Flying with a pet from Rialto, California, starts with a critical decision: choosing an airline that puts your animal’s safety and comfort first. The experience can be smooth and even enjoyable when you pick a carrier with clear, flexible policies, and it can turn into a nightmare when rules are confusing or handling is an afterthought. The good news is that several major airlines consistently rank high for pet travel, and they all operate out of the airport you’re most likely to use: Ontario International Airport (ONT), just a short drive from Rialto.

This guide breaks down the top three airlines for pet travel — Alaska Airlines, Delta Air Lines, and American Airlines — and explains exactly what to expect, from cabin rules to cargo options, fees, and paperwork. You’ll also find practical tips on preparing your pet, navigating the airport, and avoiding the most common travel day mistakes.

Why Airline Choice Matters for Pet Safety and Comfort

Not all airlines treat pets the same way. Some have dedicated pet programs with temperature-controlled cargo holds and staff trained specifically to handle animals, while others treat pets as an afterthought behind standard baggage. Your choice affects everything from whether your cat can sit under the seat beside you to the type of carrier you’ll need and the documents required at check-in.

Airlines that openly publish detailed pet policies usually have more experience managing live animals. They train ground crews to recognize stress signals, equip their cargo compartments with proper ventilation and temperature regulation, and often have a separate customer service team for pet-related questions. This transparency makes a huge difference when you’re 30,000 feet in the air and can’t personally check on your dog.

The region around Rialto benefits from Ontario International Airport’s strong network of domestic flights. All three of the best pet-friendly airlines — Alaska Airlines, Delta, and American — operate multiple daily departures from ONT, giving you flexibility to choose the schedule and routing that minimizes layovers and reduces overall travel time for your pet. Shorter total journey time directly correlates with lower stress for animals, so route options become part of the airline evaluation.

The Best Airlines for Pet Travel from Rialto

After comparing policies, safety records, customer feedback, and real-world experiences from pet owners, three carriers consistently stand out for travel originating near Rialto. Each one brings a slightly different strength to the table, so let’s look at exactly what they offer.

Alaska Airlines: A Top Pick for Flexibility and Few Breed Restrictions

Alaska Airlines earns its reputation as one of the most pet-friendly U.S. carriers. Dogs, cats, rabbits, and even household birds can travel in the cabin on most flights, with a flat fee of $100 each way. There are no blanket breed restrictions for in-cabin pets, which is a significant advantage for owners of snub-nosed breeds that other airlines often ban from cargo or even cabin travel.

The in-cabin rules are straightforward. Your pet must remain inside an airline-approved carrier that fits completely under the seat in front of you. Alaska allows both hard-sided and soft-sided carriers, with maximum dimensions of 17” x 11” x 9.5” for hard-sided and 17” x 11” x 9.5” for soft-sided (though soft-sided can be slightly taller if they can compress). The combined weight of pet and carrier cannot exceed 150 pounds for cargo, but in-cabin animals are limited to about 20 pounds total, as the carrier must fit under the seat. The carrier counts as your one carry-on bag, and you’ll still be allowed a personal item.

For larger dogs and cats that don’t qualify for cabin travel, Alaska offers a checked baggage pet option as well as a full-fledged cargo program through Alaska Air Cargo. Climate-controlled vehicles transport pets to and from aircraft, and the airline’s Pet Connect service allows you to track your animal’s journey. The cargo program requires a sturdy, IATA-compliant kennel, and you’ll need to book at least 24 hours in advance.

Alaska also provides a downloadable pet travel checklist on its website, which walks you through every step from booking to boarding. Their agents are specifically trained to handle pet reservations, so calling early — at least a week before departure — is the best way to secure a spot, as only a limited number of pets are allowed per flight. You can review the full policy and reserve your pet’s space directly on the Alaska Airlines pet travel page.

Delta Air Lines: Strong Cabin Policies and Advanced Cargo Comfort

Delta Air Lines is another reliable choice for Rialto pet owners. Small dogs, cats, and household birds are welcome in the cabin on most domestic flights. The one-way fee is $125, and the rules are similar to Alaska’s: the pet must stay in a carrier under the seat, and you can bring only one pet per person. The in-cabin carrier cannot exceed 18” x 14” x 8”. Like Alaska, Delta does not place breed-specific bans on cabin pets, but it does enforce size restrictions based on carrier dimensions, so measure your pet carefully — especially if you have a long-bodied breed like a dachshund.

Where Delta really shines for larger pets is its “Delta Cargo” program, which handles animals that can’t ride in the cabin. This is a separate booking from your passenger ticket and must be arranged well in advance. The cargo holds are fully pressurized and temperature-controlled, and Delta uses dedicated ground vehicles to transport pets between the terminal and the aircraft. Special handling requests, such as priority unloading, can be added during booking. For international travel or connections, Delta’s network often makes it a better choice than carriers with fewer hub options.

