Flying Allegiant Air with Kids: Infant Fees, Stroller Policy & Family Boarding

Per Allegiant Air's published policy, infants under 24 months at time of travel may fly as lap infants without a base fare on US domestic routes and on the carrier's international leisure routes to Mexico, the Caribbean, and the Bahamas. No infant taxes or fuel surcharges are layered on top of the USD 0 fare on these routes. A birth-certificate proof-of-age requirement was introduced in April 2025. Adding the infant requires a phone call to Allegiant Reservations — online addition is not supported — and an agent assistance fee of USD 15–35 may apply. If the infant turns 2 during the trip, the return leg requires a full paid seat at the prevailing adult fare. Always verify the current policy directly at allegiantair.com before booking.

Per Allegiant Air's published policy, infants under 24 months may travel as lap infants without purchasing a dedicated seat. However, the FAA strongly recommends that every child under 2 fly secured in their own approved child-restraint system (CRS) rather than on a parent's lap, as the lap position provides the least protection in turbulence or impact events. If you choose to purchase a seat for your infant to use an FAA-approved car seat, the seat is charged at the full prevailing adult fare — Per Allegiant Air's published policy, allegiant does not offer an infant-seat discount. The decision depends on flight duration, the number of children traveling, and whether you plan to gate-check or install the car seat in-cabin. Always verify current policy at allegiantair.com before traveling.

Per Allegiant Air's published policy, bassinets are not available on any aircraft in the Allegiant fleet. The carrier operates exclusively Airbus A319, A320, and A321 narrow-body aircraft on US domestic and short-haul international leisure routes. These aircraft do not have bulkhead bassinet attachment hardware. Babies must be held on a parent's lap for the duration of the flight, or placed in an FAA-approved car seat if a paid seat has been purchased. Parents who require bassinet access for infants on longer routes should consider full-service or wide-body carriers — per Singapore Airlines' published policy, for example, bassinets are available on long-haul wide-body aircraft. Verify Allegiant's current fleet configuration at allegiantair.com before booking.

Per Allegiant Air's published fee schedule, children aged 2 and older receive the same A-La-Carte baggage allowance as adult passengers — meaning carry-on bags (USD 25–75) and personal items (USD 0–35) are subject to the same fees. There is no child baggage discount. Lap infants receive no individual baggage entitlement. The one family-specific exemption is the diaper bag: per Allegiant Air's published policy, one diaper bag per traveling child is permitted free of charge and does not count toward the carry-on or personal item allowance. This dual-fee structure — both carry-on and personal item potentially charged — is the most aggressive baggage model among major US ultra-low-cost carriers. Budget accordingly before booking, and always verify current fee schedules at allegiantair.com.

According to Allegiant Air's published information, the carrier does not transport unaccompanied minors under the age of 15. No UM escort service, age-tiered program, or gate-pass system exists for passengers under 15 — this is a hard policy that applies on all Allegiant domestic and international routes. Children aged 15 through 17 may travel without an adult companion but are processed as standard adult passengers with no airline supervision. Parents who need a child under 15 to travel alone should use Spirit Airlines (UM accepted ages 5–14, USD 150 each way, non-stop routes) or Sun Country Airlines (UM accepted ages 5–14, USD 75 each way, non-stop routes). Always verify the current policy directly at allegiantair.com before booking any solo-child itinerary.

Per Allegiant Air's published fee schedule, both carry-on bags and personal items may be charged on non-elite fares under the carrier's A-La-Carte pricing model. Carry-on fees range from approximately USD 25 to USD 75 depending on route, timing of purchase, and fare type. Personal item fees range from approximately USD 0 to USD 35. This dual-fee structure is uniquely aggressive among US ultra-low-cost carriers — Frontier Airlines typically includes one free personal item, and Spirit Airlines similarly includes a free personal item while charging for carry-ons. The one family exception is the diaper bag: per Allegiant Air's published policy, one diaper bag per traveling child is free and does not count against any allowance. Fees are lowest when purchased at the time of initial booking; purchasing at the gate is the most expensive option. Always verify current fees at allegiantair.com.

Per Allegiant Air's published policy, families traveling with children under 2 years old may pre-board before the general boarding zones begin. This pre-boarding is automatic — no special request or fee is required. However, Allegiant is not on the US DOT Family Seating Dashboard's commitment list for free guaranteed seat adjacency, which means families who have not purchased assigned seats may be placed in separate rows by the system at check-in. Paid seat selection (approximately USD 5–30 per seat depending on route and position) is the only reliable way to guarantee that family members sit together. Gate agents may assist with reseating on request, but this is not guaranteed on full flights. Verify current boarding procedures at allegiantair.com before travel.

Per Allegiant Air's published policy, one stroller per fare-paying passenger may be gate-checked or counter-checked free of charge. This applies to umbrella strollers, full-size strollers, and double strollers — no published size or weight limit restricts the free stroller allowance. To gate-check, families walk through security with the stroller in use, push it to the boarding gate, and hand it to the gate agent at the jet bridge door before boarding. The stroller is loaded into the cargo hold and returned at the jet bridge upon arrival at most Allegiant airports. Allegiant's uniform A319/A320/A321 fleet supports jet-bridge stroller return at most major stations. Tagging the stroller at the ticket counter rather than the gate is recommended to avoid last-minute gate congestion. Verify current policy at allegiantair.com.

According to publicly available information as of May 2026, Allegiant Air and Sun Country Airlines have announced a merger deal expected to close approximately May 2026. The combined entity would unify two leisure-focused narrow-body carrier networks under one parent company, creating what would be the largest US leisure-focused carrier by route count. Per Allegiant Air's published policy, children do not fly free except as lap infants under 24 months. Passengers aged 2 and older pay the full prevailing adult fare — there is no published child fare discount on any Allegiant route or fare class. Occasional promotional 'Kids Fly Free' offers have appeared historically on select routes or bundled Allegiant Vacations packages (flight plus hotel), but these are time-limited marketing promotions, not a standing policy. The promotional fare may technically be listed as zero, but the overall bundle cost typically reflects the discount elsewhere. For families seeking a structural child-discount, European carriers such as Lufthansa (~20% on Standard fares) or Air France (up to 33% on long-haul Standard) offer published discounts. Always verify the booking total before purchase and confirm any promotional offer terms at allegiantair.com.

Per Allegiant Air's published policy, the airline does not offer a child fare discount for passengers age 2 and older — children travel at the full prevailing adult fare on Standard, Discount Den, and bundled fare types alike. This is consistent with US ULCC peers including Spirit, Frontier, Avelo, and Sun Country, none of which apply a child discount on standard fares. Lap infants under 24 months continue to fly free of base fare on US domestic and Caribbean/Mexico/Bahamas routes. The pending Allegiant + Sun Country merger (expected ~May 2026) is unlikely to introduce a child fare discount, given that neither carrier currently publishes one. For families seeking a child fare discount, European-legacy carriers (Lufthansa, Air France, KLM) and Asian-premium carriers (Singapore Airlines, ANA, JAL) publish ~20–33% discounts on Standard fares — Always verify the latest policy directly at allegiantair.com before booking.