Travel plans feel very different when a pet is part of the journey. Flights need extra thought, carriers must meet airline rules, and timing suddenly matters a lot more. The United Airlines Pet Policy is designed to make pet travel possible while keeping safety front and center for animals, passengers, and crew. Knowing the details ahead of time helps avoid last-minute stress at the airport and ensures pets travel as comfortably as possible.

This guide breaks down United Airlines’ pet rules in plain language, covering in-cabin pets, cargo travel, fees, carrier requirements, and important tips for a smooth experience.

Overview of United Airlines Pet Policy

United Airlines allows certain pets to travel either in the cabin or as cargo, depending on the animal’s size, breed, destination, and travel conditions. Unlike some airlines, United no longer accepts pets as checked baggage. Instead, pets either stay in the cabin with the passenger or travel through United Cargo under specific guidelines.

The policy focuses heavily on animal safety, which means restrictions are common for international routes, hot or cold weather, and snub-nosed breeds.

Types of Pets Accepted on United Airlines

Under the United Airlines Pet Policy, the most commonly accepted pets include:

• Cats

• Dogs

Other animals are generally not accepted as pets on passenger flights. Service animals follow separate rules and are not covered under standard pet travel guidelines.

In-Cabin Pet Travel With United Airlines

Pets Allowed in the Cabin

Small cats and dogs may travel in the cabin on most United and United Express flights within the United States and select international routes. The pet must remain inside an approved carrier for the entire flight.

In-Cabin Size and Weight Rules

United does not publish a specific weight limit, but the pet must comfortably fit inside the carrier without touching the sides or top. The carrier must fit completely under the seat in front.

Typical under-seat dimensions vary by aircraft, but soft-sided carriers usually offer the best fit.

Pet Carrier Requirements for In-Cabin Travel

Approved carriers under the United Airlines Pet Policy must meet these guidelines:

• Soft-sided or hard-sided carriers are allowed

• Leak-proof bottom

• Proper ventilation on at least two sides

• Secure closure with no risk of escape

Only one pet per carrier is allowed, and the carrier counts as a carry-on item.

In-Cabin Pet Fees

United Airlines charges a pet fee per flight segment for pets traveling in the cabin. Fees may vary based on route and destination, but they are typically paid at the airport during check-in.

Fees are non-refundable once travel begins, even if plans change.

United Airlines Pet Policy for Cargo Travel

United Cargo Pet Program

Larger pets or pets that cannot fit under the seat must travel through United Cargo. This is the only option for animals not eligible for in-cabin travel.

United Cargo has stricter rules compared to cabin travel, including health documentation, kennel standards, and temperature regulations.

Cargo Kennel Requirements

Kennels for cargo pets must meet International Air Transport Association (IATA) standards:

• Hard-sided construction

• Secure locking mechanism

• Adequate ventilation on all sides

• Absorbent bedding

• Separate food and water dishes attached inside

The pet must be able to stand, turn around, and lie down comfortably.

Breed Restrictions Under United Airlines Pet Policy

Snub-Nosed Breeds

United Airlines has specific restrictions for brachycephalic (snub-nosed) dog and cat breeds due to breathing risks. These breeds are generally not accepted for cargo travel and may face limits even in the cabin.

Commonly restricted breeds include:

• Bulldogs

• Pugs

• Boxers

• Persian cats

• Himalayan cats

Policies may change based on weather and destination.

Age Requirements for Traveling Pets

United requires pets to meet minimum age requirements:

• Puppies and kittens must usually be at least 8 weeks old

• Must be fully weaned

• Must meet destination health requirements

International travel may require older age minimums.

Health Certificates and Documentation

Health documentation is a major part of the United Airlines Pet Policy, especially for cargo and international travel.

Typical requirements include:

• Veterinary health certificate

• Proof of vaccinations (especially rabies)

• Import permits for international destinations

Some destinations have quarantine rules, which are the passenger’s responsibility to research.

International Travel With Pets on United Airlines

Traveling internationally with pets involves more steps than domestic flights. Each country has its own entry requirements, and United Airlines enforces them strictly.

Important considerations include:

• Country-specific vaccination timelines

• Microchip requirements

• Import permits

• Quarantine regulations

United may refuse pet transport if documentation is incomplete or incorrect.

Weather Restrictions for Pet Travel

Animal safety is heavily affected by temperature. United Airlines enforces weather-based restrictions, especially for cargo pets.

• High heat or extreme cold may suspend cargo pet travel

• Certain routes may be restricted seasonally

• Short-nosed breeds are most affected

These rules are non-negotiable and may change quickly based on forecasts.

Booking a Flight With a Pet on United Airlines

In-Cabin Pet Reservations

In-cabin pet reservations must be made in advance. United limits the number of pets allowed in the cabin per flight, so early booking is strongly recommended.

Cargo Pet Reservations

Cargo travel must be arranged directly through United Cargo, often well before the travel date. Space availability varies by aircraft and route.

Check-In Process for Pets

Arriving early at the airport is essential when traveling with a pet.

For in-cabin pets:

• Check in at the airport counter

• Pay the pet fee

• Carrier inspection may be required

For cargo pets:

• Drop-off occurs at a cargo facility

• Documentation is verified carefully

• Pets are checked in separately from passengers

Seating Restrictions With In-Cabin Pets

Pets are not allowed in certain seating areas:

• Exit rows

• Bulkhead seats

• Some premium cabins

Seat assignments may need adjustment at check-in.

MileagePlus and Pet Travel

United’s MileagePlus program does not allow miles to be used for pet fees. Pet travel charges are separate from ticket fares and must be paid using standard payment methods.

Tips for Traveling Comfortably With Pets

A little preparation goes a long way when flying with animals.

• Choose a soft-sided carrier for flexibility

• Avoid feeding pets right before the flight

• Include familiar bedding or toys

• Exercise dogs before arriving at the airport

• Double-check documentation requirements

Calm, prepared pets tend to travel much better.

Common Reasons Pets Are Denied Travel

Even with planning, pets may be denied boarding if:

• The carrier does not meet size requirements

• Documentation is incomplete

• Breed restrictions apply

• Weather conditions are unsafe

• Cabin pet limits are reached

Understanding the United Airlines Pet Policy in advance helps prevent these issues.

Changes and Refunds Related to Pet Travel

Pet fees are typically non-refundable once travel begins. If a flight is changed, pet reservations must be reconfirmed, as availability does not always carry over automatically.

Cargo bookings may involve separate change or cancellation rules.

Comparing United Airlines Pet Policy With Other Airlines

United Airlines focuses strongly on safety and compliance. While this means more rules, it also means clearer standards for pet well-being. Compared to airlines that still allow checked pets, United’s cargo program follows stricter handling procedures.

Final Thoughts on United Airlines Pet Policy

The United Airlines Pet Policy balances flexibility with safety, offering in-cabin options for small pets and a structured cargo program for larger animals. While the rules may feel detailed, they are designed to protect pets throughout the journey.

Planning early, choosing the right carrier, and understanding route-specific rules make all the difference. With the right preparation, flying with pets on United Airlines can be a smooth and manageable experience, allowing furry companions to arrive safely at their destination right alongside their humans.