It is safe to dive immediately after flying, assuming the plane has come to a full and complete stop.... and the pilot has turned off the fasten seat belt sign.
Todd
Todd
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Rick Murchison:What we have here are different problems with different concerns. In the "flying after diving" instance, we're concerned about DCS developing from otherwise asymptomatic nitrogen loading when the pressure is reduced by going to altitude. There is no such concern when diving after flying.
However, when on an airliner for a long trip, dehydration and fatigue are often very real concerns that may be masked by the excitement of arrival... so it's a good idea to make sure you're rested and well hydrated before going diving after a long flight.
There is a very good table in the NOAA diving manual, by the way, for calculating how long you should wait to fly, based on your final repetitive group and your flight cabin altitude.
Rick