What Is an Air Bridge (Jet Bridge)? The Enclosed Walkway Connecting Terminal to Aircraft

An air bridge (also called a jet bridge, jetway, passenger boarding bridge, or aerobridge) is a movable, enclosed connector that extends from an airport terminal gate to an aircraft door, allowing passengers to board and disembark without going outside.

Design and Operation

• Structure: Telescoping steel/aluminum tubes (2–3 sections) on a rotatable column (rotunda) fixed to the terminal.
• Movement: Hydraulic or electric motors raise/lower, extend/retract, and swing the bridge to align with aircraft doors (silhouette guidance systems).
• Docking: Flexible canopy (bellows) seals against aircraft fuselage; automatic leveling adjusts for aircraft height changes during loading.

Key Features

• Weather Protection: Enclosed, climate-controlled (heating/AC) walkway.
• Accessibility: Meets ADA/ICAO standards; slope ≤ 1:12; wheelchair compatible.
• Safety: Non-slip flooring, handrails, emergency lighting, intercom to cockpit, CCTV, fire suppression.
• Compatibility: Adjustable for wide-body (A380, B747, B777) to narrow-body (A320, B737) and regional jets.

Types

Apron Drive (Most Common)

Mobile unit on wheels; drives to aircraft; used where terminal layout requires flexibility.

Fixed / Telescoping

Rotunda fixed to terminal; bridge extends/rotates. Standard at modern gates.

Nose-Loader / Cargo Bridges

For freighter main-deck loading (e.g., B747F nose door).

Benefits

• Passenger comfort (no stairs, rain, heat, cold, jet blast).
• Faster turnaround (simultaneous boarding/deplaning via multiple doors).
• Security (controlled access, no apron exposure).
• Operational efficiency (ground crew stay inside).

History

First installed: 1959, San Francisco (United Airlines) and Chicago O'Hare (American). Revolutionized airport design—enabled larger terminals, faster hub operations.

Air bridges are now standard at almost all commercial airports worldwide, a critical piece of aviation infrastructure.