Moving to Puerto Rico with Pets: Procedures and Practical Tips

Published on March 5, 2026 and written by Cyril Jarnias

Moving to Puerto Rico with your dog or cat combines the challenges of a classic expatriation with those of an international relocation… without legally leaving the United States. A U.S. territory but an isolated tropical island, Puerto Rico applies both federal regulations and its own, often stricter, health rules. The result: the journey for an expatriate with a pet resembles a labyrinth of veterinary certificates, airline policies, and climatic constraints.

Understanding the General Framework: An “Internal Move” with International Constraints

Puerto Rico is a U.S. Commonwealth located in the Caribbean. For a departure from the American mainland, arrival is considered an internal movement, not a classic import. However, in practice, the procedure resembles an import because:

For pet owners, this means two essential things: 1) never rely solely on the airline’s requirements; 2) systematically check the rules of the PRDA and, if applicable, the CDC and USDA APHIS.

Health Procedures for Dogs and Cats: The “Pet Passport” Puerto Rico Version

For dogs and cats coming from the U.S. mainland or another U.S. state or territory, the good news is clear: there is no mandatory quarantine if entry conditions are met. The “pet passport” to Puerto Rico is not a single document but a set of papers.

Official Health Certificate: The Pivotal Document

All dogs and cats must be accompanied by an official health certificate, often called a Certificate of Veterinary Inspection (CVI). This certificate:

– must be signed by an accredited veterinarian in the state or territory of departure;

– is valid for 30 days from the date of examination;

– for air travel, many airlines require it to be issued within the 10 days preceding the flight, to certify that the animal is fit to travel.

The certificate must notably mention:

– a precise description of the animal (species, breed, sex, age, color, identification);

– confirmation that the animal does not come from a rabies quarantine area;

– vaccination dates (including rabies) and parasite treatments;

– a clinical statement indicating that the animal is free from symptoms of infectious or contagious diseases.

Rabies Vaccination: The Red Line Never to Cross

This is the most sensitive requirement. The PRDA mandates that:

– all dogs and cats over 4 months old be vaccinated against rabies;

– the rabies vaccination was administered within the 6 months preceding shipment to Puerto Rico;

– the rabies vaccination certificate accompanies the animal.

In practice:

– if you are traveling from the American mainland, ensure you schedule or update the rabies vaccine between 1 and 6 months before departure;

– for an animal coming from a third country, you must additionally check the CDC rules on dogs entering the United States (minimum age, microchip, CDC Dog Import form, possible rabies titer requirement depending on the country of origin).

Puerto Rico does not require a rabies titer (antibody level test) for dogs and cats, but this test is highly recommended if the animal arrives from a country classified as high risk for rabies. It does not exempt from vaccination.

Other Recommended Vaccinations and Treatments

Even if the PRDA does not formally require them as an entry condition for dogs and cats, authorities as well as animal protection associations and veterinarians strongly recommend:

These vaccines are particularly relevant in Puerto Rico, where:

– extreme climate events (hurricanes, floods) promote the gathering of animals in shelters and thus the contagion of diseases like distemper;

– proximity to many stray animals increases infectious risks.

Parasite Treatments: A Requirement Before Embarkation

The PRDA requires treatment against external parasites (fleas, ticks, etc.) within the 72 hours preceding entry into Puerto Rico. This information must appear on the health certificate.

It is highly advisable to combine this external treatment with:

– an internal deworming (nematodes, cestodes);

– a heartworm prevention, particularly crucial in a tropical climate where mosquitoes are present year-round.

Dogs, cats, and ferrets living in Puerto Rico are constantly exposed to mosquitoes, fleas, and ticks. Studies conducted on the island show that:

Integrating a year-round prevention protocol (flea/tick pills or spot-on, monthly heartworm prevention) with your veterinarian from the start is therefore a key part of your expatriation project.

Identification: Microchip or Tag, but Identification is Mandatory

For dogs and cats, the PRDA requires an official individual identification:

– either an ISO 11784/11785 compliant microchip (15 digits);

– or a collar with a metal identification tag.

In the practice of expatriation, the microchip is by far the most reliable solution because:

– it is required by the CDC for dogs entering the United States starting August 2024;

– it facilitates any subsequent repatriation or travel to another country.

If your microchip is not ISO, you will need to provide a compatible reader during checks.

