Hi @annab_0709, I would recommend that at the least, you suspend pump operations when taking off and landing. I’ve flown many times without turning off or disconnecting my pump and on a few occasions have had to treat a severe low while in the air; my pumps have all used tubing.
On my last four air flights I suspended my pump and physically disconnected and my BG levels stayed steady - it may have been just coincidence. If you van suspend and/or disconnect readily I’d recommend doing that; the old “ounce of prevention” thing.
I traveled with all my supplies in my carry-on, including three 6 oz. juice boxes, all permitted by rule for a person with T1D - the key words for TSA, “medical necessity”. before traveling, visit web sites, diabetes.org [American Diabetes Association] and print out the travel rehs and pack that page with your supplies. Specifically, print "exception 3-1-1.