| Fairfield to Odessa (Texas) | 1,194.41 mi (1,922.23 km) |
| Fairfield to Ogden (Utah) | 572.32 mi (921.06 km) |
| Fairfield to Oildale (California) | 256.43 mi (412.69 km) |
| Fairfield to Ojus (Florida) | 2,568.90 mi (4,134.24 km) |
| Fairfield to Okemos (Michigan) | 1,984.08 mi (3,193.07 km) |
| Fairfield to Oklahoma City (Oklahoma) | 1,365.01 mi (2,196.78 km) |
| Fairfield to Okmulgee (Oklahoma) | 1,444.12 mi (2,324.09 km) |
| Fairfield to Olathe (Kansas) | 1,465.24 mi (2,358.08 km) |
| Fairfield to Old Jamestown (Missouri) | 1,707.36 mi (2,747.74 km) |
| Fairfield to Oldsmar (Florida) | 2,363.86 mi (3,804.26 km) |
| Fairfield to Olean (New York) | 2,292.08 mi (3,688.75 km) |
| Fairfield to Olive Branch (Mississippi) | 1,790.53 mi (2,881.58 km) |
| Fairfield to Olivehurst (California) | 62.30 mi (100.26 km) |
| Fairfield to Olney (Maryland) | 2,399.92 mi (3,862.29 km) |
| Fairfield to Olympia (Washington) | 608.44 mi (979.20 km) |
