Flying With Pets in Cabin in 2026: Fees and Carrier Rules

• One-way

  The pet fee is charged per way, per pet on each carrier's page

• Species

  Each airline limits which pets it accepts in the cabin

• Capacity

  In-cabin pet spaces are limited and filled early

• USDA/CDC

  Entry and health rules are separate from airline acceptance

Flying with a pet in the cabin is one of the most rule-dense parts of booking air travel, because the airline, the departure country and the destination country each set their own requirements. This page compares in-cabin pets only — small dogs and cats carried as companions — and keeps them distinct from trained service animals and from cargo. Fees are dated as of 12 August 2026 and must be read on the carrier’s live page, because the amounts change.

What an in-cabin pet costs and requires

The direct answer is that an in-cabin pet adds a dated, one-way fee per pet on top of the fare, subject to the carrier’s species, kennel, seat, route and capacity rules. No single number applies across airlines, and the fee is only part of the picture — you must also meet the destination’s entry rules. Because capacity is limited, reserving the pet space is a prerequisite, not an afterthought.

This page does not cover trained service animals, which are a separate category under federal and carrier rules, nor pets traveling as cargo. Keeping those three separate is what makes the in-cabin pet comparison accurate rather than misleading.

A pet is not a service animal

Confusing the two leads travelers to apply the wrong rules. A pet in a carrier under the seat is a product you pay for and reserve, subject to capacity. A trained service animal is not priced or capacity-limited the same way under the law. If you fly with a service animal, use the carrier’s service-animal terms; if you fly with a pet, the pet fee and capacity rules here apply.

Accepted species and kennel size

Each carrier lists which species it accepts in the cabin, and the common baseline is small dogs and cats. Some carriers accept a wider set and others are more restrictive, and the accepted species are stated on each airline’s pet page. Alongside species, carriers set a maximum kennel size that must fit under the seat in front of you, and the pet must stay in the carrier for the flight.

Because the species and size rules vary, the reliable step is to read the specific airline’s current pet page before committing. A pet that qualifies on one carrier may not on another, and a kennel that fits one aircraft may not fit another. The carrier’s stated dimensions and species list are the ground truth.

American in-cabin pets

American addresses in-cabin pets on its pets page, which states the species it accepts, the one-way fee for the date, and the kennel and seat placement rules. American also describes capacity limits and any route conditions. Because the fee is dated, the current page is the source for the exact amount on your travel date.

American’s pet terms tie the in-cabin pet to a specific seat placement and capacity, so the pet must be added to the itinerary when you book or as space allows. Read American’s live pet page for your route to confirm the species, fee and any restriction that applies to your dates.

Delta pet travel

Delta’s pet travel overview states its in-cabin pet rules, including accepted species, the one-way fee, kennel size and where the pet rides. Delta also sets route and capacity conditions on its pet page. As with all carriers, the fee is dated, so the live page gives the accurate amount for your travel date and route.

Delta restricts in-cabin pets by route and reserves capacity, so confirming your specific itinerary against Delta’s pet overview is the practical step. The species, fee and placement Delta lists apply to the pet product, and the destination’s entry rules are a separate layer the carrier does not approve.

United traveling with pets

United’s traveling-with-pets page sets out its in-cabin pet rules, including the one-way fee, accepted species, kennel dimensions and seat placement. United also states where in the cabin the pet may ride and any route or season restrictions. Because fees are dated, the live page is the source for the current amount.

United manages in-cabin capacity by the number of pets allowed on a flight, which means the pet space must be reserved and is not guaranteed after purchase. Reading United’s current pet page for your route and date, and reserving early, is what protects a trip with a pet in the cabin.

Southwest pets

Southwest’s pets page describes its in-cabin pet product, including the one-way fee, the types of pets accepted and the carrier rules. Southwest places accepted pets in a designated area of the cabin under the seat, and it limits how many pets can travel on a single flight. The fee is dated and set on the live page.

Southwest’s per-flight pet limit means the earlier you add the pet, the better. Because capacity fills before the fare does, treating the pet reservation as the primary booking step, rather than an add-on, is the reliable way to protect the trip.

Cabin capacity and why to reserve early

In-cabin pet capacity is limited on every carrier that offers it, and the number of pets per flight is set by the airline. That makes the pet space a scarce resource that fills as bookings accumulate. Paying for a pet does not create an unlimited seat, and it does not guarantee a spot once the flight’s pet allowance is full.

The practical consequence is sequencing. Reserve the pet space early — ideally before you buy a nonrefundable fare — because cabin capacity can be limited and may be gone by the time you are ready to book. A pet fee confirms the product exists; it does not guarantee a space after the flight’s allowance has been taken.

USDA and CDC entry rules, kept separate

USDA and CDC entry rules are separate from airline acceptance, and they are set by the agencies, not the carrier. USDA APHIS governs pet travel into the United States, with requirements that can depend on the species, origin country and destination. CDC separately sets import requirements for dogs entering the United States, which can depend on vaccination status and origin.

Because these health and entry rules change by species, origin and dates, they are not something the airline approves or one you can skip based on a carrier’s pet page. Before finalizing a trip, check the current USDA APHIS pet-travel guidance and the CDC dog-import guidance for your travel date and itinerary. The airline covers carriage; the agencies cover entry.

Route and seat restrictions

Route restrictions are common and vary by carrier. A carrier may allow in-cabin pets on one route and restrict them on another, with temperature-sensitive routes, certain aircraft and some international legs being frequent places restrictions appear. Each airline states its route conditions on its current pet page, so a policy that applies to one itinerary may not apply to another.

The seat and route details are settled per itinerary, not per airline. Confirming the specific route, aircraft and seat placement on the carrier’s live pet page is what turns a general pet policy into a reliable plan. Where a route is restricted, no pet fee can overcome the airline’s stated exclusion.

Compare the carriers

Every major U.S. carrier offers an in-cabin pet product with a dated one-way fee and own conditions, so the differences worth your attention are the specific species, kennel, route, capacity and fee at the time you travel. The table is a starting point; the live pet page for your itinerary is the decision.

A before-you-book checklist

1. Confirm the species. Check the airline accepts your pet in the cabin for your route.
2. Read the dated fee. Note the one-way amount on the carrier’s live page for your date.
3. Match the kennel. Make sure the carrier fits under the seat your aircraft offers.
4. Reserve capacity early. Add the pet space before you commit to a nonrefundable fare.
5. Confirm route restrictions. Verify your itinerary is not excluded on the carrier’s pet page.
6. Separate entry rules. Check USDA and CDC guidance for the destination, apart from the airline.

A pet in the cabin is a paid, capacity-limited product with each carrier’s own version of the rules. Keeping it separate from service animals and from the destination’s entry requirements, reading the dated fee, and reserving early are what protect a trip with a pet. The carry-on size guide is a useful companion when you are choosing a kennel that fits a personal-item space. Flights with a pet also interact with infant-in-lap rules when children travel alongside, and the REAL ID guide confirms the documents a traveler needs regardless of the pet.

In-cabin pet travel comes down to a dated fee, accepted species, a fitting kennel and limited capacity, all set by the carrier, plus entry rules set by the agencies. Reading the live pet page for your route, reserving the space before the ticket, and keeping the health rules separate are the three steps that make flying with a pet go smoothly.