I haven't read the entire thread, so this may have already been mentioned -
For those of you who have to have peanut butter on a flight, have you considered almond butter or Nutella as a potential replacement? There are alternatives to peanut butter.
I realize there are some who have allergies to tree nuts as well as peanuts, but, as far as I know, peanut allergies are more common & potentially more life threatening.
I also understand that there's simply no way to guarantee a flight is peanut free - especially peanut dust free. And, like others have said, many products contain peanuts or have possible cross contamination. There's simply no way to ensure a 100% peanut free environment - anywhere.
However, I seriously cannot imagine willfully eating anything w/ peanut butter or giving my child anything w/ peanut butter if I know there is someone on the plane w/ a life threatening allergy to peanuts.
If I ate a peanut butter sandwich or gave my child some peanut butter crackers & someone DIED because of the peanuts I ate, I can't even imagine how I would feel - just absolutely awful & so guilty!
It's one thing to eat peanut butter or peanuts not knowing there's someone nearby w/ a peanut allergy, but knowing & then going ahead & eating peanuts anyway... I just couldn't do it.
If I were on the plane & had to have something to control my blood sugar or give something w/ protein to my child & the ONLY thing I had was peanuts or peanut butter, I think I'd probably ask a flight attendant for assistance, explain our medical issues, & then ask - "Is there a place we can go where we can eat this away from the person w/ allergies?" "Do you have anything we can eat in place of our peanut butter?"
I'm not just going to sit back in my seat & eat my peanut butter realizing that my doing so could cause the death of someone else.
Peanut allergies do not trump other disabilities, but I think potentially dying IS worse than storming or having a tantrum because you can't have peanut butter.
And, all this aside, I really feel for those of you that have children w/ life threatening peanut allergies. I would be in a constant state of hyper-vigilant anxiety. I could not put my child on a plane - the risks would just be too great for me. We would drive.
And I realize other opinions may vary.