Cremated remains on JetBlue flights
Cremated remains
Cremated human remains must be transported in a crematory container (urn) and will only be accepted as a carry-on.  Urns are considered a Special Item and will not count as part of the customer's personal item or carry-on item limitation. The urn must fit completely stowed under the seat in front of the customer or in an overhead bin. The urn may not be held by a customer for taxi, takeoff, and landing.
In order to travel with cremated remains, customers must provide the following documentation to a JetBlue airports crewmember at check-in:
  • A certified copy of the death certificate; and,
  • An original/certified document or letter from the funeral director or crematorium that performed the cremation
Upon entry through the TSA security checkpoint, the urn will be sent through the screening device.  If the urn cannot be cleared by the TSA, it will not be permitted onboard the aircraft.  The TSA cannot state for certain whether particular urns can be successfully screened; however, the TSA recommends that you purchase a temporary or permanent urn made of a lighter weight material, such as cardboard, wood, or plastic for travel. 
Customers traveling to international destinations are solely responsible for obtaining all necessary documentation and otherwise complying with the laws of the destination country regarding the entry and clearance of cremated remains prior to travel.    
Pet Remains
JetBlue does not accept pet remains, cremated or otherwise, in the cabin of the aircraft or as cargo.