In addition to the microchip, it is recommended:

– to equip the dog or cat with a sturdy collar with two tags (permanent address and local contact in Puerto Rico);

– to write a phone number in permanent marker on the collar, protected by clear adhesive tape.

American Requirements (CDC, USDA): An Added Layer of Complexity for Dogs

The CDC (Centers for Disease Control and Prevention) has strengthened the rules for importing dogs into the United States. This concerns:

– dogs arriving in Puerto Rico from a foreign country;

– dogs that have stayed in a high-risk rabies country in the previous 6 months.

The main principles:

For dogs originating from or transiting through a high-risk country, American Airlines for example refuses their transport in the cabin as a “pet,” except for assistance dogs meeting CDC requirements.

Before planning a future return to the American mainland, it is therefore essential to consider this CDC framework, especially if you travel frequently with your dog outside U.S. territory during your expatriation.

Flight to Puerto Rico: Airlines, Cabin, Cargo, and Weather Constraints

Traveling with a pet to a tropical island involves juggling:

– rules specific to each airline (size, weight, breeds, types of crates, fees);

– temperature restrictions for transport in the hold or as cargo;

– flight duration limits for animals traveling as cargo.

American Airlines, Delta, Spirit: What Do They Offer for Puerto Rico?

Several major U.S. airlines serve Puerto Rico and accept pets.

American Airlines

American Airlines accepts pets to Puerto Rico:

– in the cabin (“carry‑on pet”) for small cats and dogs that meet carrier dimensions;

– as cargo (American PetEmbark®) for animals too large or unable to travel in the cabin;

– as checked baggage only for active-duty military and U.S. State Department diplomats traveling on official orders (limited to 2 pets, with a specific fee).

The main conditions for a “carry-on” pet:

– species: dog or cat only;

– age: at least 8 weeks for travel within the United States and to Puerto Rico;

– the animal must be fully contained in a carrier placed under the seat in front of the passenger for the entire flight;

– one carrier per passenger, and in addition, only one other carry-on item (personal item or carry-on bag);

– the fee for a pet in the cabin is 150 USD per kennel, per trip segment.

Maximum dimensions for in-cabin carriers:

Carrier Type	Max Dimensions (inches)	Max Dimensions (cm)	Notes
Soft-sided (recommended)	18 x 11 x 11	46 x 28 x 28	All AA flights
Hard-sided – “mainline” flights (e.g., B737, B777)	19 x 13 x 9	48 x 33 x 22	Must fit under seat
Hard-sided – American Eagle	16 x 12 x 8	40 x 30 x 20	Regional aircraft

Certain seats are prohibited for passengers with pets (exit rows, bulkhead rows, some first/business class seats without under-seat space, e.g., seat 13D on A321NEO).

Animals too large for the cabin must travel via American Airlines Cargo / PetEmbark. The rules then become more strict:

– combined weight of crate + animal ≤ 100 lb (45 kg) for certain domestic services;

– sturdy crate, large enough for the animal to stand up, turn around, sit, and lie down naturally, with a secure closure system, waterproof, ventilated on 3 sides (4 for international);

– water and food bowls attached inside, a small bag of food for 24h attached to the crate;

– shipping cost depends on size, weight, and route, with a “Live Animal” handling surcharge of approximately 150 USD per air waybill.

Temperature limits apply:

– no transport in hold/cargo if ground temperature exceeds 85°F (29.4°C) at any airport on the journey;

– no transport if it is below 45°F (7.2°C), except with a veterinary acclimation letter specifying the minimum tolerated temperature (but never below 20°F / –6.6°C);

– for some very hot airports (Phoenix, Tucson, Las Vegas, Palm Springs), no animals in the hold from May to September.

Finally, American Airlines, like other carriers, refuses the transport of brachycephalic breeds (bulldogs, boxers, Pekingese, Persians, etc.) in the hold due to increased respiratory risks.

Delta Air Lines

Delta allows small dogs, cats, and domestic birds in the cabin on domestic flights, including to Puerto Rico, for a one-way fee:

Route	Fee per segment (tickets issued before April 8, 2025)	Fee per segment (tickets issued after)
U.S./Canada/Puerto Rico/U.S. Virgin Islands	95 USD/CAD	150 USD/CAD
International	200 USD/CAD/EUR	200 USD/CAD/EUR
Brazil	75 USD (before)	200 USD (after)

The conditions:

Delta has, moreover, temporarily suspended most animal transport via Delta Cargo, except for military and diplomats on official duty.

