17x13x8 Frontier Allegiant Airlines Approved Expandable Pet Carrier

In this review of the 17x13x8 Frontier Allegiant Airlines Approved Expandable Pet Carrier the bottom line is simple: this is a purpose-built, low-profile carrier for extra-small dogs and small cats that need to travel in-cabin on Frontier or Allegiant. It is best for pets shorter than 16 in and weighing up to 5 lbs, and the single biggest reason to consider it is the 3 in expandable top that gives pets more headroom while keeping the bag low enough to slip under strict airline seats when collapsed. The review focuses on fit, build, and travel practicality for short trips and airline compliance.

Key Features

• Airline-sized low profile: The 17 in x 13 in x 8 in dimensions are tailored to meet Frontier and Allegiant under-seat requirements so it will fit under tight cabin seats when collapsed.
• Expandable top: The 3 in pop-up top adds breathing room and visibility for a nervous pet without compromising the low height needed for boarding.
• Reinforced structure: Two metal frames and a hard wood bottom pad keep the carrier stable and prevent collapse during handling and moves.
• Safety features: Double zipper locks, an interior tether, and anti-scratch mesh help secure a pet during travel and reduce escape risk.
• Travel convenience: A washable soft bottom pad, adjustable shoulder strap, and two zip pockets make short trips and vet runs easier to manage.
• Airline compatibility notes: While designed for Frontier and Allegiant, the carrier is also acceptable for some other airlines with 8 in or taller under-seat space but not recommended for carriers requiring more headroom.

Who It's For

This carrier is aimed at owners of very small dogs or small cats that measure less than 16 in from nose to tail and weigh up to 5 lbs, who need a compliant, low-profile bag specifically for Frontier and Allegiant flights. It is a practical choice for frequent short flights, airport transfers, and brief car trips such as vet visits where a stable, compact carrier is important.

Owners of larger small-breed dogs, pets longer than 16 in, or those who want a taller 9 in interior for more standing room should look elsewhere. It is not suitable for airlines that require wider or taller under-seat dimensions or for long journeys where extended comfort is needed.

Pros & Cons

Pros

• Meets Frontier and Allegiant size limits and fits under strict seats when collapsed.
• Expandable top with 5-sided mesh provides airflow and a 360 degree view for the pet.
• Sturdy build with metal side frames and a hard bottom pad prevents sagging and collapse.
• Convenient pockets, washable pad, and shoulder strap improve travel usability.

Cons

• Low 8 in height limits use to very small pets and is not ideal for larger small-breed dogs.
• Not approved by some airlines with different width or height rules, so always check airline requirements before travel.

Specifications

Our Verdict

For owners of tiny dogs or cats who need a compliant under-seat carrier for Frontier or Allegiant, this bag offers focused value: low-profile dimensions for boarding, a practical expandable top for comfort, and solid construction to prevent collapse. It is a sensible, no-frills travel carrier for short trips and airline commutes, but anyone with a larger pet or need for more interior height should choose a different model.

Frequently Asked Questions

Will this carrier fit my airline seat?
It is designed to conform to Frontier and Allegiant under-seat size limits (17 in x 13 in x 8 in collapsed); check your airline's current requirements before travel.

What pet size works best?
Best for extra-small dogs or small cats shorter than 16 in and weighing up to 5 lbs; length is the primary measure to confirm fit.

Is the interior bedding washable?
Yes, the soft bottom pad is removable and washable for easy cleaning after short trips.