| City | % Correct |
|---|---|
| Oslo | 98%
|
| Ottawa | 93%
|
| Osaka | 91%
|
| Orlando | 90%
|
| Odessa | 76%
|
| Oklahoma City | 73%
|
| Oxford | 73%
|
| Ouagadougou | 71%
|
| Orléans | 64%
|
| Oran | 58%
|
| Oakland | 56%
|
| Omsk | 52%
|
| Oaxaca | 49%
|
| Oulu | 41%
|
| Odense | 36%
|
| Ostrava | 33%
|
| Osh | 27%
|
| Örebro | 23%
|
| Onitsha | 18%
|
| Osijek | 18%
|