Definition
A specific flight path published on a VFR Terminal Area Chart that allows VFR pilots to fly through Class B airspace under an ATC clearance. The route defines the headings, altitudes, and entry and exit points the pilot is expected to follow once cleared by the controlling facility.
Plain English
A pre-drawn path on the chart that lets a VFR pilot fly across the busy airspace around a major airport, as long as ATC gives them permission to use it.
Context Anchor
Seen on VFR charts and terminal area charts near major airports with Class B airspace, especially when planning to fly across or through that area instead of going around it.
Derivation
Transition comes from the Latin transire, meaning to go across. The route is literally a way to go across the Class B airspace rather than around or above it.
Why Pilots Care
These routes reduce the chance of airspace violations and help VFR pilots cross high-traffic zones safely without needing full IFR clearance.
Intuition Check
Do not assume “published route” means automatic permission to enter. The route shows the planned path; air traffic control clearance is still required before entering Class B airspace.
Example Sentence 1
Approaching the LAX area, the pilot requested the Mini Route, a published Class B airspace VFR transition route, and received clearance to proceed at 3,500 feet.
Example Sentence 2
Following the Class B airspace VFR transition route kept the flight clear of the primary arrival corridors.