Travel Hydration Hub
Flight Hydration
Flight hydration is the practice of maintaining healthy fluid and electrolyte balance before, during and after air travel, where cabin humidity below 20% accelerates fluid loss.
Why Flight Hydration Matters
Cabin air is dry by design
Pressurised aircraft cabins typically sit below 20% relative humidity — drier than most deserts. Your body loses water with every breath, faster than at ground level.
Dehydration compounds travel fatigue
Even mild dehydration contributes to headaches, dry skin, sluggish digestion and that "drained" feeling on arrival. Good hydration is the single easiest factor a traveller can control.
Alcohol and caffeine accelerate fluid loss
Both are diuretics, and the dry cabin amplifies their effect. Frequent flyers moderate both in the air.
How Flight Hydration Works in Practice
- 1
Pre-hydrate
Start your trip well-hydrated rather than playing catch-up at altitude. Aim for normal daily intake in the 24 hours before departure.
- 2
Around 250 ml per flight hour
A widely used aviation health guideline: roughly a glass of water per hour in the air.
- 3
Add electrolytes
Sodium, potassium and magnesium help your body retain and use water effectively. A low-sugar electrolyte stick (like TRAVELYTES™ FLIGHT) is the format frequent flyers prefer.
- 4
Limit alcohol and caffeine
One drink in the air ≈ two on the ground in terms of dehydration.
- 5
Keep hydrating after landing
Cabin dehydration does not vanish the moment you step off the plane. Continue for 24-48 hours.
Who Flight Hydration Is For
- •Long-haul and short-haul passengers alike
- •Frequent business travellers
- •Cabin crew and pilots
- •Travellers prone to flight tiredness, headaches or dry skin in the air
- •Anyone flying with infants or children
Recommended product
TRAVELYTES™ FLIGHT
A low-sugar electrolyte stick formulated for in-flight hydration — sodium, potassium, magnesium and B-vitamins in a compact sachet that clears security every time.
View TRAVELYTES™ FLIGHTTRAVELYTES™ products are food supplements that support normal hydration. They are not medicines and are not treatments for flight tiredness, motion sickness, altitude sickness or any other condition.
Frequently Asked Questions
Why do I get dehydrated on a plane?
Aircraft cabins are pressurised with very dry air — typically below 20% relative humidity. Your body loses water through breathing and skin much faster than at ground level.
How much water should I drink on a flight?
A widely cited aviation guideline is around 250 ml (roughly one glass) per hour of flight time. Adjust for body size, alcohol intake and cabin temperature.
Do electrolytes help with flight hydration?
Yes — sodium, potassium and magnesium help your body retain and use water effectively. Many frequent flyers add an electrolyte stick to water during the flight.
Will flight hydration prevent flight tiredness?
No single intervention prevents post-flight tiredness — it is largely a circadian-rhythm adjustment to crossing time zones. Hydration supports how you feel during and after a flight but is not a treatment.
Can I bring electrolyte sticks through airport security?
Yes. Powder electrolyte sticks under 350 ml/g comply with carry-on liquid rules at most airports because they are dry powder until mixed with water bought airside.