Health certificates are mandatory for all pets flying in cargo and strongly recommended for those in the cabin. Delta requires a certificate issued within 10 days of travel, and the document must include vaccination records, especially for rabies. The airline also asks that pets be at least 10 weeks old for domestic flights and older for some international routes. Check-in must be done at a full-service counter — you cannot use a kiosk or curbside service when flying with a pet.

Booking as early as possible is crucial because Delta limits the number of pets per cabin to a handful, and cargo space can fill up during busy seasons. The official Delta pet travel overview page lists all requirements and includes a tool to verify if your specific flight allows pets in the cabin or cargo.

American Airlines: Broad Route Coverage and Checked Pet Options

American Airlines rounds out the top three pet-friendly carriers for Rialto travelers. Small cats and dogs can fly in the cabin on most domestic and select international flights for a $125 fee each way. The carrier size limit is 19” x 13” x 9”, which gives a little extra room compared to some competitors. The pet must remain inside the carrier for the entire flight, and you can only combine the pet carrier with one personal item — no additional carry-on bag.

American also allows larger pets to travel as checked baggage on certain routes, provided the combined weight of the animal and kennel stays under 100 pounds and the animal is at least 8 weeks old. That checked baggage option can be more economical than cargo and simpler to coordinate, though it’s not available on all aircraft types, so confirm early. For pets that exceed checked baggage limits, American has a cargo program called “American Airlines Cargo,” which offers climate-controlled transport with real-time tracking.

One important nuance: American imposes breed restrictions for checked pets and cargo. Snub-nosed dogs and cats, such as bulldogs, pugs, boxers, Persian cats, and Himalayan cats, are not accepted in the cargo hold due to breathing difficulties at altitude. However, those breeds are still allowed in the cabin as long as the animal and carrier fit under the seat. If you own a flat-faced breed, American’s cabin policy becomes a critical factor, and you’ll want to carefully measure your pet and carrier before booking.

American’s website includes a scheduling tool that lets you check pet availability for your exact flight before you pay for a ticket. That feature alone can save hours of frustration. You can also review breed restrictions, carrier dimensions, and required health documents on the American Airlines pet travel page.

Key Factors to Consider When Choosing an Airline

Even among these three top carriers, the right choice depends on your pet’s size, breed, and temperament, as well as your destination. Understanding the differences between cabin, checked baggage, and cargo travel is essential before you book.

In-Cabin vs. Cargo vs. Checked Baggage

The least stressful option for most pets — and owners — is in-cabin travel. Your animal stays with you, you can monitor their condition, and they’re never out of your sight for long. The trade-off is strict size limits, meaning only small dogs and cats usually qualify.

Checked baggage is a middle ground where larger pets travel in a pressurized, temperature-controlled section of the cargo hold. You drop them off at check-in and pick them up at baggage claim, but you don’t have access during the flight. This option can work well for calm, well-socialized dogs that are comfortable in a crate. American’s checked pet service is one of the better-known examples.

True cargo travel, like Delta Cargo or Alaska Air Cargo, is designed for animals that need specialized handling, larger kennels, or are traveling on separate flights from their owners. The booking process is separate, and you’ll need to get your pet to a cargo facility hours before departure. While cargo programs offer the most robust climate control and handling, they also involve more logistics and a higher degree of separation during travel.

Breed and Size Restrictions

Every airline publishes a list of breeds that are either banned or restricted in certain travel modes. Flat-faced (brachycephalic) breeds are especially vulnerable to breathing problems, heat stress, and pressure changes, so they are almost universally prohibited from cargo compartments. If you own a pug, English or French bulldog, Shih Tzu, or Persian cat, you’ll need to plan for in-cabin travel only. This makes Alaska’s and Delta’s lack of cabin breed bans particularly valuable.

Large giant breeds, such as Great Danes or Mastiffs, often exceed the weight and kennel size limits for both checked baggage and cargo on many narrow-body aircraft. If you need to transport a very large dog, you’ll have to verify aircraft type and kennel size restrictions with the cargo department directly. Booking early is even more important in these cases, because only certain flights have the hold capacity to accommodate oversized kennels.

Health Certificates and Documentation

A valid health certificate issued by a licensed veterinarian is the single most important document you’ll need. Most airlines require that the exam take place within 10 days of travel, and failing to present this paper at check-in can result in your pet being denied boarding. The certificate must confirm that your animal is free of infectious disease, is not a nuisance to other passengers, and is physically fit for the flight.

In addition to the health certificate, you’ll need proof of rabies vaccination if your pet is over a certain age — typically 12 weeks — and sometimes proof of other core vaccines. If you’re flying to Hawaii or an international destination, the requirements escalate dramatically. Hawaii, for instance, has a quarantine program that requires microchipping, multiple blood tests, and months of preparation. For those trips, you’ll need to involve the airline’s cargo department and possibly a pet relocation specialist. The USDA’s Animal and Plant Health Inspection Service provides an excellent starting point for understanding state and international rules.

