| City | Country | % Correct |
|---|---|---|
| Ottawa | Canada | 100%
|
| Oslo | Norway | 100%
|
| Oxford | United Kingdom | 100%
|
| Orlando | United States | 100%
|
| Okinawa | Japan | 98%
|
| Omsk | Russia | 98%
|
| Orleans | France | 94%
|
| Oaxaca de Juarez | Mexico | 91%
|
| Oldenburg | Germany | 89%
|
| Odessa | Ukraine | 87%
|
| Olsztyn | Poland | 79%
|
| Ouagadougou | Burkina Faso | 66%
|
| Odense | Denmark | 64%
|
| Oran | Algeria | 55%
|
| Ostrava | Czech Republic | 49%
|