 Australia
Royal Australian Air Force – Operated one impressed Delta from December 1942 to September 1943.

 Canada
Royal Canadian Air Force
No.
8 Squadron RCAF
No.
119 Squadron RCAF
No.
120 Squadron RCAF
 Spain
Spanish Republican Air Force – ex-Swedish Northrop 1C Delta with LAPE
Nationalist Air Force - Northrop 1D Delta captured on Mar Cantabrico
 United States
United States Coast Guard
 Australia
Royal Australian Air Force – Operated one impressed Delta from December 1942 to September 1943.
 Canada
Royal Canadian Air Force
No. 8 Squadron RCAF
No. 119 Squadron RCAF
No. 120 Squadron RCAF
 Spain
Spanish Republican Air Force – ex-Swedish Northrop 1C Delta with LAPE
Nationalist Air Force - Northrop 1D Delta captured on Mar Cantabrico
 United States
United States Coast Guard
Northrop Delta