For some, service dogs can be the difference between being homebound and having the ability to travel freely.

According to the U.S. Department of Transportation (DOT), a service animal is a dog that has been specifically trained to perform a task for a person with a disability. Those who have service dogs are entitled to fly with them at no additional cost, but there are a few hoops you’ll need to jump through.

Let’s take a look at how to fly United Airlines with a service dog, including the paperwork you’ll need and how to book your flights.

United Airlines service dog policy

Does United Airlines allow service dogs? In short: Yes. It is federal law that airlines must allow travelers to bring their service dogs with them when flying.

There are some exceptions to this. If the service dog cannot fit within the assigned space, passengers may need to have them fly cargo free of charge. They can also be moved to another flight with more room or be given a seat with more space.

There are also situations when airlines, including United, can deny transport of a service animal, like:

When the dog poses a direct threat to health or safety.

If the dog is disruptive.

If carrying the dog would violate law.

If the passenger does not provide DOT forms as required.

Aside from these situations, passengers are always allowed to bring their service dogs on flights.

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Booking a flight with a service dog

Booking a United flight with a service dog isn’t as difficult as it used to be.

Booking a new flight

If you haven’t booked your flight yet, you’ll simply go through the standard booking process. This includes searching for your flight and selecting an option that works for you.

During the checkout process, you’ll be taken to the Traveler Info page. It’s here that you’ll want to scroll down to the special needs section. Expanding the section reveals a variety of options, including the ability to add a service dog to your reservation by check marking the "Task-trained service dog" option.

Adding a request for a service dog doesn’t immediately guarantee its approval, however. You’ll still need to complete the required paperwork, which we’ll go over below.

For flights that are already booked

If you’ve already booked your flight and need to add a service dog, you can do so under "Manage Trip" in your United MileagePlus account or by using your booking information to search for your trip on United’s website.

Once you’ve found your flight, scroll down to see the "Special accommodations" section. Expanding this section will allow you to add your service dog to your reservation.