The solar flares can take down systems but only a few issolated problems should occure. You get a whole days warning for the flare to get near the earth. Also aircraft get a very good view of 10-12 satelites unlike some ground positions. The noise will be for more of a problem for a TOM_TOM than an airbourne receiver.
A far bigger risk is a super volcano they keep talking about. One of those could ground all jets and stop wine production for years, espically if yellosstone blows.
