How do I avoid altitude sickness flying to Denver?

Ascending to a higher altitude slowly. Consider staying at a medium altitude of 4,000 to 6,000 ft above sea level for at least a day before ascending to your high-altitude destination. Hydrate before and after you arrive to altitude (a good rule of thumb is drinking enough fluids/water to keep your urine light yellow).



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Hydration: Remember to drink plenty of water before flying, even if you tossed your liquids at the security checkpoint. Avoid alcohol and caffeine, both of which can lead to dehydration. Get up and stretch: Especially on long flights, walk around the cabin and stretch the legs.

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