| Type | Werk.Nr | Registration | History |
| G31 ba | J3000 | D-1073, VH-URQ | The prototype, G31 ba, c/n 3000, flew in early September 1926. The original Junkers L5 engines proved to be underpowered and the central engine was replaced by a BMW V1. The open cockpit for the crew was a feature of the aircraft. This machine, along with the last three constructed, went to New Guinea where it was initially operated by Bulolo Gold Dredging & CO and then by Guinea Airways as VH-URQ.,Jun. 34 to Apr.42, named 'Pat', destroyed during air raid at Bulolo |
| G31 ce | J3001 | D-1137 | 1926 , Lufthansa Jun. 27 |
| G31 de | J3002 | D-1310, D-ADIN | Lufthansa, , Feb. 28, named 'Herrmann Köhl' . RLM, D-ADIN, 1935, |
| G31 de | J3003 | A-46, OE-LAG, | ÖLAG, , Mai. 28, named 'Österreich', 1000th Junkers aircraft, modified to fe in 1931 . Lufthansa, taken over 1938, not registered |
| G31 de | J3004 | D-1427 | Lufthansa, , Jul. 28 to Sep.28, named 'Deutschland', exhibited at ILA. Crashed and burst into flames near Arnsberg. All occupants were evacuated safely but aircraft christened 'Deutschland' was destroyed by fire. |
| G31 fi | J3005 | D-1473 | Lufthansa, , Okt. 28 to Dez.28, named 'Rheinland', crashed at the Colbitz-Letzlinger Heide in a snow storm. Pilot Capt. Heinrich Doerr (41) killed. |
| G31 fi | J3006 | D-1523, D-ADAR | Lufthansa, , 1929, named 'Nordmark', modified to fo in May 1932 . RLM, 1935 to Okt.38, cancelled |
| G31 fi | J3007 | D-1770, D-ABAR | Lufthansa, , Nov. 29, named 'Preußen', modified to fo in 1931 . RLM, 1936 to Jul.38, cancelled |
| G31 fo | J3008 | D-1722, D-ABIL | Lufthansa, , June. 29, named 'Brandenburg' . RLM, 1936 to Mai.36, crashed following midair collision with Ju52 D-APUT |
| G31 fi | J3009 | D-1786, D-ADUR | Lufthansa, , April. 30, named 'Westmark', modified to fo in 1931. RLM, 1935 to Apr.36, scrapped |
| G31 go | J3010 | VH-UOW, A44-1 | Guinea Airways, registered VH-UOW 10/06/31 to 30/01/42. Impressed by the RAAF on 30/01/42 under requisition 9024. It survived an air-raid on 21/01/42 at Bulolo when 3 other aircraft were destroyed (VH-URQ, UOU and UOV) as it was flying at the time. To 34 Sqn 17/10/42. Used by 36 Sqn to deliver refrigerators to Darwin 19/10/42 and to return with wounded to Vic. Pilot was Flg Officer J.L.Whiteman and Co-Pilot was Pilot Officer Peter Lavarack. Third engine had a valve drop and was blanked off at Cootamundra by RAAF Engineering staff. Arrived at Laverton for repairs. P/O Peter Lavarack took off on test flight 31/10/42, but only two engines developed full power. Aircraft crashed, continued off the strip and collided with the visiting Minister of Air's car, destroying the car and irreparabley damaging the aircraft. |
| G31 go | J3011 | VH-UOU | Guinea Airways , Okt. 30 to Jan.42, named 'Bulolo I Paul', operated for Bululo Gold Dredging Co.. Destroyed during airraid at Bulolo |
| G31 go | J3012 | VH-UOV | Guinea Airways Okt. 30 to Jan.42, named 'Bulolo 2 Peter', operated for Bululo Gold Dredging + Co.. Destroyed during airraid at Bulolo |