Depending on the airport it is good to have a letter stating that your pump should not be removed or put through the X-Ray machine. I have travelled a lot with a pump and two monitors.. One place (Amsterdam) I missed my connecting flight because I refused to dismantle... wait for it - my blood tester... I ended up testing my blood in front of them to prove it was not a hidden explosive device - There is a TSA card you can download for USA security it doesn't excuse you but it allows you to make them aware that you need special screening as opposed to electronic screening. Insulin was never a problem, but they don't like electronics. I rarely needed the letter but always had it just in case - also depending on where you are travelling... have a translation in the language of the country - don't just assume they speak English