“Air travel makes electrolyte packets necessary.”
Flying does not make electrolyte packets necessary.
You do not need a special packet for an ordinary flight. Water or another non-alcoholic drink you like does the job.
On your next flight, drink water or another non-alcoholic drink when you are thirsty. Leave the packet at home unless you have another reason to use one.
Safety note: Electrolyte packets add sodium. Too much sodium may raise blood pressure in some people and can cause a serious buildup of fluid in people with heart failure, liver cirrhosis or kidney disease.
Talk to a healthcare professional if: you have high blood pressure, heart failure, kidney disease or liver cirrhosis, or you have been told to limit salt or fluids, and you are thinking of using electrolyte packets while you travel.
Aviation health guidance agrees that dry cabin air causes only a small extra water loss and that ordinary drinks cover it, and no study shows that flyers need added electrolytes. The guidance and body science point the same way, but there are no trials of packets on flights, so confidence is moderate.
Flying does not make electrolyte packets necessary. Cabin air is dry, but an 8-hour flight adds only about 5 ounces of water loss, roughly a small cup, and ordinary non-alcoholic drinks replace it.
Air on a plane has about 20% humidity, compared with about 40 to 60% in an office. The UK aviation regulator says there is no risk of dehydration from this, and that drinking a lot of tea, coffee and alcohol can make dry eyes worse. A medical reference for doctors says any dehydration on flights can be avoided by drinking enough fluid and avoiding alcohol. Neither source says travelers need extra salt or minerals.
- UK Civil Aviation Authority. Passenger health FAQs: the aircraft cabin, your health and comfort. Summer 2026 consumer travel advice
- Sanford C. Air Travel. MSD Manual Professional Version. Full review September 2024, modified October 2025
- MedlinePlus, National Library of Medicine. Sodium in diet. Medical Encyclopedia. Review date April 30, 2026