Airspace Flow Program
An FAA program that manages traffic through specific areas of airspace affected by weather or congestion.
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.
- Severe weather blocking air routes
- En route sector congestion
- Military airspace activation
- ATC staffing at en route centers
- Special events restricting airspace
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.
Related Terms
Ground Delay Program
An FAA traffic management program that assigns specific departure times to flights heading to a congested airport.
Weather Impact Levels
FAA classifications indicating how weather conditions are affecting airport operations.
Estimated Departure Clearance Time
The FAA-assigned time when a flight is expected to receive clearance to depart during traffic management programs.
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