Introduction to Runway Numbers

Runway numbers are used to identify specific runways at airports. They are based on the compass heading of the runway.

For example, a runway numbered 09 means it’s aligned with a heading of 90 degrees (east).

Runway numbers help pilots know which direction they are taking off or landing. If there are two runways in opposite directions, they’ll have numbers that differ by 180 degrees, like 09 and 27.

Runway Numbers

Each runway number reflects the direction it is heading, rounded to the nearest 10 degrees.

With a full circle encompassing 360 degrees, this system provides a consistent way for pilots to determine a runway’s orientation.

To determine runway direction, add a zero to the given runway number, giving you the runway’s heading.

For example:

• Runway 27 is aligned with a heading of 270° on compass
• Runway 9 is aligned with a heading of 90° on a compass

Example 1: Runway 16

If you’re landing on Runway 16, the runway is headed toward 160°.

This means pilots are approaching from the north and landing toward the south, heading in the direction of 160° on a compass.

Therefore, the plan is headed southeast.

Example 2: Runway 18

If you’re landing on Runway 18, the runway is headed toward 180°.

This means pilots are approaching from the north and landing toward due south, heading in the direction of 180° on a compass.

Therefore, the plan is headed southeast.

Here are two more examples:

Runway numbers are reviewed by the FAA every 5 years, and updated if there’s been a change of more than 7 degrees.

*For the Part 107 exam you just need to know that runway numbers are aligned with magnetic north.