Release Dates
| USA | 23 April 2018 | (Los Angeles World premiere) |
| Australia | 25 April 2018 | |
| Belgium | 25 April 2018 | |
| Switzerland | 25 April 2018 | (French speaking region) |
| Colombia | 25 April 2018 | |
| Denmark | 25 April 2018 | |
| Estonia | 25 April 2018 | |
| Egypt | 25 April 2018 | |
| Finland | 25 April 2018 | |
| France | 25 April 2018 | |
| Hong Kong | 25 April 2018 | |
| Indonesia | 25 April 2018 | |
| Italy | 25 April 2018 | |
| South Korea | 25 April 2018 | |
| Malaysia | 25 April 2018 | |
| Netherlands | 25 April 2018 | |
| Norway | 25 April 2018 | |
| New Zealand | 25 April 2018 | |
| Philippines | 25 April 2018 | |
| Portugal | 25 April 2018 | |
| Sweden | 25 April 2018 | |
| Singapore | 25 April 2018 | |
| Slovenia | 25 April 2018 | |
| Thailand | 25 April 2018 | |
| Taiwan | 25 April 2018 | |
| Vietnam | 25 April 2018 | |
| United Arab Emirates | 26 April 2018 | |
| Argentina | 26 April 2018 | |
| Bahrain | 26 April 2018 | |
| Brazil | 26 April 2018 | |
| Chile | 26 April 2018 | |
| Cyprus | 26 April 2018 | |
| Czech Republic | 26 April 2018 | |
| Germany | 26 April 2018 | |
| UK | 26 April 2018 | |
| Greece | 26 April 2018 | |
| Croatia | 26 April 2018 | |
| Hungary | 26 April 2018 | |
| Ireland | 26 April 2018 | |
| Israel | 26 April 2018 | |
| Cambodia | 26 April 2018 | |
| Kuwait | 26 April 2018 | |
| Latvia | 26 April 2018 | |
| Morocco | 26 April 2018 | |
| Republic of Macedonia | 26 April 2018 | |
| Oman | 26 April 2018 | |
| Peru | 26 April 2018 | |
| Poland | 26 April 2018 | |
| Qatar | 26 April 2018 | |
| Serbia | 26 April 2018 | |
| Saudi Arabia | 26 April 2018 | |
| Slovakia | 26 April 2018 | |
| Tunisia | 26 April 2018 | |
| Ukraine | 26 April 2018 | |
| Uruguay | 26 April 2018 | |
| Bangladesh | 27 April 2018 | |
| Bulgaria | 27 April 2018 | |
| Canada | 27 April 2018 | |
| Spain | 27 April 2018 | |
| India | 27 April 2018 | |
| Iceland | 27 April 2018 | |
| Japan | 27 April 2018 | |
| Sri Lanka | 27 April 2018 | |
| Lithuania | 27 April 2018 | |
| Madagascar | 27 April 2018 | |
| Mexico | 27 April 2018 | |
| Nepal | 27 April 2018 | |
| Pakistan | 27 April 2018 | |
| Romania | 27 April 2018 | |
| Turkey | 27 April 2018 | |
| USA | 27 April 2018 | |
| Venezuela | 27 April 2018 | |
| South Africa | 27 April 2018 | |
| Russia | 3 May 2018 | |
| China | 11 May 2018 | |
| India | 2 October 2018 | (re-release) (Hindi dubbed version) |
Also Known As (AKA)
| Albania | Avengers: Infinity War |
| Argentina | Avengers: Infinity War |
| Bulgaria (Bulgarian title) | Отмъстителите: Война без край |
| Brazil | Vingadores: Guerra Infinita |
| Canada (French title) | Avengers: la guerre de l'infini |
| Czech Republic | Avengers: Infinity War |
| Germany | Avengers: Infinity War |
| Estonia | Tasujad: Igaviku sõda |
| Spain | Vengadores: Infinity War |
| Spain (alternative title) | Vengadores: La guerra del infinito - 1ª parte |
| France | Avengers: Infinity War |
| Greece | Εκδικητές: Ο πόλεμος της αιωνιότητας |
| Croatia | Osvetnici: Rat beskonačnosti |
| Hungary | Bosszúállók: Végtelen háború |
| Israel (Hebrew title) | Ha'nokmim: Milkhemet ha'einsof |
| India (English title) | Avengers: Infinity War |
| Italy | Avengers: Infinity War |
| Lithuania (Lithuanian title) | Kersytojai: Begalybes karas |
| Latvia | Atriebeji: Bezgalibas kars |
| Mexico | Avengers: Infinity War |
| Poland | Avengers: Wojna bez granic |
| Portugal | Vingadores: Guerra do Infinito |
| Romania | Razbunatorii: Razboiul Infinitului |
| Serbia | Osvetnici: Rat beskraja |
| Russia | Мстители: Война бесконечности |
| Slovenia | Maščevalci: Brezmejna vojna |
| Turkey (Turkish title) | Avengers: Sonsuzluk Savasi |
| Ukraine | Месники: Вiйна нескiнченностi |
| USA (fake working title) | Mary Lou |
| USA (informal title) | The Avengers 3 |
| Uruguay (3-D version) | Avengers: Infinity War |
| Vietnam | Avengers: Cuoc Chien Vo Cuc |
| World-wide (working title) (English title) | Avengers: Infinity War - Part I |
