Airline Policies for Small Dogs in 2025
Most major U.S. airlines allow small dogs in the cabin if they fit in an approved carrier under the seat. United, Delta, American, and Southwest publish current pet policies with fees and carrier dimensions. Fees typically range from $95 to $125 each way for domestic flights, and some airlines limit the number of pets per flight. Always check the airline’s latest pet policy page before booking, as rules can change seasonally. For details, see United Airlines Pet Travel guidelines at https://www.united.com.
Delta Air Lines requires pets to remain in the carrier under the seat for the entire flight and limits the number of pets per cabin based on the aircraft type. American Airlines also enforces carrier size limits and charges a pet fee that varies by route. Southwest Airlines allows pets in the cabin with a fee per pet, and reservations are accepted on a first-come basis. These policies apply to dogs that meet the airline’s size and carrier requirements, and service and emotional support animals may have separate rules. Review the current Delta pet policy at https://www.delta.com.
Size, Carrier, and Documentation Requirements
Maximum Size and Carrier Dimensions
Airlines generally require the carrier to fit completely under the seat in front of you, with maximum dimensions often around 18 x 11 x 11 inches, though exact limits vary by airline. The dog must be able to stand, turn around, and lie down naturally inside the carrier. Soft-sided carriers are typically required for cabin travel, and hard-sided carriers are usually permitted only in cargo holds. Airlines may weigh the dog plus carrier and enforce a combined limit, commonly around 20 pounds, for cabin acceptance.
Required Documents and Health Standards
Most airlines require a current health certificate issued by a licensed veterinarian within 10 days of travel, and some destinations require additional vaccinations or import permits. The U.S. Department of Agriculture (USDA) provides guidance on international pet travel and country-specific entry requirements. For international flights, check the destination country’s embassy or agriculture department website for quarantine and documentation rules. See the USDA Animal and Plant Health Inspection Service pet travel page at https://www.aphis.usda.gov.
Costs, Alternatives, and Safety Considerations
Fees and In-Cabin vs. Cargo Options
In-cabin pet fees for small dogs typically range from $95 to $125 each way on domestic U.S. flights, while cargo transport can cost several hundred dollars or more depending on the route and carrier. Some airlines restrict certain breeds or snub-nosed dogs from cargo travel due to safety concerns. If your dog does not meet cabin requirements, you can explore cargo programs that meet IATA Live Animals Regulations and use climate-controlled holds. Compare in-cabin and cargo options on the American Airlines pets page at https://www.aa.com.
Safety Tips and Airline Rankings
The U.S. Department of Transportation publishes annual reports on companion animal incidents during air travel, which can help you compare airline safety records. Choose direct flights when possible, avoid extreme temperatures, and ensure the carrier is clearly labeled with your contact information. Use a leak-proof, well-ventilated carrier and attach a current photo of your dog to the outside. For incident data and airline rankings, see the DOT Companion Animal Air Travel report at https://www.transportation.gov.