| Didcot to Hutchinson (Minnesota) | 4,011.60 mi (6,456.05 km) |
| Didcot to Hutto (Texas) | 4,847.02 mi (7,800.53 km) |
| Didcot to Hyattsville (Maryland) | 3,611.25 mi (5,811.75 km) |
| Didcot to Hybla Valley (Virginia) | 3,626.02 mi (5,835.51 km) |
| Didcot to Idaho Falls (Idaho) | 4,677.86 mi (7,528.29 km) |
| Didcot to Idylwood (Virginia) | 3,624.72 mi (5,833.42 km) |
| Didcot to Ilchester (Maryland) | 3,592.11 mi (5,780.95 km) |
| Didcot to Immokalee (Florida) | 4,398.84 mi (7,079.25 km) |
| Didcot to Imperial (California) | 5,380.73 mi (8,659.44 km) |
| Didcot to Imperial Beach (California) | 5,447.59 mi (8,767.06 km) |
| Didcot to Independence (Kentucky) | 3,917.71 mi (6,304.95 km) |
| Didcot to Independence (Missouri) | 4,290.31 mi (6,904.59 km) |
| Didcot to Indian Trail (North Carolina) | 3,942.29 mi (6,344.51 km) |
| Didcot to Indiana (Pennsylvania) | 3,626.31 mi (5,835.99 km) |
| Didcot to Indianapolis (Indiana) | 3,942.08 mi (6,344.17 km) |
