There's no point adding stress to your already stressed-out upper respiratory system, and that's what the change in air pressure will do. Flying with cold or flu congestion can temporarily damage your eardrums as a result of pressure changes during takeoff and landing. If you must fly, use a decongestant and carry a nasal spray with you to use just before takeoff and landing. Chewing gum and swallowing frequently can also help relieve pressure.
Getting started with home remedies, natural treatments and alternative medicine is simple enough… in fact, you'll probably find everything you need right here, in your kitchen. Just scout around, add a little bit of this, a dash of that, and you're good to go! A healing mixture of honey & ginger juice can cure a cough, while a few dry figs soaked overnight can cure constipation. It isn't rocket science and it does not require a deep understanding of human anatomy!
You put a salt and warm water mixture in something that looks like a little teapot. Then pour it through one nostril and let it drain out the other. You have to practice a little, but once you get the hang of it, it can ease allergy or cold symptoms and may even help you get rid of a cold quicker. Just make sure you use distilled or cooled boiled water and keep your neti pot clean.