Comprehensive Guide to Domestic US Airline Fees and Requirements for Traveling with Pets in 2026

Traveling with pets has become increasingly common, but understanding airline fees and requirements can be confusing. Each airline has its own rules, fees, and restrictions that pet owners must follow to ensure a smooth journey for their furry companions. This guide breaks down the current pet travel fees and policies for major US domestic airlines in 2026, helping you plan your trip with confidence. Alaska Airlines stands out as the top choice for pet travelers, but we also cover American, Delta, United, Frontier, and Allegiant Airlines.

Alaska Airlines Pet Travel Fees and Guidelines

Alaska Airlines is widely recognized for its pet-friendly policies and affordable fees. It allows pets to travel in the cabin or as checked baggage, depending on the size and destination.

• In-cabin pets: $100 each way

• Checked pets: $150 each way (available on select flights)

• Pet types allowed: Dogs, cats, household birds, and rabbits

• Carrier requirements: Must fit under the seat, with maximum dimensions of 17" x 11" x 9.5"

• Pet reservations: Required in advance due to limited space. Call 1-800-252-7522 to request a spot as soon as travel plans finalized

  
  

Alaska Airlines also offers a dedicated pet travel page with detailed guidelines and tips for a comfortable trip: Alaska Airlines Pet Policy

American Airlines Pet Travel Fees and Guidelines

American Airlines charges a flat fee for pets traveling in the cabin, aligning with many other major carriers.

• In-cabin pets: $150 each way

• Checked pets: Not accepted (pets must travel in the cabin or cargo on international flights)

• Pet types allowed: Dogs and cats only

• Carrier requirements: Must fit under the seat, with maximum dimensions of 19" x 13" x 9"

• Pet reservations: Required and limited to 7 pets per flight

  
  

For more details, visit American Airlines’ official pet travel page: American Airlines Pet Policy

Delta Air Lines Pet Travel Fees and Guidelines

Delta Air Lines maintains a consistent fee structure for pets traveling in the cabin and cargo.

• In-cabin pets: $150 each way

• Checked pets (cargo): Fees vary by destination and size, starting around $200

• Pet types allowed: Dogs, cats, and household birds

• Carrier requirements: Must fit under the seat, with maximum dimensions of 18" x 11" x 11"

• Pet reservations: Required, with a maximum of 2 pets per passenger

  
  

Delta’s pet travel information is available here: Delta Pet Policy

United Airlines Pet Travel Fees and Guidelines

United Airlines charges fees similar to American and Delta for in-cabin pets, with additional options for cargo travel.

• In-cabin pets: $150 each way

• Checked pets (cargo): Fees vary based on size and route, typically starting at $200

• Pet types allowed: Dogs, cats, and household birds

• Carrier requirements: Must fit under the seat, with maximum dimensions of 18" x 11" x 11"

• Pet reservations: Required, limited to 2 pets per passenger

  
  

United’s pet travel rules and fees are detailed here: United Airlines Pet Policy

Frontier Airlines Pet Travel Fees and Guidelines

Frontier Airlines offers one of the most affordable pet travel options, but with strict size and weight limits.

• In-cabin pets: $99 each way

• Checked pets: Not accepted

• Pet types allowed: Dogs, cats, rabbits, guinea pigs, hamsters and other small animals

• Carrier requirements: Must fit under the seat, with maximum dimensions of 18" x 14" x 9"

• Weight limit: Combined pet and carrier weight must not exceed 20 pounds

• Pet reservations: Required, limited to 2 pets per flight

  
  

More information can be found on Frontier’s pet travel page: Frontier Airlines Pet Policy

Allegiant Air Pet Travel Fees and Guidelines

Allegiant Air allows small pets to travel in the cabin but does not accept pets as checked baggage or cargo.

• In-cabin pets: $50 per segment, per carrier. Non-refundable

• Checked pets: Not accepted

• Pet types allowed: Domestic dogs and cats only

• Carrier requirements: Must fit under the seat, with maximum dimensions of 8" x 14" x 18"

  
  

For the latest details, visit Allegiant’s pet travel page: Allegiant Air Pet Policy

Tips for Booking and Traveling with Pets

• Book early: Airlines limit the number of pets per flight, so reserve your pet’s spot as soon as possible.

• Check carrier size: Make sure your pet’s carrier meets the airline’s size requirements to avoid surprises at the airport.

• Prepare documents: Some airlines require health certificates or vaccination records, especially for checked pets.

• Arrive early: Give yourself extra time at the airport to check in and handle any pet-related procedures.

• Stay informed: Airline policies change often, so always check the airline’s official website before booking.

  
  

Traveling with pets requires careful planning, but knowing the fees and rules upfront makes the process easier. Alaska Airlines offers the best balance of affordability and pet-friendly policies, making it a top choice for pet owners. American, Delta, and United provide consistent fees and options, while Frontier and Allegiant offer budget-friendly in-cabin travel for smaller pets.

Use the links provided to review each airline’s full pet travel policies and prepare for a smooth trip with your pet in 2026. Safe travels!

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