Flight Lieutenant (pronounced as flight lef-tenant, see Lieutenant) is a junior commissioned rank in the Royal Air Force and the air forces of many Commonwealth countries. It ranks above Flying Officer and immediately below Squadron Leader. The name of the rank is the complete phrase, and is never shortened to "Lieutenant."

It has a NATO ranking code of OF-2, and is equivalent to a Lieutenant in the Royal Navy or a Captain in the British Army or the Royal Marines.

While it does not always apply, a flight lieutenant often commands a flight of aircraft, three or four of which form a squadron.

The rank insignia consists of two narrow blue bands on slightly wider black bands. This is worn on both the lower sleeves of the tunic or on the shoulders of the flying suit or the casual uniform.

See also

• Comparative military ranks