Flying After Diving Calculator
Plan your surface interval before a flight. Enter your flight time and dive profile to see the latest time you should be out of the water.
No-Fly Calculator
Find the latest time you should surface from your last dive so you can safely fly.
More than one dive in a day, or diving across multiple days.
Enter your flight date and time to see your surface deadline.
What is no-fly time?
No-fly time is the interval a diver spends at surface pressure before boarding a flight, so that the nitrogen absorbed during a dive has time to leave the body rather than come out of solution at altitude. The cabin of an airliner is pressurised to somewhere well above sea level, which is why the wait exists at all.
How long should I wait before flying?
The widely taught guidance is a minimum surface interval of about twelve hours after a single no-decompression dive, and about eighteen after repetitive dives or several days of diving. Longer is safer, and any dive requiring decompression stops calls for substantially more. The calculator above works backwards from your flight.
Treat the answer as a planning aid, not a medical ruling. Your own training agency, your dive computer and your doctor take precedence over any web page, and a cold, a long day, dehydration or a hard dive profile are all reasons to wait longer than a table says.
Why does a dive shop care?
Because it decides which bookings should not be sold. The afternoon two-tank on the day before a guest flies home is the trip most likely to be regretted, and a shop that knows a guest's departure date can say so before taking their deposit rather than after.