Spirit Airlines

Spirit accepts small domestic dogs and cats in the cabin on all its domestic flights, including to Puerto Rico and Saint Thomas:

– maximum 6 containers per flight;

– 1 container per passenger, which can contain up to 2 compatible animals;

– the animal must remain in a soft-sided carrier under the seat, maximum dimensions 18 x 14 x 9 inches (≈ 46 x 36 x 23 cm);

– the carrier counts as a carry-on bag;

– minimum age: 8 weeks, weaned, non-aggressive, odorless, not requiring care during the flight;

– Spirit does not transport any animals in the hold, only in the cabin.

The airline requires a rabies vaccination certificate for animals destined for Puerto Rico, even though it does not require a health certificate for most other domestic flights.

How to Choose Your Airline and Mode of Transport?

The choice depends on several parameters:

In many cases, for a medium or large dog, using a specialized pet shipper (a member of IPATA, for example) allows you to:

– secure the cargo reservation;

– ensure the crate is IATA compliant;

– manage any customs checks for animals coming from third countries.

Sedation: False Good Idea, Real Risk

Airlines and organizations like the American Veterinary Medical Association (AVMA) are categorical: sedating or tranquilizing an animal for air travel is discouraged. At altitude, the effects of sedatives on breathing and circulation are unpredictable and can cause serious complications.

It is better to:

– get the animal used to its crate several weeks before departure (playing, treats, meals in the crate);

– use gentler solutions (pheromones, calming supplements, a blanket carrying the scent of home).

Arrival in San Juan: Health Checks and Formalities

Animals arriving in Puerto Rico by air, especially those coming from outside the United States, are checked at San Juan International Airport (Luis Muñoz Marín – SJU).

The main steps of the procedure:

– 1. Documentary check:

– valid health certificate (less than 30 days old, and often less than 10 days for the airline);

– rabies vaccination certificate;

– proof of parasite treatments;

– for dogs from third countries, receipt of the CDC Dog Import form plus any additional documents.

– 3. Decision:

– if everything is compliant, the animal is admitted without quarantine;

– if items are missing or a risk is identified, the options are: quarantine, return to the country of origin, or euthanasia – always at the owner’s expense.

It is recommended to notify the airport veterinary service (PRDA) in advance if arrival is outside office hours, so that an agent is available for inspections.

Living with a Pet in Puerto Rico: Climate, Health, and Specific Risks

Puerto Rico enjoys a warm, humid tropical climate, with average temperatures around 84°F (29°C) in lowlands and 70°F (21°C) in mountainous areas. For companion animals, this paradisiacal setting can become dangerous without precautions.

Heat and Humidity: The Couple to Monitor

Climate studies show that:

– temperatures in Puerto Rico have already increased by about 2°F since 1950;

– heat waves are multiplying, with heat indexes that can reach 115°F (47°C) in summer, especially in very humid conditions.

For dogs in particular: breeds, care, diet, and training are essential aspects to consider for their well-being.

– cooling through panting is much less effective in humidity-saturated air;

– brachycephalic breeds, older animals, obese, or cardiac animals are particularly vulnerable.

The risks of hyperthermia are major:

– in a parked vehicle: the interior temperature can go from 70°F to nearly 90°F (21°C to 32°C) in 10 minutes and continue to rise, quickly causing irreversible damage;

– outdoors, without shade or fresh water, especially on burning sidewalks and beaches.

– Signs of heat stroke in an animal:

– Hyperventilation: The animal breathes rapidly and with difficulty.

– Excessive salivation: Abnormal saliva production may be observed.

– Tachycardia: Increased heart rate.

– Lethargy: The animal seems weak, apathetic, or less responsive.

– Vomiting: Episodes of vomiting may occur.

– Confusion or disorientation: The animal may have difficulty moving or responding.

– Elevated body temperature: A temperature above normal (generally around 102-106°F / 39-41°C for dogs and cats).

– Warm, dry skin: A feeling of heat on the skin, especially for short-haired animals.

