Spirit Airlines Pet Policy 2026: In-Cabin Fees, ESA Rules, and Service Animals

Spirit Airlines and Emotional Support Animals: What Changed in 2021

If you are searching for Spirit Airlines' ESA policy because you have an ESA letter and want to fly with your animal in the cabin, the answer is clear: Spirit no longer allows ESAs as a cabin accommodation. This changed in January 2021 following the U.S. Department of Transportation's revised Air Carrier Access Act rules.

Prior to the DOT's 2021 rule change, the Air Carrier Access Act required airlines to allow emotional support animals in the cabin at no charge, based on documentation from a mental health professional. The 2021 rule gave airlines the choice to stop recognizing ESAs as a separate category. Spirit, along with Delta, American, United, Southwest, and most other major U.S. carriers, eliminated ESA cabin access.

Today, there are two categories of animals on Spirit flights: in-cabin pets (with a fee and size limits) and trained service animals (free, with documentation). ESAs that do not meet the service animal definition fall into the pet category.

Spirit's In-Cabin Pet Policy

Spirit allows small pets in the cabin on most domestic routes. Key requirements:

• Your pet must fit in an approved soft-sided carrier that fits under the seat in front of you
• The carrier must meet Spirit's size and weight requirements (check Spirit's website for current limits)
• You must pay a pet fee per segment — the fee amount is set by Spirit and subject to change
• Pets must stay in their carrier for the entire flight
• Spirit limits the number of pets per flight — book your pet as early as possible if you plan to travel with them

Most dogs that fit in an under-seat carrier (typically small breeds weighing under 20 pounds with the carrier) can travel this way. Larger dogs cannot travel in the cabin as regular pets — they must go as checked baggage, and Spirit's availability for checked animals varies by route. Verify current options directly with Spirit before booking.

Service Animal Policy: What Spirit Allows

Trained service dogs — including psychiatric service dogs (PSDs) — retain in-cabin access on Spirit under the DOT's 2021 rules. Spirit requires:

• Advance notice (typically 48+ hours before the flight) if you are traveling with a service animal
• Completion of the DOT Service Animal Air Transportation Form, which you submit to Spirit before your flight
• Behavior standard: the service animal must be housebroken and under the handler's control at all times

Spirit does not charge a fee for trained service animals. Service animals are not subject to the pet carrier and size restrictions that apply to in-cabin pets.

Psychiatric Service Dogs (PSDs) on Spirit

A psychiatric service dog is a dog individually trained to perform specific tasks that mitigate a psychiatric or mental health disability — for example, interrupting a panic attack, performing deep pressure therapy during PTSD flashbacks, or alerting to anxiety onset before it escalates. PSDs qualify as service animals under both the ADA and DOT rules.

To fly with a PSD on Spirit:

1. Contact Spirit's accessibility services team in advance to notify them of your service animal
2. Complete and submit the DOT Service Animal Air Transportation Form (available on the DOT website and Spirit's accessibility page)
3. Be prepared to answer the two ADA-standard questions: (1) Is this a service animal required because of a disability? (2) What work or task has the dog been trained to perform?

A PSD letter from a licensed mental health professional demonstrates your disability and the therapeutic relationship but does not replace the DOT form. Both documents may be useful. See our complete guide to flying with a psychiatric service dog.

If Your Dog Is Too Large for In-Cabin Travel

If your dog is too large to travel in an under-seat carrier and does not qualify as a trained service animal, your options on Spirit are limited. Spirit's ability to transport larger animals as checked baggage varies by route, aircraft, and season. Some routes and aircraft types do not accept checked animals at all. Contact Spirit directly to understand the options available for your specific itinerary.

If air travel with a large dog is a recurring need and your dog provides specific psychiatric disability-related task work, training your dog as a PSD — and obtaining a PSD letter from a licensed mental health professional — is worth exploring. See our guide on how to owner-train a psychiatric service dog.

ESA Housing Rights Remain Unaffected by Airline Policy Changes

While the 2021 DOT rule eliminated airline ESA access, ESA housing rights under the Fair Housing Act are completely separate and were not changed by the airline rule. Your ESA letter still gives you the right to request a reasonable housing accommodation — living with your animal in no-pet housing, bypassing breed and size restrictions, avoiding pet deposits. The FHA's protections are intact.

If you need an ESA letter for housing purposes — which is where ESA documentation still carries full legal weight — see our guides on ESA letters for housing and flying with an ESA in 2026.