I flew from the east coast to the west coast, round trip and had a letter from my doctors to explain the Jevity, syringes, etc. There was a little hassle in some airports, but not much. We stayed on the west coast for a week so I packed enough cases of Jevity in my checked suitcases to last that long based on 6 cans a day. I only took 6 cans in my carry on bag to make sure I'd have enough feedings to allow for cancellations, layovers, etc. I look back now and can't believe I even made the trip because it WAS a trip! LOL!