How the 720B fits into the 720 story
720B is the representative branch of the Boeing 720 family, capturing the turbofan development that gave the family its most durable operating form.
This page isolates the 720B branch of the Boeing 720 family, focusing on the engines, service entry, seating, range, and mission role that justify a dedicated variant page while keeping the family history on the canonical parent URL.
Service entry
1961
Seating
131 to 149
Range
4,000 nm
Variant history
Why it branches from the family
The 720B is treated as the representative branch because it captures the turbofan development that gave the family its most durable operating form.
Variant pages stay intentionally narrower than the family page so differences in cabin, engines, mission, and market role remain clear without duplicating the full program history.
Fact rows
Reference snapshot
- ICAO designator
- B720
- Designator references
- Engines
- Pratt & Whitney JT3D
- Type data
- Service entry
- 1961
- Operator records
- Typical seating
- 131 to 149
- Operator layouts
- Range
- 4,000 nm
- Planning data
Return to the family page
Variant pages stay intentionally narrower than family pages. They isolate meaningful technical or commercial differences while the canonical family page holds the broader historical narrative.