Longest Great Circle Line Within a Country

Name the country where a great circle line can be drawn over the country's territory without crossing land of another country
Include overseas territories and uninhabited islands, as long as the great circle line does not cross land territory of another country. Disputed territory is included if it's under the country's de facto control.
Hint: Think about large countries with outlying islands and overseas territories
Read Wikipedia to learn about great circle
Quiz by cuotak
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Last updated: February 11, 2016
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First submittedFebruary 10, 2016
Times taken50
Average score85.0%
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Distance (km)
Country
Great Circle
15324
United States
Guam to US Virgin Islands
13000
United Kingdom
Northumberland County to Falkland Island
9983
France
New Caledonia to Clipperton Island
8099
Russia
Krasnodar Krai to Medny Island
8035
Australia
McDonald Island to Mellish Reef
5709
New Zealand
Penrhyn, Cook Islands to Adams Island
5566
Canada
Yukon to Newfoundland
5237
Indonesia
Aceh to Papua
5101
Brazil
Amazonas to Ilhas de Martim Vaz
5049
China
Heilongjiang to Cuarteron Reef
Distance (km)
Country
Great Circle
4661
Chile
Easter Island to Antártica Chilena
4571
Kiribati
Banaba Island to Caroline Island
3704
India
Jammu and Kashmir to Nicobar Islands
3694
Argentina
Jujuy to Tierra del Fuego
3600
Denmark
Greenland to Zealand
3357
Mexico
Guadalupe Island to Banco Chinchorro
3143
Japan
Yonaguni to Minami-Tori-shima
2962
Kazakhstan
West Kazakhstan to East Kazakhstan
2861
FS Micronesia
Ngulu Atoll to Kosrae Island
2859
South Africa
Limpopo to Marion Island
+1
Level 76
Feb 10, 2016
wow, does this mean that, at last, someone came up with a good definition of 'country length'?! although I guess it might be difficult to define it. are you going to have a 'land only' version? well done!
+1
Level 76
Feb 10, 2016
What a wonderful quiz! As a New Zealander, I'd say no-one here considers Cook Islands to be part of New Zealand, but a separate country. You can't fly from NZ to the Cooks without your passport, and clearing customs at each end. NZ'ers cannot live as of right in the Cooks. NZ and the Cooks are both a part of the "Realm of New Zealand", but that's not a country. The realm is defined as "the lands over which the monarch is the Queen of New Zealand" - in other words the realm is a New Zealand Commonwealth, in exactly the same way as UK has the British Commonwealth (which no-one suggests is a country).
+2
Level 67
Feb 11, 2016
This is similar to China and Hong Kong then. People from China can't visit or live in Hong Kong without a permit, and have to clear customs at each end too. China and Hong Kong drive on the different side of the road, have different internet domains, IDD codes, electrical socket types, currencies, legal systems, Olympic teams, dialects and writing systems etc. Though everyone consider Hong Kong and China as one country.
+1
Level 76
Feb 11, 2016
China actively interferes with Hong Kong at every step, including refusing allowing democracy to operate there. New Zealand does not influence the Cook Islands at all; they operate as completely separate countries.
+1
Level 76
Feb 10, 2016
A related quiz idea for you - would you want to do a similar quiz, but this time allowing the Great Circle to transit other countries along the way? I've done this quiz for the longest distances across the mainlands of countries, which knocks countries like Kiribati from near the top to near the bottom.
+1
Level 77
Feb 10, 2016
This is something new and awesome!