| Gaithersburg to Quarteira | 3,665.36 mi (5,898.82 km) |
| Gaithersburg to Queluz | 3,559.96 mi (5,729.20 km) |
| Gaithersburg to Reguengos de Monsaraz | 3,654.94 mi (5,882.06 km) |
| Gaithersburg to Resende | 3,560.78 mi (5,730.52 km) |
| Gaithersburg to Ribeira Brava | 3,335.08 mi (5,367.30 km) |
| Gaithersburg to Ribeira Grande | 2,759.18 mi (4,440.48 km) |
| Gaithersburg to Rio de Mouro | 3,556.20 mi (5,723.15 km) |
| Gaithersburg to Rio Maior | 3,560.57 mi (5,730.18 km) |
| Gaithersburg to Rio Tinto | 3,530.16 mi (5,681.24 km) |
| Gaithersburg to Sabugal | 3,623.41 mi (5,831.32 km) |
| Gaithersburg to Sacavem | 3,566.75 mi (5,740.13 km) |
| Gaithersburg to Salvaterra de Magos | 3,576.56 mi (5,755.92 km) |
| Gaithersburg to Santa Comba Dao | 3,571.93 mi (5,748.47 km) |
| Gaithersburg to Santa Cruz | 3,348.19 mi (5,388.39 km) |
| Gaithersburg to Santa Iria da Azoia | 3,566.18 mi (5,739.21 km) |