– excessive panting, difficult breathing;

– profuse salivation, vomiting, diarrhea;

– weakness, coordination problems, agitation or incoherent behavior;

– collapse, seizures.

– immediately move the animal to the shade, in a ventilated area;

– wet it with cool but not ice-cold water (sponge, damp towels);

– monitor breathing, and go urgently to a veterinarian if the signs do not subside very quickly.

Mosquitoes, Vector-Borne Diseases, and Leptospirosis

Puerto Rico is highly exposed to mosquito-borne diseases (dengue, Zika, chikungunya in humans), and the same conditions favor the spread of heartworm in dogs, cats, and ferrets.

Climate changes, with:

– an increase in minimum temperatures,

– episodes of intense rain followed by stagnant water,

amplify mosquito proliferation and lengthen the transmission season.

Leptospirosis, a bacterial disease transmissible from animals to humans (zoonosis), is also described as endemic on the island, with an increased risk in flood-prone areas or after extreme events like Hurricane Maria. A study in the Caño Martín Peña area showed a seroprevalence of 27.2% among residents.

For expatriates with pets, this implies:

– including leptospirosis in the vaccination protocol for dogs (combined L vaccine);

– limiting animal access to stagnant water (puddles, canals, flooded areas);

– not letting dogs drink from rivers or puddles after heavy rains.

Fleas, Ticks, and Other Parasites: A Permanent Problem

In a humid tropical climate, fleas and ticks proliferate year-round. Veterinary work in Puerto Rico estimates that:

– diseases related to fleas account for more than 35% of small animal veterinary activity;

– over half of dermatological cases in dogs are related to fleas (allergies, infections, anemia, tapeworm transmission).

Practical advice:

– use continuous parasite protection (spot‑on, pills, collars);

– inspect the animal after each outing, especially around the belly and base of the tail;

– maintain the yard (short grass, shaded areas) to limit habitats favorable to ticks;

– consider an environmental treatment (house, car) in case of infestation.

Hurricanes and Emergency Preparedness for Pets

Puerto Rico is highly exposed to hurricanes and tropical storms. On average, a tropical storm strength cyclone passes nearby every 5 years, and a hurricane every 11 years. Hurricane Maria in 2017 left the island devastated, with millions of people without electricity for months and a massive impact on animals.

– an evacuation plan including pets;

– an emergency kit for at least 5 to 7 days, composed of:

– food and water, bowls;

– medications and prescriptions;

– leash, harness, collar with ID;

– crate or carrier;

– first aid kit (bandages, disinfectant, gloves);

– litter or waste bags;

– copies of veterinary certificates, vaccines, microchip;

– recent photo of the animal (useful in case of loss).

The CDC and the Humane Society also recommend:

– identifying in advance accommodations that can accept pets (friends, family, hotels, boarding facilities, shelters);

– to never leave animals outside during a hurricane;

– to keep dogs on a leash and cats in a crate after the storm passes, due to debris, disoriented wildlife, and unstable infrastructure.

Veterinary Network and Animal Rescue: A Major Asset of Puerto Rico

The island has a dense network of general veterinary clinics, 24/7 emergency hospitals, and specialist centers.

Veterinary Hospitals and Emergencies

Among the key facilities:

On the West Coast and the rest of the island, several 24/7 or extended hours clinics:

– Ramey Veterinary (Aguadilla);

– Cabo Rojo Animal Medical Hospital (Cabo Rojo), large and small animals;

– Hatillo Hospital Veterinario San Francisco de Asís (Hatillo), 24/7 hospital for large and small animals;

– Banfield Pet Hospital – Plaza Rio Hondo (Bayamón), integrated into a PetSmart, with preventive services, routine surgery, imaging, and wellness plans.

This offering allows expatriates to have access to: essential services, support resources, and professional opportunities.

– routine care (vaccines, check-ups, sterilizations);

– emergencies 24/7 in major urban areas;

– specialized services (orthopedic surgery, oncology, ophthalmology, advanced imaging).

Associations and Shelters: Understanding the Local Reality

The state of animal welfare in Puerto Rico remains fragile: stray dogs (satos), feral cats, abandoned horses, and released former pet iguanas are common. Several elements structure this context:

For an expatriate, this implies: the necessity to adapt to a new culture, managing language differences, understanding local laws, and establishing a social network. It can also include searching for new housing and adjusting to a different living environment.

