Houston's two major airports, George Bush Intercontinental (IAH) and William P. Hobby (HOU), connect pet owners to dozens of domestic and international destinations. Flying with a cat, dog, or even a small bird doesn't need to be a nerve‑wracking experience when you understand what each carrier offers. The right choice depends on your pet’s size, temperament, destination, and your budget. Some airlines excel at in‑cabin travel for small animals, while others have robust checked baggage or cargo programs for larger breeds. Before you book, know the policies inside out—fees, carrier dimensions, health documentation, and seasonal embargoes can all affect your trip.

Top Airline Options for Pets from Houston Airports

Almost every major airline flying out of IAH and HOU accommodates pets in some fashion, but the depth of service varies widely. Delta Air Lines and JetBlue consistently earn praise for clear in‑cabin policies and attentive staff. American, Southwest, and United each have unique strengths, from lower fees to specialized cargo handling. Whether you’re taking a short hop to Dallas or a long‑haul flight to Tokyo, matching the airline to your pet’s needs is the first step.

One universal rule: space for in‑cabin pets is strictly limited. On most narrow‑body aircraft only four to six animals are allowed per flight, and reservations are first‑come, first‑served. Booking early—ideally at the same time you purchase your own ticket—dramatically reduces the risk of being turned away at the gate. The sections below walk through the specifics for each carrier, so you can compare fees, carrier size limits, and any breed or seasonal restrictions.

In‑Cabin Pet Policies for Travelers out of Houston

For many pet owners, keeping a small dog or cat under the seat is the only acceptable way to fly. It avoids the stress of separation, temperature fluctuations, and baggage‑handling noise that can accompany cargo travel. Most airlines require an approved soft‑sided or hard‑sided carrier that fits completely beneath the seat in front of you. The carrier counts as a carry‑on item, and your pet must remain zipped inside for the entire flight, from boarding to deboarding.

Weight limits usually range from 15 to 20 pounds including the carrier, though enforcement varies. This section breaks down what you can expect from the airlines Houston flyers rely on most.

Delta Air Lines

Delta’s in‑cabin pet program is one of the most comprehensive for flights departing Bush Intercontinental. Small dogs, cats, and household birds are welcome on most domestic routes, and the carrier allows one pet per passenger. The maximum carrier size for soft‑sided kennels is 18″ long × 11″ wide × 11″ high, though the recommended bag from many pet‑travel suppliers is slightly smaller to guarantee under‑seat stowage.

Fees are $95 each way for travel within the United States, Canada, and the U.S. Virgin Islands, and $200 each way for most international itineraries. Delta does not transport pets as checked baggage; instead, larger animals must travel through Delta Cargo, a separate service that operates with climate‑controlled vehicles and dedicated staff. If your pet’s breed is brachycephalic (or snub‑nosed)—such as a Persian cat or a Bulldog—Delta prohibits them from cargo entirely, but in‑cabin travel for these breeds is permitted as long as they fit the size constraints.

You must call Delta Reservations or use the “Special Service Requests” option while booking to add a pet to your ticket. Same‑day airport walk‑ups are not guaranteed. More details on Delta’s full pet policy are available at Delta’s official pet travel page.

JetBlue

JetBlue’s JetPaws program gives pet owners a streamlined experience from Houston Hobby or IAH. Only small dogs and cats are permitted in the cabin, with a non‑refundable fee of $125 each way. The carrier must be 17″ L × 12.5″ W × 8.5″ H or smaller and fit under the seat. JetBlue caps the total number of pets per flight—typically four—so early booking is strongly advised.

One differentiator is that JetBlue awards 300 TrueBlue points per pet flight segment, a small perk that can add up for frequent travelers. The airline does not offer any checked‑pet or cargo service, meaning this option is exclusively for pets that can comfortably ride under the seat. Service animals follow separate federal guidelines and are not subject to these fees or carrier restrictions. For complete rules, visit JetBlue’s traveling with pets hub.

American Airlines

American Airlines serves both Bush and Hobby airports with a pet‑friendly cabin policy. Small dogs and cats at least eight weeks old can fly in approved carriers measuring no more than 19″ × 13″ × 9″ for soft‑sided bags, or 19″ × 13″ × 9″ for hard kennels if the flight has sufficient under‑seat clearance—on American Eagle flights, the hard‑sided limit drops to 16″ × 12″ × 8″. The combined weight of pet and carrier cannot exceed 20 pounds.

