AFP

Airspace Flow Program

An FAA program that manages traffic through specific areas of airspace affected by weather or congestion.

What is AFP?

An Airspace Flow Program (AFP) is a traffic management initiative that assigns departure times to flights passing through a specific area of airspace, rather than to a specific destination airport. AFPs are typically used when severe weather (like a line of thunderstorms) blocks a major route, or when en route sector capacity is reduced. Flights must route around the affected area or accept delays to pass through when capacity allows.

Common Causes

Severe weather blocking air routes
En route sector congestion
Military airspace activation
ATC staffing at en route centers
Special events restricting airspace

Impact & Duration

Impact Level

Medium - Flights routing through affected airspace receive delays or must reroute

Typical Duration

2-6 hours, depending on weather movement or airspace issue resolution

Frequently Asked Questions

How is an AFP different from a GDP?

A GDP targets flights going TO a specific airport. An AFP targets flights going THROUGH a specific piece of airspace, regardless of their destination. A flight could be affected by an AFP even if neither its origin nor destination has any delays.

Can my flight avoid an AFP by rerouting?

Sometimes. Airlines may choose to route around the affected airspace, though this adds flight time and fuel costs. The decision depends on expected delays vs. rerouting costs.