– to be confronted with a massive presence of stray animals;

– to be able, if desired, to engage with the associative network (volunteering, fostering, donations);

– to understand that abandoning animals is a crime and that there are recourses (municipal police, associations) in case of observed abuse.

Finding Accommodation with a Pet: A Very “Pet‑Friendly” Rental Market

Another pleasant surprise: the rental market in Puerto Rico includes many pet‑friendly accommodations:

– more than 300 pet‑friendly apartments listed;

– dozens of single‑family homes for rent accepting dogs and cats;

– more than 1,500 to 1,600 “pet‑friendly” vacation rentals listed on major short‑term rental platforms.

Several points to keep in mind:

Many vacation rentals (beach houses, villas, mountain cabins) are well-suited for a “test” phase expatriation with pets, particularly in areas like Rincón, Luquillo, Dorado, Arecibo, Ponce or the outskirts of San Juan. Some offer:

– fenced gardens or direct beach access;

– reviews from previous travelers with dogs, valuable for assessing the true tolerance towards pets.

Practical Tips Before, During, and After the Trip

To ensure your expatriation with a pet to Puerto Rico remains a joyful adventure rather than an obstacle course, some best practices emerge from experience feedback, veterinary recommendations, and official texts.

Before Departure

– Plan early: start veterinary procedures at least 30 days before departure, or more if you are arriving from a third country or have to comply with the new CDC rules for dogs.

– Choose an accredited veterinarian who knows travel certificates and can correctly mention all information required by the PRDA (vaccines, parasite treatment ≤ 72 h, absence of diseases).

– Update the vaccination protocol: in addition to rabies, discuss leptospirosis, distemper, parvovirus, FVRCP, heartworm.

– Install an ISO microchip if not already done, and verify that all documents bear the same number.

– Get the animal used to its travel crate gradually:

– leave the crate open at home, place treats inside, have meals inside;

– take short car rides with the animal inside.

– Prepare a travel folder: paper and digital copies of all certificates, prescriptions, test results, contact details of authorities (PRDA, veterinarians in Puerto Rico, airline, insurance).

During the Trip

– Arrive early at the airport (at least 2 hours in advance for a flight with a pet, more for cargo arrangements);

– Limit food 4 to 6 hours before the flight, to reduce the risk of nausea, while allowing access to water until departure;

– plan for a non‑spill bowl or a special crate bottle system;

– keep copies of all documents with you (do not put them in checked luggage);

– never sedate the animal without formal veterinary indication and full knowledge of the risks… and knowing that the airline may refuse an obviously drugged animal.

When Settling in Puerto Rico

– Choose a local veterinarian within the first few weeks, do a basic check‑up, share previous medical reports (bloodwork, vaccines, treatments);

– adapt the routine to the heat:

– walks early in the morning and in the evening;

– avoid burning sidewalks at midday;

– always carry water and a collapsible bowl;

– establish year‑round parasite and heartworm prevention, with scheduled reminders;

– identify the closest emergency clinics to your home and save the numbers in your phone.

Managing Interactions with Local Wildlife and Stray Animals

– keep dogs on a leash in urban or tourist areas, where the density of satos (stray dogs) is high;

– avoid prolonged direct contact with street animals, to reduce the risk of bites, fights, and transmission of parasites or diseases;

– report situations of obvious abuse or animal distress to local shelters or municipal police, reminding them of the existence of Law 154.

Conclusion: A Demanding Expatriation, but Entirely Feasible

Taking your dog or cat to Puerto Rico involves dealing with:

– precise administrative formalities (health certificate, vaccines, parasite treatments, identification);

– variable airline rules depending on the carrier (carrier dimensions, fees, weight limits, breed restrictions);

– a tropical environment rich but demanding for animal health (heat, mosquitoes, parasites, hurricanes).

In return, the island offers:

With rigorous preparation, good coordination between your veterinarian, the airline, and Puerto Rican authorities, and real anticipation of climatic challenges, expatriating to Puerto Rico with a pet is not only possible but can be done under good conditions for you and your companion.

The key word: anticipate. Certificates, microchip, vaccines, travel crate, flight choice, adaptation to the tropics… everything requires preparation. Once these boxes are checked, all that’s left is to enjoy, responsibly, the Caribbean life with your animal by your side.