Cabin dog + carrier limit varies by airline and route; verify the current limit before booking
Airline dog policy
Allegiant Air
Allegiant Air appears in DogAbroad route data as an observed operator on US leisure routes. Its published or airline-controlled pet pathway should be treated as schedule evidence plus a carrier to verify, not proof that a specific dog can travel on a specific flight.
Book early and confirm aircraft acceptance.
Under-seat dimensions can vary by aircraft.
Fees can change by region and currency.
Booking tip
Do not use Allegiant for cargo or large-dog travel. Ask for written confirmation of the exact operating carrier, date, aircraft, pet quota, dog weight, breed, carrier or crate size, handling method and destination documents before paying.
Why it can work
Allegiant Air can be useful when it is the direct operating carrier on US leisure routes. A direct confirmed operator can reduce transfer risk and interline handoffs, provided the airline accepts the dog and the destination authority accepts the arrival pathway.
Restrictions
Final acceptance depends on route, aircraft, live-animal quota, carrier or crate, dog age, breed, weather, transit countries and destination import rules. Small dogs and cats in cabin on domestic routes only.
Dog-owner notes
DogAbroad keeps this profile conservative because airline pet rules change and may differ between operating carriers, codeshares and local markets. Use the official policy page as the starting point, then confirm the booking directly with Allegiant Air before relying on it.
Final check before paying
Confirm the exact aircraft, route, dog breed, carrier size, temperature rules and destination import law directly with the airline. A country can allow dogs while a specific airline or aircraft refuses them.