What to do before you fly
This is an example of a mail about travelling in USA:
Make sure to bring more supplies than you think you need – at least 50% more, maybe even double the amount of pouches etc. you would use for the same time period at home, just in case you have stomach problems or if you are stuck somewhere without access to supplies. Divide your supplies in different bags, in case your luggage is lost or the flight is delayed. Bring as much as you can in your hand luggage, but cut all your barriers to the right size before you fly (at least those you will be carrying in your hand luggage), since you will not always be allowed to bring scissors in your hand luggage.
At the airport: Know your rights!
Will you have trouble at the security check? The security scanner might detect your pouch, even if it's empty. But you do not have to show your pouch, and security should not ask you to remove clothing to expose it or let them touch it. You may be asked (or you can volunteer) to rub your hand against the pouch on the outside of your clothes (to rule out explosives), but that should be the extent of the examination. Download and print a "flash card" from UOAA to communicate your condition discreetly to the Transportation Security officer. Try and arrive early at the gate, so you can change your pouch just before boarding.
In the air
Some people are concerned that the pouch could expand during the flight due to the change in cabin pressure. There is a slight risk that the pressure will cause the pouch to balloon. If this should happen all you need to do is go into the bathroom and empty your pouch. And remember that just as often ballooning is caused by something you ate or drank – so when you're flying be extra careful with carbonated drinks. Booking a seat in the back row near the bathrooms might help take away some of your concerns and make you feel more confident as well. If you are a little self-conscious about noise from the pouch, I think you will be pleasantly surprised by how noisy an airplane cabin is. Maybe you didn't notice it before, but it is very unlikely that your pouch can make noises loud enough to be heard in the cabin. There's no need to tell the cabin personnel about your ostomy in advance, and most likely they'll never notice.
I hope you will find that flying with your ostomy was much easier than you expected.