There is quite a list of countries and unrecognized territories which have no extradition treaty with the US.
Afghanistan, Algeria, Andorra,Angola,Armenia, Azerbaijan, Bahrain, Bangladesh, Belarus, Benin, Bhutan, Botswana,Brunei,, Burkina Faso, Burundi, Cambodia, Cameroon, Cape Verde, Chad, Central African Republic, China, Comoros, Djibouti, DR Congo, Equatorial Guinea, Eritrea, Ethiopia, Gabon, Georgia, Guinea, Guinea Bissau, Indonesia, Iran, Ivory Coast, Kuwait, Kyrgyzstan, Laos, Lebanon, Libya, Madagascar, Mali, Mauritania, Moldova, Mongolia, Morocco, Mozambique, Namibia, Nepal, Niger, North Korea, Oman, "Palestine", Qatar, Russia, Rwanda, Samoa, Saudi Arabia, Senegal, Sao Tome and Principe, Solomon Islands, Somalia, South Sudan, Sudan, Syria, Taiwan, Tajikistan, Timor Leste, Togo, Tunisia, Turkmenistan, Uganda, United Arab Emirates, Uzbekistan, Vanuatu, Vatican City, Vietnam, "Western Sahara", and Yemen.
https://worldpopulationreview.com/country-rankings/countries-without-extraditionMost are not on my bucket list.