Movies with the first letter - "O"
- Operation Finale (2018)
- Operation Gold Fish (2019)
- Operation Golden Phoenix (1994)
- Opération Lady Marlène (1975)
- Operation Leopard (1980)
- Operation Libertad (2012)
- Operation Mincemeat (2021)
- Operation Odessa (2018)
- Operation Oman (2014)
- Operation Overlord (2021)
- Operation Pacific (1951)
- Operation Petticoat (1959)
- Opération Portugal (2021)
- Operation Romeo (2022)
- Operation Seawolf (2022)
- Operation Splitsville (1998)
- Operation Sunflower (2014)
- Operation Thunderbolt (1977)
- Operation Toussaint: Operation Underground Railroad and the Fight to End Modern Day Slavery (2018)
- Operation Wedding (2013)
- Operation YY (2000)
- Operation: Desert Stormy (2007)
- Operation: Endgame (2010)
- Operation: Take No Prisoners (1987)
- Operation: Tropical Stormy (2009)
- Operator 13 (1934)
- Operazione San Pietro (1967)
- Ophélia (1963)
- Ophelia (2018)
- Opium (2013)