| Flagstaff to Orangevale (California) | 582.41 mi (937.30 km) |
| Flagstaff to Orchards (Washington) | 923.25 mi (1,485.82 km) |
| Flagstaff to Orcutt (California) | 498.37 mi (802.05 km) |
| Flagstaff to Oregon (Ohio) | 1,581.87 mi (2,545.78 km) |
| Flagstaff to Oregon (Wisconsin) | 1,301.86 mi (2,095.14 km) |
| Flagstaff to Oregon City (Oregon) | 907.61 mi (1,460.66 km) |
| Flagstaff to Orem (Utah) | 353.16 mi (568.35 km) |
| Flagstaff to Orinda (California) | 614.65 mi (989.18 km) |
| Flagstaff to Orland Park (Illinois) | 1,355.56 mi (2,181.57 km) |
| Flagstaff to Orlando (Florida) | 1,829.27 mi (2,943.92 km) |
| Flagstaff to Ormond Beach (Florida) | 1,821.60 mi (2,931.58 km) |
| Flagstaff to Oro Valley (Arizona) | 194.67 mi (313.29 km) |
| Flagstaff to Oroville (California) | 621.68 mi (1,000.50 km) |
| Flagstaff to Oshkosh (Wisconsin) | 1,364.48 mi (2,195.92 km) |
| Flagstaff to Oskaloosa (Iowa) | 1,110.00 mi (1,786.38 km) |
