Why Flights Avoid Certain Airspace

Flights avoid certain airspace when it is closed or restricted, when there is a security risk, or when weather makes it unsafe. Airlines then fly a longer route, which costs time and fuel.

Common reasons

• Conflict and security risk. Aviation authorities issue warnings about airspace over conflict zones, and airlines may avoid them.
• Government closures. A country can close its airspace to some or all aircraft, or restrict it to certain airlines. Such closures have been used at times between neighbouring countries in South Asia, and notices are updated often, so check current NOTAMs.
• Military activity and exercises. Temporary restricted areas are published by NOTAM.
• Weather and volcanic ash. Storms and ash clouds close airways.

How you see it on a tracker

You may see aircraft bunch up along corridors or detour around an area on the live map. During a closure, aircraft that normally fly a straight line show a curved diversion.

The effect on travellers

Longer routes mean longer flight times, higher fares, extra fuel stops on some long flights and sometimes schedule changes. Where possible, airlines announce changes.

Where to look for official notices

Check the airspace closures and NOTAMs page, the airline, and the aviation authority. Read Pakistan airspace explained for context.

General information only, not legal or safety advice. Details change; check with your airline and the relevant authority. See our editorial policy.