Anyone who calls herbs hazardous is totally misinformed. Every year the American Association of Poison Control Centers (AAPCC) compiles statistics on accidental deaths from drugs, herbs, vitamins, and other supplements. The AAPCC’s most recent report (2008) records 1,756 accidental poisoning deaths. How many were attributable to medicinal herbs? Zero. In every accidental death caused by a pharmacological agent, the culprit was a pharmaceutical. And it’s been that way for many years. Herbs are safer than drugs.
Reviews | “I love the simplicity of introducing herbs through food and cooking. Food should always be our first medicine…I like that [the recipes] are all very doable: no specialized equipment, no huge orders of exotic herbs and spices and no tricky culinary skills required. The author has done a remarkable job of making herbal support both legitimate to the doubtful and accessible to the open-minded.” – Sue Kusch, Amazon Review

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.
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. 
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