How long must I wait to fly after a scuba diving activity?

A minimum of 24 hours must be observed after the final dive before boarding an airplane. This safety interval is necessary to prevent decompression sickness, a condition in which nitrogen bubbles form in the bloodstream due to rapid changes in atmospheric pressure. If ascent to the high altitude of a flight cabin occurs too soon, these bubbles can cause joint pain, dizziness, or severe neurological damage. 
We therefore reccomend to schedule underwater excursions early in a trip to ensure this no-fly window is strictly maintained. Adhering to this timeframe allows the body to off-gas nitrogen naturally and helps ensure a safe return journey.