My wife exhibits similar insecurities. Earlier this year I had a work related conference to attend in San Diego. Loved it there, the weather is incredible. This required me to fly cross country (coast to coast). She was so nervous that something might happen to me during the flight, that she wanted me to get an additional special life insurance policy that would cover some in-flight tragedy. She said that she remembered that there used to be "vending machines" at the airport for just that purpose. You simply inserted money for the policy of your choice and out pops your instant travel life insurance policy.
No, I did not get one, I already have life insurance. However I did call her on my cell at take-off's and landings, through my connecting flights. Just to let her know I was safely on the ground.
It does make me wonder though, if something were to happen, what are the chances of her or some fire/rescue person finding the receipt to that airport insurance transaction???
"And wrinkles only go where the smiles have been." J. Buffett