How to Prepare Your Pet for Air Travel

Even the best airline can’t compensate for an unprepared pet. Preparation begins weeks before your flight and focuses on two areas: health and carrier acclimation.

Veterinary Check and Preventative Steps

Schedule a pre-travel vet visit at least three to four weeks before your departure. Use this appointment not only to obtain the health certificate (timed within the airline’s window) but also to discuss any anxiety, motion sickness, or existing health conditions. Your vet may recommend microchipping if your pet isn’t already chipped, and you should confirm that the microchip registration links to your current phone number and email — not an outdated address.

Update all ID tags on the collar and consider attaching a travel tag that lists your flight number, destination, and a backup contact. In the unlikely event your pet escapes the carrier during transit, multiple forms of identification drastically increase the chance of a quick reunion.

Carrier Training and Comfort

Start introducing the travel carrier at home at least two weeks in advance. Leave it open in a common area with a soft blanket or a toy inside, and let your pet explore on their own. Then gradually feed meals inside the carrier and practice closing the door for short periods. The goal is for your pet to associate the carrier with safety and comfort, not confinement.

Make sure the carrier itself meets all airline requirements. Soft-sided carriers are usually the best choice for in-cabin travel because they’re easier to squeeze under seats, but they must have secure zippers and mesh ventilation on at least three sides. For cargo travel, only hard-sided IATA-approved kennels with metal bolts, not plastic snap closures, are acceptable. A kennel that the pet can stand upright in, turn around, and lie down comfortably is non-negotiable.

Food, Water, and Exercise Before the Flight

Feed your pet a light meal about four hours before departure. Avoid feeding right before the flight to reduce the risk of nausea and upset stomach. Water should be available until the last possible moment, but limit intake just before boarding to prevent accidents. Pack a collapsible bowl and a small water bottle in your carry-on for after the flight.

If you have an active dog, give them a long walk or a vigorous play session the morning of the trip. A tired dog is much more likely to settle and sleep through the flight. Ontario Airport has designated pet relief areas both before and after security, so you can plan one last break before heading to the gate.

Airport Day: Check-In, Security, and Boarding

On the day of travel, arrive at Ontario International Airport at least two hours early for a domestic flight — more if you’re dealing with a cargo drop-off or an international route. Pet check-in is always done at a full-service counter, and the process can take longer than a standard baggage check because agents need to verify the carrier, review paperwork, and sometimes place a special tag on the crate.

When going through security, you’ll be asked to remove your pet from the carrier. The carrier itself goes through the X-ray machine while you carry your pet through the metal detector. It’s a good idea to use a harness rather than just a collar, to prevent any escape during this process. Once you’re through security, find the pet relief area, give your animal a final chance to stretch, and then settle them back in the carrier.

At the gate, let the airline staff know you’re traveling with a pet. Occasionally they’ll want to verify the carrier one more time or give you a boarding reminder. If you’re flying with a pet in the cabin, you’ll typically board early, which helps get your pet positioned before the aisle fills up.

Cost Breakdown and Booking Strategies

Pet travel fees add to the overall ticket cost, so plan for them from the start. As of now, Alaska charges $100 each way for cabin pets, while Delta and American charge $125. Cargo costs vary based on weight, kennel size, and distance, but they usually start around $200 and can go well above $500 for a large kennel. Checked baggage pet fees are generally comparable to cabin fees, but again, availability is limited.

To avoid surprises, never book a nonrefundable human ticket without first confirming pet space on that specific flight. Call the airline’s pet desk directly and have the flight number, date, and your pet’s kennel dimensions ready. Bilingual phone lines and chat services can reduce hold time, and for Delta Cargo and Alaska Air Cargo, you can often initiate the booking online.

If you’re flexible with travel dates, consider flying midweek or during off-peak hours, when flights are less crowded and the cabin environment is quieter. Red-eye flights can sometimes work for pets who sleep easily, but they may be stressful for pets who need regular bathroom breaks.

Summary and Final Checklist

Choosing the right airline from Rialto is a decision you control, and it directly influences your pet’s travel experience. Alaska Airlines, Delta Air Lines, and American Airlines all offer strong in-cabin policies, clear rules, and responsible cargo programs. The key is matching your pet’s size, breed, and personality to the specific policies of each carrier.

Before you book, run through this simple checklist:

  • Confirm Ontario Airport (ONT) serves your chosen airline and route.
  • Measure your pet’s height, length, and weight and compare them to the airline’s carrier specifications.
  • Check breed restrictions for both in-cabin and cargo travel.
  • Call the airline to reserve pet space before purchasing your own ticket.
  • Schedule a vet visit for the health certificate, vaccinations, and microchip update.
  • Begin carrier acclimation training at least two weeks ahead.
  • Pack a go-bag with leash, collapsible bowls, waste bags, a small blanket, and a copy of all documents.

With the right preparation, flying with your pet from Rialto can be a straightforward, low-stress event. By sticking with carriers that treat pet travel as a priority rather than an inconvenience, you give your animal the best possible chance at a safe, comfortable journey.