| Glens Falls to Olympia Heights (Florida) | 1,272.37 mi (2,047.68 km) |
| Glens Falls to Omaha (Nebraska) | 1,150.52 mi (1,851.58 km) |
| Glens Falls to On Top of the World Designated Place (Florida) | 1,091.83 mi (1,757.13 km) |
| Glens Falls to Onalaska (Wisconsin) | 877.96 mi (1,412.94 km) |
| Glens Falls to Oneida (New York) | 102.85 mi (165.51 km) |
| Glens Falls to Oneonta (New York) | 93.11 mi (149.85 km) |
| Glens Falls to Ontario (California) | 2,426.23 mi (3,904.65 km) |
| Glens Falls to Ontario (Oregon) | 2,140.83 mi (3,445.33 km) |
| Glens Falls to Opa-locka (Florida) | 1,259.28 mi (2,026.61 km) |
| Glens Falls to Opelika (Alabama) | 972.46 mi (1,565.02 km) |
| Glens Falls to Opelousas (Louisiana) | 1,342.63 mi (2,160.75 km) |
| Glens Falls to Orange (California) | 2,444.89 mi (3,934.66 km) |
| Glens Falls to Orange (Texas) | 1,432.55 mi (2,305.47 km) |
| Glens Falls to Orange City (Florida) | 1,079.80 mi (1,737.77 km) |
| Glens Falls to Orangeburg (South Carolina) | 782.25 mi (1,258.90 km) |
