Royal Air Force Kelstern or RAF Kelstern is a former Royal Air Force satellite station 3.6 miles (5.8 km) south east of Binbrook, Lincolnshire and 4.9 miles (7.9 km) north west of Louth, Lincolnshire, England.

The airfield first opened in 1917 as a night landing ground before closing in 1919.

RAF Kelstern re-opened in 1943 and the following squadrons used the airfield:

• No. 33 Squadron RAF.
• No. 170 Squadron RAF reformed at the airfield on 15 October 1944 with the Avro Lancaster I and III before moving to RAF Dunholme Lodge on 22 October 1944.
• No. 625 Squadron RAF reformed at Kelstern on 1 October 1943 with the Lancaster I and III before moving to RAF Scampton on 5 April 1945, where the squadron disbanded on 14 October 1945.

• List of former Royal Air Force stations

• Falconer, Jonathan (2012). RAF Airfields of World War 2. UK: Ian Allan Publishing. ISBN 978-1-85780-349-5.
• Jefford, C.G. RAF Squadrons, a Comprehensive Record of the Movement and Equipment of all RAF Squadrons and their Antecedents since 1912. Shrewsbury, Shropshire, UK: Airlife Publishing, 1988. ISBN 1-84037-141-2.