The British Aerospace 146 (also BAe 146) is a short-haul and regional airliner that was manufactured in the United Kingdom by British Aerospace, later part of BAE Systems. Production ran from 1983 until 2001. Manufacture by Avro International Aerospace of an improved version known as the Avro RJ began in 1992. A further-improved version with new engines, the Avro RJX, was announced in 1997, but only two prototypes and one production aircraft were built before production ceased in 2001. With 387 aircraft produced, the Avro RJ/BAe 146 is the most successful British civil jet airliner programme.

The BAe 146/Avro RJ is a high-wing cantilever monoplane with a T-tail. It has four geared turbofan engines mounted on pylons underneath the wings, and has a retractable tricycle landing gear. The aircraft operates very quietly, and as such has been marketed under the name Whisperjet. It sees wide usage at small, city-based airports such as London City Airport. In its primary role, it serves as a regional jet, short-haul airliner, or regional airliner, while examples of the type are also in use as private jets.

The BAe 146 was produced in -100, -200 and -300 models. The equivalent Avro RJ versions are designated RJ70, RJ85, and RJ100. The freight-carrying version carries the designation "QT" (Quiet Trader), and a convertible passenger-or-freight model is designated as "QC" (Quick Change). A "gravel kit" can be fitted to aircraft to enable operations from rough, unprepared airstrips.

The British Aerospace ATP (Advanced Turbo-Prop) is an airliner designed and produced by British Aerospace. It was an evolution of the Hawker Siddeley HS 748, a fairly successful feederliner of the 1960s.

The ATP was developed during the 1980s, events such as such as the 1979 oil crisis and increasing public concern regarding aircraft noise led to business planners at British Aerospace to believe that there was a market for a short-range, low-noise, fuel-efficient turboprop aircraft. First flown on 6 August 1986, by the time it became commercially available, the market segment it fell within was already hotly contested by multiple other airliners, such as the de Havilland Canada Dash 8, ATR 42, and ATR 72. Amid this intense competition, sales of the ATP were limited, leading British Aerospace to terminate production after only eight years, during which a total of 65 aircraft were completed.

The British Aerospace Jetstream is a small twin-turboprop airliner, with a pressurised fuselage, developed as the Jetstream 31 from the earlier Handley Page Jetstream. A larger version of the Jetstream was also manufactured, the British Aerospace Jetstream 41.

Scottish Aviation had taken over production of the original Jetstream design from Handley Page, and when it was nationalised along with other British companies into British Aerospace (later BAE Systems) in 1978, British Aerospace decided the design was worth further development, and started work on a "Mark 3" Jetstream. As with the earlier 3M version for the USAF, the new version was re-engined with newer Garrett turboprops (now Honeywell TPE331) which offered more power (flat rated to 1,020 shp/760 kW with a thermodynamic limit of 1,100 shp/820 kW) and longer overhaul intervals over the original Turbomeca Astazou engines. This allowed the aircraft to be offered in an 18-seat option (six rows, 2+1), with an offset aisle, and with a water methanol option for the engine to allow the ability to operate at maximum load from a greater range of airfields, particularly in the continental United States and Australia.

The result was the Jetstream 31, which first flew on 28 March 1980, being certificated in the UK on 29 June 1982. The new version proved to be as popular as Handley Page hoped the original model would be, and several hundred 31s were built during the 1980s. In 1985, a further engine upgrade was planned, which flew in 1988 as the Jetstream Super 31, also known as the Jetstream 32. Production continued until 1993, by which time 386 31/32s had been produced. Four Jetstream 31s were ordered for the Royal Navy in 1985 as radar observer trainers, the Jetstream T.3, but were later used for VIP transport.

In 1993, British Aerospace adopted the Jetstream name as its brand name for all twin turboprop aircraft. As well as the Jetstream 31 and Jetstream 32, it also built the related Jetstream 41 and the unrelated, but co-branded BAe ATP/Jetstream 61. The Jetstream 61 name was never used in service, and retained its "ATP" marketing name. The company also proposed but never built the Jetstream 51 and Jetstream 71.