Pilot Robert B Dickerson has visited (landed in) a total of 86 countries but have 153 countries yet to explore.

Afghanistan

Algeria

American Samoa

Anguilla

Antarctica

Azerbaijan

Bahrain

Bangladesh

Barbados

Belarus

Belize

Bolivia

Botswana

British Indian Ocean Territory

Brunei

Burkina Faso

Burundi

Cambodia

Cameroon

Cape Verde

Cayman Islands

Central African Republic

Chile

Christmas Island

Cocos (Keeling) Islands

Colombia

Comoros

Congo

Cook Islands

Costa Rica

Cote D'Ivoire

Dominica

El Salvador

Equatorial Guinea

Eritrea

Eswatini

Falkland Islands

French Guiana

Gabon

Gambia

Georgia

Greenland

Guam

Guatemala

Guinea

Guinea-Bissau

Guyana

Honduras

Iran

Iraq

Isle Of Man

Israel

Johnston Atoll

Jordan

Kazakhstan

Kiribati

Korea

Kosovo

Kuwait

Kyrgyzstan

Laos

Lebanon

Liberia

Libya

Lithuania

Luxembourg

Maldives

Mali

Marshall Islands

Mauritania

Mauritius

Mayotte

Midway Islands

Monaco

Mongolia

Montserrat

Morocco

Mozambique

Myanmar

Namibia

Nauru

New Caledonia

Nicaragua

Niger

Nigeria

Niue

Norfolk Island

North Korea

North Macedonia

Northern Mariana Islands

Oman

Pakistan

Palau

Palestine

Panama

Papua New Guinea

Paraguay

Peru

Philippines

Qatar

Reunion

Rwanda

Saint Helena

Saint Lucia

Saint Pierre and Miquelon

Samoa

Sao Tome and Principe

Saudi Arabia

Senegal

Serbia

Seychelles

Sierra Leone

Singapore

Solomon Islands

Somalia

South Korea

South Sudan

Sri Lanka

Sudan

Syria

Taiwan

Tajikistan

Tanzania

Thailand

Timor Leste

Timor-Leste

Togo

Tonga

Tunisia

Turkmenistan

Turks and Caicos Islands

Tuvalu

Uganda

Ukraine

United Arab Emirates

Uruguay

Uzbekistan

Vanuatu

Venezuela

Vietnam

Virgin Islands, U.S.

Wake Island

Wallis and Futuna

Western Sahara