You are sweet wife !!! Your Husband is lucky to get.
You know, In all over world the most scientifically handle area is aeronotics.because there is no place fo mistake.Today , After every flight lands on the airport, it has to go for full check up and has to get certified that NOC(No Objection Certificate)
then only it can take another flight. Other then this if you see stat... for Plane crash then you will come to know that This aero plan crash is very rare and happens 1 or Max 2 in a yr or two yr.
Hijacjing is different thing so please dont mix it.
Now never feel upset.
One small Story For You! One day a there were some celebrity who were traveling in a plan.And there was also some renound politician.In whcih one famous actor(Saif Ali Khan) was also traveling and And he has the same problem as you have. He was nervous. One of the person sitting near by him got that and asked him-Y r u afraid ? then he expressed his fear in hidden words" that is PLANE CRASH"
Other guy explain" Dont worry there are alot of people who are enormously famous travelling in this flight and God will never want to give a sudden death to each and every.
The moral of story is that " You always Travel with you luck and trust your luck."
Another thing i want to mention.
Dream is nothing but Result of your Fear , Worries , tension and happiness. See you were knowing that your husband is leaving for some twon by Flight next day and your unconsicous mind was alraming you always.And once you went to sleep then it came as plan crash "YOUR DREAM"
Live happy life.We can't win over luck and just trust your luck.it will never cheat you.