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I have found over the years Delta Airlines to be the worst GF meal provider.
On continental U. S. flights this isn't a big deal as generally we can
survive, but on a long international flight, it can be miserable.  On any
airline, I expect the worst and take rice cakes and peanut butter or string
cheese and order the fruit plate.  Saves wear and tear on my stress level!

Vicki
WA state