Under the JetBlue Pet Policy, passengers can bring small cats or dogs in the aircraft cabin. Pets must fit comfortably in an airline-approved carrier that can be stored under the seat. The policy requires pets to remain in carriers during the journey. Reservations for pets should be made in advance due to limited availability. A Pet Fee applies per flight segment. JetBlue outlines carrier size, health requirements, and travel tips to ensure pets enjoy a safe, stress-free flight experience.