My condolences. In supporting my friend and his travel plans, it was about TSA AND NOT Delta. He followed the posted TSA policy but also picked a time during a lull at security. He watched the TSA agents for seversl minutes finding the ones he thought were acting with compassion that day. And approached with humility and simply said "can you help me and my father get home?" Explained and let the process play through. It worked fine and he then packed them in his roller bag in the overhead and all was well.

He did not want them out of his eyesight by checking them. Ask about the pros of a woodern or metal urn vs hardboard urn for transport. He heard that TSA has an easier time with a hard cardboard box sides.

This from the TSA...
Traveling with Crematory Remains

The subject of traveling with crematory remains has been in the news recently. As part of our standard operating procedures, TSA has a clear process for screening crematory remains. Our Officers routinely conduct these types of screenings throughout our nation’s airports.

Passengers may transport crematory remains as part of their carry-on property or checked baggage. Some airlines do not allow crematory remains as checked baggage, so check with your airline first.

If carrying on the crematory remains, they are subject to screening and must pass through the X-ray machine. If the X-ray Operator cannot clear the remains, TSA may apply other, non-intrusive means of resolving the alarm. Under no circumstances will an officer open the container, even if the passenger requests this be done. If the officer cannot determine that the container does not contain a prohibited item, the remains will not be permitted.

We understand the emotional stress passengers may be under when transporting the remains of a loved one. Our guidelines for traveling with crematory remains is not intended to make this already emotionally difficult process more complex than needed. However, crematory remains are one of the many sensitive items that could be exploited by someone wanting to conceal a dangerous item.

If you have questions, concerns or would like to provide feedback, please feel free to contact the TSA Contact Center, 1-866-289-9673 or use the Talk to TSA feature on our website.