Pilot Oliver Ma has visited (landed in) a total of 147 countries but have 93 countries yet to explore.
Albania
Anguilla
Antigua and Barbuda
Barbados
Belize
Benin
Bosnia and Herzegovina
British Indian Ocean Territory
Burkina Faso
Burundi
Cambodia
Cayman Islands
Central African Republic
Chad
Christmas Island
Cocos (Keeling) Islands
Comoros
Congo
Cook Islands
Djibouti
Dominica
El Salvador
Equatorial Guinea
Eswatini
Falkland Islands
Gabon
Gambia
Grenada
Guinea
Guinea-Bissau
Haiti
Isle Of Man
Jamaica
Jersey
Johnston Atoll
Kiribati
Kyrgyzstan
Laos
Lesotho
Liberia
Libya
Libyan Arab Jamahiriya
Mali
Marshall Islands
Mayotte
Micronesia
Midway Islands
Monaco
Mongolia
Montserrat
Morocco
Myanmar
Nicaragua
Niue
Norfolk Island
North Korea
Northern Mariana Islands
Palau
Palestine
Papua New Guinea
Paraguay
Reunion
Saint Helena
Saint Lucia
Saint Pierre and Miquelon
Samoa
Sao Tome and Principe
Serbia
Sierra Leone
Sri Lanka
Suriname
Tajikistan
Timor Leste
Timor-Leste
Togo
Tonga
Trinidad and Tobago
Turkmenistan
Tuvalu
Uganda
Vanuatu
Vietnam
Virgin Islands, U.S.
Wake Island
Wallis and Futuna
Western Sahara
Zambia