Frontier Airlines
Pet travel policy for Frontier Airlines (F9) — based at Denver (DEN), United States.
Policy summary
Frontier Airlines accepts cats, dogs, rabbits, guinea pigs, and small household birds in the cabin on every Frontier flight within the United States, the US Virgin Islands, the Dominican Republic, and Mexico. The carrier must fit under the seat in front of you with maximum dimensions of 18 by 14 by 8 inches; soft-sided carriers can be slightly over the rigid limit if they compress to fit. The fee is 99 USD per pet, each way, paid online when you add the pet to your booking through the Frontier Airlines manage-trip page. Two pets of the same species may share one carrier if they fit comfortably. Frontier does not operate a cargo program, so checked-baggage pet shipping is not available; this also means there are no breed restrictions because no animals travel in the hold. International itineraries to Mexico and the Dominican Republic require a destination-country health certificate completed within five to 10 days of travel.
Quick reference
| Cabin pets | Yes — cats & small dogs in approved under-seat carrier |
|---|---|
| Cargo / checked program | Not currently offered |
| Cabin fee (one-way) | $99 USD (typical, route-dependent) |
| Carrier max dimensions | 18 x 14 x 8 in |
| Weight limit | pet must stand and turn |
| Breed restrictions | Cabin only; no checked or cargo program. |
| Reservations | 1-801-401-9000 |
| Hub airport | Denver (DEN) |
| Country | United States |
How to book a pet on Frontier Airlines
Almost every airline requires you to add a pet to your reservation by phone — there is no online self-service for in-cabin or cargo pets at the major carriers, because the airline must confirm there is space on the specific aircraft type and route. Call 1-801-401-9000 within 24 hours of buying your ticket and ask the agent to add the pet to your booking. You will be quoted the fee at the time of booking and pay it at airport check-in. Bring printed proof of vaccinations and a recent veterinary health certificate, especially for international itineraries.
At the airport, plan to arrive 90 minutes before a domestic departure or three hours before an international departure. The airline gate agent will inspect your carrier, attach an in-cabin pet tag, and confirm that your pet meets the under-seat dimension and weight limits. If your animal is travelling in cargo, you will drop them off at the carrier's dedicated cargo-acceptance facility (separate from the passenger terminal) at least four hours before departure for kennel inspection and loading.