Pilot David Erickson has visited (landed in) a total of 96 countries but have 144 countries yet to explore.
Afghanistan
Algeria
American Samoa
Angola
Armenia
Azerbaijan
Bahrain
Bangladesh
Belarus
Benin
Bolivia
Bosnia and Herzegovina
Botswana
British Indian Ocean Territory
Brunei
Bulgaria
Burkina Faso
Burundi
Cambodia
Cameroon
Cape Verde
Cayman Islands
Central African Republic
Chad
Christmas Island
Cocos (Keeling) Islands
Comoros
Congo
Congo (DRC)
Cook Islands
Cote D'Ivoire
Cyprus
Czech Republic
Djibouti
Dominican Republic
Egypt
El Salvador
Equatorial Guinea
Estonia
Eswatini
Ethiopia
Falkland Islands
Faroe Islands
Finland
French Guiana
Gabon
Georgia
Ghana
Gibraltar
Greenland
Guernsey
Guinea
Guinea-Bissau
Guyana
Iraq
Isle Of Man
Israel
Jordan
Kazakhstan
Kenya
Kiribati
Laos
Latvia
Lebanon
Lesotho
Liberia
Libya
Libyan Arab Jamahiriya
Lithuania
Luxembourg
Macau
Madagascar
Malawi
Marshall Islands
Martinique
Mauritius
Mayotte
Micronesia
Moldova
Monaco
Mongolia
Montenegro
Montserrat
Mozambique
New Caledonia
Norfolk Island
North Macedonia
Northern Mariana Islands
Oman
Palau
Palestine
Paraguay
Rwanda
Saint Helena
Saint Pierre and Miquelon
Samoa
Sao Tome and Principe
Saudi Arabia
Seychelles
Sierra Leone
Singapore
Slovakia
Slovenia
Solomon Islands
Somalia
South Sudan
Sri Lanka
Sudan
Suriname
Syria
Tanzania
Timor Leste
Timor-Leste
Togo
Tonga
Trinidad and Tobago
Tunisia
Turkmenistan
Turks and Caicos Islands
Tuvalu
Uganda
Uruguay
Uzbekistan
Vanuatu
Wallis and Futuna
Western Sahara
Yemen
Zambia
Zimbabwe