive.
Check your car seat label to ensure it says "FAA Approved for Aircraft Use" if you plan to use it in a seat.

The Allegiant Air Infant Policy is designed to keep families moving. By knowing exactly what you can bring for free and where you can sit, you can save your energy for the actual vacation.