Yes, Southwest Airlines provides seatbelt extenders upon request on all flights. These extenders add approximately 25 inches to the standard belt length. However, in early 2026, Southwest updated its "Customer of Size" policy. If you require a seatbelt extender and cannot lower both armrests comfortably, you are now required to purchase a second seat at the time of booking. While the airline previously offered a more generous refund policy for these extra seats, refunds are now typically only granted if the flight is not full. Passengers are also prohibited from bringing their own personal seatbelt extenders for safety and regulatory reasons; you must use the FAA-approved equipment provided by the flight crew.