As Duke of Cornwall, Prince of Wales and later as King, Charles III has been one of the United Kingdom's most important ambassadors. He travels overseas as a representative of the UK and also undertakes tours of Commonwealth realms. He is often accompanied by his wife, Queen Camilla.

As Duke of Cornwall

+DateCountryAreas visitedDetails 22–28 April 1954 Aboard HMY Britannia on her maiden voyage with Princess Anne 30 April – 1 May 1954 TobrukJoined the Queen and the Duke of Edinburgh on Royal Tour. 3–7 May 1954

As Prince of Wales

1960s

+DateCountryAreas visitedDetailsHost 30 January – 1 August 1966VictoriaAttended two terms at Timbertop Campus of Geelong Grammar School4–12 May 1966 (now Papua New Guinea) Port Moresby, PopondettaVisited Dogura Martyrs Memorial School in Popondetta with the Geelong Grammar School seniors1–3 August 19663–16 August 1966 KingstonAccompanied the Duke of Edinburgh who opened the 1966 British Empire and Commonwealth Games20 December 1967Represented the Queen at the memorial service for Prime Minister Harold HoltJuly 1968November 1969Prince Charles visited Malta to attend the bicentenary celebrations of the Royal University of Malta.

1970s

+DateCountryAreas visitedDetailsHost8–9 February 1970StrasbourgAs Chairman of the Countryside in 1970 Committee for Wales, accompanied his father the Duke of Edinburgh to attend the Council of Europe's Conservation Conference.12–30 March 1970Toured the country with the Queen, the Duke of Edinburgh, and Princess Anne.30 March – 8 April 1970Toured the country with the Queen, the Duke of Edinburgh, and Princess Anne.9–14 April 1970OsakaAttended Expo '70.2–15 July 1970OttawaCarried out a two-day visit to Ottawa, before joining the Queen, the Duke of Edinburgh, and Princess Anne for a countrywide tour.16–18 July 1970Washington, D.C.Visited the capital together with Princess Anne as guests of President Richard Nixon's daughters and son-in-law.9–15 October 1970Represented the Queen at Fiji's independence celebrations.15–19 October 197020–22 October 1970To mark the 350th anniversary of the Parliament of Bermuda.22–25 October 197011–12 November 1970On behalf of the Queen, attended a memorial service for Charles de Gaulle.6–20 February 1971Accompanied by Princess Anne.25–27 February 1971OsnabrückVisited the 1st Battalion, the Royal Regiment of Wales, in his role as colonel-in-chief.17–18 May 1972Accompanied the Queen and the Duke of Edinburgh on a state visit.29–31 October 1972West Berlin25–26 January 1973Visited the Royal Regiment of Wales, in his role as colonel-in-chief.1 June 1973To open the Prince of Wales Bastion.6–11 July 1973To attend the independence celebrations on behalf of the Queen.29 January – 6 February 1974ChristchurchJoined the Queen, the Duke of Edinburgh, Princess Anne, and Mark Phillips for the 1974 British Commonwealth Games.4 September 1974Attended the funeral of Norman Kirk.8–12 October 1974Attended the centenary celebrations on behalf of the Queen.12–30 October 1974Prince Charles was present for the inauguration of Anglo-Australian Telescope at Siding Spring Observatory.20–22 February 1975New Delhi22–26 February 1975To attend the coronation of King Birendra of Nepal.20–30 April 1975Ottawa, Northwest Territories14–19 September 1975Attended the independence celebrations on behalf of the Queen.9–11 November 1975Visited the Royal Regiment of Wales, in his role as colonel-in-chief.23–25 July 1976MontrealTo watch the equestrian events of the 1976 Summer Olympics, where Princess Anne was a competitor.6–16 March 197717–25 March 1977To take part in the celebrations of Achimota School's 50th anniversary.25–28 March 1977Toured the country at the invitation of President Félix Houphouët-Boigny.President Houphouët-Boigny28–29 April 1977To attend a Humanitarian Award banquet organised by the Variety Club International.9 May 1977BordeauxViewed an exhibition of British paintings.5–9 July 1977AlbertaCelebrations of the centenary of signing of treaty by Blackfoot and other Indian leaders.18–30 October 1977Chicago, Cleveland, St. Louis, Atlanta, Charleston, Houston, Los Angeles, San Francisco1–11 November 1977Toured the country in his capacity as patron of the Queen's Australian Silver Jubilee Appeal.17–18 November 1977Visited the 1st Battalion, Welsh Guards, as their colonel.31 January 1978West BerlinVisited the 2nd Parachute Regiment, as their colonel.10 February 1978Visited the Cheshire Regiment, as their colonel.8–16 March 197816–22 March 197818–19 May 1978MelbourneAttended the funeral of Sir Robert Menzies.1–2 July 1978Attended the 75th birthday celebrations for King Olav V of Norway.31 August 1978Attended the funeral of President Jomo Kenyatta.23–27 October 19781978Osnabrück, SennelagerVisited Parachute Regiments.29 November – 1 December 1978BrusselsJoined the European Commission for discussions and visited NATO headquarters.3–6 March 19796–8 March 19798–28 March 1979Canberra, Western Australia1–6 April 1979In his capacity as president of the International Council of the United World Colleges, Prince Charles visited Pearson College UWC.29–30 May 1979Visited 2nd Parachute Regiment.28–29 June 1979Tours-sur-MarneAttended a fundraising dinner for United World Colleges.

1980s