How Much Water to Drink While Long-Haul Flight
Flights over 6 hours cause significant cumulative dehydration. The combination of low humidity, pressurised cabins, and immobility can lead to serious fluid deficits.
3500ml
Recommended daily intake
3.5L
litres
14
glasses
tips_and_updatesHydration Tips for Long-Haul Flight
- check_circleDrink at least 250ml of water every hour for the entire flight duration
- check_circleBring a 1-litre bottle and aim to refill it multiple times
- check_circleAvoid alcohol entirely on flights over 6 hours
- check_circleChoose water over tea or coffee at in-flight drink service
- check_circleWalk the aisle and stretch while drinking water to prevent deep vein thrombosis
Track Your Long-Haul Flight Hydration
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Start Tracking FreeRelated Hydration Guides
Pregnancy
Pregnant women need extra water to support increased blood volume, amniotic fluid, and the growing baby. Dehydration can cause contractions.
3000ml/day
Breastfeeding
Breast milk is approximately 87% water. Nursing mothers need extra fluids to maintain milk production and their own hydration.
3500ml/day
Diabetes
High blood sugar causes the kidneys to flush excess glucose through urine, leading to increased fluid loss. People with diabetes are at chronic dehydration risk.
3000ml/day
Kidney Stones
Adequate fluid intake dilutes substances in urine that form stones. Urologists recommend high water intake as the single most effective kidney stone prevention strategy.
3500ml/day
UTI Prevention
Drinking plenty of water helps flush bacteria from the urinary tract before infection can develop. Consistent hydration is one of the best defenses against recurrent UTIs.
3000ml/day
Constipation
The colon absorbs water from stool as it passes through. When you are dehydrated, the colon takes more water, making stools hard and difficult to pass.
2800ml/day