One‑way fees run $125 for domestic and select short‑haul international trips, and $200 for longer international segments. Unlike Delta, American will transport larger pets as checked baggage on many routes (excluding peak summer heat restrictions), and a full cargo program is available through American Airlines Cargo. However, snub‑nosed breeds are banned from checked and cargo transport due to respiratory risks. In‑cabin travel for these breeds is allowed when they meet size requirements. Always verify the list of restricted breeds before booking, as it changes seasonally.

Southwest Airlines

Southwest’s straightforward pet policy makes it a favorite for Houston travelers with small, well‑behaved animals. Pets must be cats or dogs, at least eight weeks old, and kept in a carrier that fits under the seat—maximum dimensions are 18.5″ × 8.5″ × 13.5″. The fee is $95 per pet carrier each way, one of the lowest among major U.S. carriers. Southwest allows only six pet carriers per flight, and reservations can be made by phone or at the ticket counter on the day of departure, though calling ahead is wise.

The airline does not accept pets as checked baggage or cargo, so this is a cabin‑only option. Pets must remain in the carrier on the aircraft and are not allowed in exit rows or on seats. Because Southwest has open seating, you’ll want to board as early as possible to ensure enough underseat space near your own seat. The absence of breed restrictions in the cabin is a significant plus for owners of breeds that some other airlines embargo.

United Airlines

United permits in‑cabin travel for cats, dogs, rabbits, and household birds on most flights within the U.S. and to select international destinations. Soft‑sided carriers must not exceed 18″ × 11″ × 11″, while hard‑sided kennels are capped at 17.5″ × 12″ × 7.5″. A one‑way Pet in Cabin fee of $125 is charged for domestic itineraries; for international flights the fee doubles to $250 and there may be an additional service charge when the pet is added at the airport.

United has invested heavily in its PetSafe cargo program for animals that are too large for the cabin, which operates from many airports out of Houston. The airline also maintains a strict health documentation policy—a veterinary health certificate issued within 30 days of travel is mandatory for all pets, with shorter windows for specific international destinations. Brachycephalic breeds face significant restrictions in both checked baggage and cargo, so in‑cabin travel is often the only option for these pets on United. Check the latest rules at United’s in‑cabin pet page.

Traveling with Larger Pets as Checked Baggage or Cargo

If your dog’s shoulders clear 12 inches or you have a large cat that can’t fit under a seat, in‑cabin travel becomes impossible. Several airlines provide checked‑baggage or cargo services for these animals, though availability depends on aircraft type, weather, and breed. Booking these options requires more advanced preparation and a thorough understanding of kennel requirements and temperature restrictions.

American Airlines and Delta Cargo are the two most frequently used cargo programs out of Houston. United’s PetSafe is another reliable choice. All three require a hard‑sided, IATA‑compliant kennel with metal nuts and bolts (no plastic snap‑together crates), adequate ventilation on all sides, and a leak‑proof floor. The kennel must allow the animal to stand, turn around, and lie down naturally without its ears touching the ceiling. Inside, attach a spill‑resistant water bowl to the door and include absorbent bedding—do not place leashes, toys, or collars that could snag.

Heat embargoes are a critical factor for Houston departures during summer months. When ground temperatures exceed 85°F, many airlines will not accept pets for checked or cargo travel because of the risk of heat stress during tarmac delays. Always consult the airline’s current weather restriction policy before confirming a booking. Costs for checked pets typically start around $200 each way within the U.S., while cargo pricing is quote‑based and depends on kennel size, weight, and routing. In both cases, you will need a health certificate issued within 10 days of travel, and sometimes a certificate of acclimation if temperatures drop below a certain threshold.

International Pet Travel Requirements

Flying with a pet from Houston to another country involves layers of regulation that go far beyond the airline’s own rules. The destination country—not the airline—sets the import requirements, and failing to meet them can result in quarantine or denial of entry. Begin researching at least three to six months before your travel date, as some vaccinations and tests require long lead times.

Core Documentation for Most Countries

Nearly every international destination requires a health certificate (often called a veterinary certificate or International Health Certificate) signed by a USDA‑accredited veterinarian within a short window before travel—often 10 days. The certificate confirms your pet is free from infectious disease and fit to fly. For many countries, the certificate must then be endorsed by APHIS, a process that can be done by mail or through a regional USDA endorsement office. The USDA APHIS Pet Travel website is the authoritative resource for these steps.

