This list includes aircraft that have gone missing and whose locations are unknown. According to Annex 13 of the International Civil Aviation Organization, an aircraft is considered missing "when the official search for the plane has ended and the wreckage has not been found." However, there is still an unclear part about how much wreckage must be found for a plane to be declared "recovered." This list does not include every pilot or every passenger who has gone missing, as these are separate categories.

In the tables below, each missing aircraft is described (in the Aircraft column) using one or more details to identify it. If the aircraft had a special or personalized name (for example, Pathfinder), that name is written first (in italics) followed by the type of aircraft (in parentheses). The manufacturer of the aircraft is also included where possible, though it may not always be enough to identify the plane uniquely. Aircraft registrations, which began being used in the early 1900s for identification, are also listed in parentheses in the later tables.

20th century

On November 5, 2009, Clayton Kuhles of miarecoveries.org said he found wreckage near Birmani Kami. However, when it was checked in 2013, it was actually identified as the Convair 240 AP-AEG, which had crashed on March 14, 1953. In January 2012, the Indian paramilitary group Assam Rifles said they found wreckage after a four-month search, but no more information about this discovery was reported. A military transport plane carrying 10 crew members and 57 passengers went missing.