Why can’t you fly after scuba diving?

You should not fly right after scuba diving because the pressure inside an airplane cabin is lower than at sea level. After a dive, your body still holds extra nitrogen absorbed from breathing compressed gas at depth. Flying too soon causes that nitrogen to expand faster than your body can release it, which increases the risk of decompression sickness. Even short flights can be risky if you ascend too quickly after diving.

The general rule is to wait at least 12 hours after a single dive and 18 to 24 hours after multiple dives or a full day of diving before flying. That waiting period gives your body time to release excess nitrogen naturally. Most modern dive computers track your exposure and display a “no-fly” countdown timer that tells you when it is safer to board a plane. It is also smart to stay hydrated, rest, and avoid strenuous activity after your last dive. Treat the day after diving as recovery time before you travel home.

Surface Intervals Matter

The computer may know the time, but only you know your body. Give yourself enough time between dives for safety, comfort, and longer bottom times.

Flying After Diving: Rules, Risks & Safe Surface Intervals

Learn safe surface interval rules before flying after scuba diving. Avoid DCS with expert tips and DAN-recommended wait times.

Decompression Illness: DCS, AGE, and PFO Risk

Learn the differences between DCS and AGE and how a PFO can raise risk. Get prevention tips and step by step emergency actions for safer diving.