Rabies vaccination is mandatory for dogs, cats, and ferrets entering most countries. The vaccination must be current, and some nations require that it was administered at least 28 days—but not more than 12 months—prior to entry. A rabies titer test (FAVN) may be asked for by rabies‑free regions like Japan, Australia, the European Union when traveling from a high‑risk country, and some Caribbean islands. The blood draw must occur at least 30 days after the vaccination, and the waiting period after a satisfactory test result can be three months or longer.

Microchip and Identification Rules

The International Standards Organization (ISO) 15‑digit microchip is the global norm. Countries such as the United Kingdom, member states of the European Union, and the United Arab Emirates require the microchip to be implanted before the rabies vaccination, or the vaccine may be disregarded. Bring all microchip documentation to the vet visit so the number is recorded on every certificate.

Country‑Specific Nuances

Short‑haul trips to Mexico or Canada from Houston are generally less complicated, though still require proof of rabies vaccination and a health certificate. Travel to the United Kingdom avoids quarantine only if you follow the Pet Travel Scheme (PETS), which mandates tapeworm treatment for dogs within 24 to 120 hours before check‑in. Australia and New Zealand demand a government‑approved quarantine facility booking and microchip‑verified vaccination history months in advance. Research your exact destination using the USDA’s Pet Travel tool or the embassy website of the country you’ll enter.

Practical Tips for a Safe and Calm Journey

Preparation can transform a potentially stressful flight into a smooth experience for both you and your pet. Here are action‑oriented strategies that seasoned pet travelers swear by:

  • Acclimate to the carrier weeks ahead. Leave the carrier open at home with a favorite blanket and treats so your pet associates it with comfort, not confinement. Practice short car rides in the carrier before flight day.
  • Schedule a pre‑flight vet check. In addition to the required health certificate, ask your veterinarian about motion sickness or anxiety. Sedation is generally discouraged because it can affect breathing at altitude, but your vet can suggest safe alternatives like pheromone sprays or natural calming supplements.
  • Choose direct flights whenever possible. Each connection adds tarmac time, cargo transfer stress, and the potential for mishandling. A non‑stop out of IAH or HOU keeps environmental exposure to a minimum.
  • Timing meals and water. Feed your pet a light meal three to four hours before heading to the airport. Provide ice cubes in the carrier’s water dish instead of loose water to minimize spills, and attach an external pouch of dry food to the carrier if the journey exceeds four hours.
  • Label everything. Attach a sturdy travel tag to the carrier with your name, phone number, flight number, and destination address. Inside the carrier, tape a small bag with a recent photo of your pet and a copy of its health records—a lost pet is reunited faster when this information is immediately available.
  • Know the airport layout. Both Bush Intercontinental and Hobby have designated pet relief areas pre‑ and post‑security. Locate them on the airport map before you leave home so your pet can get a final bathroom break close to boarding time.

Frequently Asked Questions About Flying with Pets from Houston

Which airline has the cheapest pet fee?
Southwest charges $95 each way, the lowest standard fee among carriers regularly flying out of Houston, though JetBlue is close at $125.

Can I buy a seat for my large dog?
U.S. airlines do not allow owners to purchase an extra seat for a pet. Large dogs must travel as checked baggage or cargo. Private charter flights are the only exception where pets can share the cabin freely.

Are ESA (emotional support animals) still treated like service animals?
No. Since early 2021, U.S. airlines classify emotional support animals as regular pets, subject to the same carrier and fee rules. Only trained service dogs (and in some cases psychiatric service dogs) receive special accommodations under the Air Carrier Access Act.

What happens if my flight is diverted or delayed?
If you’re traveling with a pet in the cabin, you stay together. For pets in cargo or checked baggage, airlines have contingency plans to move animals to climate‑controlled holding areas during long delays. Always notify gate agents and customer service if your itinerary changes so they can monitor your pet’s location.

Do I need a pet passport?
The term “pet passport” usually refers to the collection of documents (health certificate, vaccination records, microchip certificate) assembled for international travel. The EU offers an official pet passport for residents, but U.S. travelers typically present the USDA‑endorsed health certificate instead.